UI "hangs"

John207 · December 4, 2013, 11:51am

Hello.
I’m developing Vaadin application (Vaadin 7.1.8, Java 7u45, Tomcat 7.0.42). I use multi-windowed interface in my application. Problem is that UI “hangs”. It looks like red load indicator shows infinitely after some idle timeout (2-5 minutes) or when resizing window rapidly. No any messages, errors etc. Tomcat reports idle session during “hang”. Session timeout is set to 1 hour and heartbeat interval is 30 sec.
Push and PreserveOnRefresh are enabled.
Another problem is that when resizing window in Firefox CPU utilization increases up to about 100% and window resizes discretely.

Any ideas?
Thanks.

Teppo · December 4, 2013, 12:59pm

Hi,

the hanging issue sounds like
http://dev.vaadin.com/ticket/13015
. Please wait for 7.1.9 where it should be fixed, or downgrade to 7.1.7 in the meantime. According to the ticket 7.1.7 should not suffer from this.

John207 · December 5, 2013, 7:59am

Hi,

I downgraded Vaadin to 7.1.7 and Tomcat to 7.0.39 but the problem remained.

Teppo · December 5, 2013, 8:44am

Hi,

ok, then it might be some other issue.

What you could still try is add this to your UI.init method:

getPushConfiguration().setParameter("timeout", "-1");

and then add to your servlet init parameters a new parameter named “org.atmosphere.websocket.maxIdleTime” and give it a large enough value (equal to your session timeout). Note that the value is in milliseconds.

Johannes13 · December 5, 2013, 9:31am

Please enable assertions on the server (-ea parameter to the JVM) if they aren’t already enabled. Beyond that, it’s hard to say what might be wrong without more information, preferably a test app that manifests the issue.

John207 · December 5, 2013, 10:11am

Teppo Kurki:

Hi,

ok, then it might be some other issue.

What you could still try is add this to your UI.init method:
getPushConfiguration().setParameter("timeout", "-1"); 
and then add to your servlet init parameters a new parameter named “org.atmosphere.websocket.maxIdleTime” and give it a large enough value (equal to your session timeout). Note that the value is in milliseconds.

I did but another problem appeared. Now application hangs randomly when window opens or when scrolling a table in a window.

John207 · December 5, 2013, 2:06pm

I had enabled assertions so what to do next? Sorry, I’m newbie in java and Vaadin. Timeout is set to -1 as Teppo Kurki wrote.

John207 · December 5, 2013, 2:10pm

Can’t attach file here because of database error so I post it:

dec 05, 2013 5:42:42 PM org.apache.catalina.core.AprLifecycleListener init
INFO: Loaded APR based Apache Tomcat Native library 1.1.27 using APR version 1.4.6.
dec 05, 2013 5:42:42 PM org.apache.catalina.core.AprLifecycleListener init
INFO: APR capabilities: IPv6 [true]
, sendfile [true]
, accept filters [false]
, random [true]
.
dec 05, 2013 5:42:42 PM org.apache.catalina.core.AprLifecycleListener initializeSSL
INFO: OpenSSL successfully initialized (OpenSSL 1.0.1d 5 Feb 2013)
dec 05, 2013 5:42:43 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-apr-8080"]

dec 05, 2013 5:42:43 PM org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-apr-8009"]

dec 05, 2013 5:42:43 PM org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 1411 ms
dec 05, 2013 5:42:43 PM org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
dec 05, 2013 5:42:43 PM org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.42
dec 05, 2013 5:42:43 PM org.apache.catalina.startup.HostConfig deployWAR
INFO: Deploying web application archive C:\apache-tomcat-7.0.42\webapps\fastcom.war
dec 05, 2013 5:42:45 PM org.apache.catalina.session.StandardManager doLoad
SEVERE: IOException while loading persisted sessions: java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.jdom2.input.SAXBuilder
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.jdom2.input.SAXBuilder
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.defaultReadObject(Unknown Source)
    at com.vaadin.event.ListenerMethod.readObject(ListenerMethod.java:106)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at java.util.HashSet.readObject(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at java.util.HashMap.readObject(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at java.util.HashMap.readObject(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1595)
    at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1060)
    at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:284)
    at org.apache.catalina.session.StandardManager.load(StandardManager.java:204)
    at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:491)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5443)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:976)
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1653)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.io.NotSerializableException: org.jdom2.input.SAXBuilder
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteObject(Unknown Source)
    at com.vaadin.event.ListenerMethod.writeObject(ListenerMethod.java:88)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.writeObject(Unknown Source)
    at java.util.HashSet.writeObject(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.writeObject(Unknown Source)
    at java.util.HashMap.writeObject(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.writeObject(Unknown Source)
    at java.util.HashMap.writeObject(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.writeObject(Unknown Source)
    at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1671)
    at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:1077)
    at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:432)
    at org.apache.catalina.session.StandardManager.unload(StandardManager.java:353)
    at org.apache.catalina.session.StandardManager.stopInternal(StandardManager.java:518)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5622)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1575)
    at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1564)
    ... 4 more

dec 05, 2013 5:42:45 PM org.apache.catalina.session.StandardManager startInternal
SEVERE: Exception loading sessions from persistent storage
java.io.WriteAbortedException: writing aborted; java.io.NotSerializableException: org.jdom2.input.SAXBuilder
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.defaultReadObject(Unknown Source)
    at com.vaadin.event.ListenerMethod.readObject(ListenerMethod.java:106)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at java.util.HashSet.readObject(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at java.util.HashMap.readObject(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor18.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at java.util.HashMap.readObject(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeReadObject(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.defaultReadFields(Unknown Source)
    at java.io.ObjectInputStream.readSerialData(Unknown Source)
    at java.io.ObjectInputStream.readOrdinaryObject(Unknown Source)
    at java.io.ObjectInputStream.readObject0(Unknown Source)
    at java.io.ObjectInputStream.readObject(Unknown Source)
    at org.apache.catalina.session.StandardSession.readObject(StandardSession.java:1595)
    at org.apache.catalina.session.StandardSession.readObjectData(StandardSession.java:1060)
    at org.apache.catalina.session.StandardManager.doLoad(StandardManager.java:284)
    at org.apache.catalina.session.StandardManager.load(StandardManager.java:204)
    at org.apache.catalina.session.StandardManager.startInternal(StandardManager.java:491)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5443)
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
    at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
    at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
    at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:976)
    at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1653)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.io.NotSerializableException: org.jdom2.input.SAXBuilder
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteObject(Unknown Source)
    at com.vaadin.event.ListenerMethod.writeObject(ListenerMethod.java:88)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.writeObject(Unknown Source)
    at java.util.HashSet.writeObject(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.writeObject(Unknown Source)
    at java.util.HashMap.writeObject(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.writeObject(Unknown Source)
    at java.util.HashMap.writeObject(Unknown Source)
    at sun.reflect.GeneratedMethodAccessor25.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at java.io.ObjectStreamClass.invokeWriteObject(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.defaultWriteFields(Unknown Source)
    at java.io.ObjectOutputStream.writeSerialData(Unknown Source)
    at java.io.ObjectOutputStream.writeOrdinaryObject(Unknown Source)
    at java.io.ObjectOutputStream.writeObject0(Unknown Source)
    at java.io.ObjectOutputStream.writeObject(Unknown Source)
    at org.apache.catalina.session.StandardSession.writeObject(StandardSession.java:1671)
    at org.apache.catalina.session.StandardSession.writeObjectData(StandardSession.java:1077)
    at org.apache.catalina.session.StandardManager.doUnload(StandardManager.java:432)
    at org.apache.catalina.session.StandardManager.unload(StandardManager.java:353)
    at org.apache.catalina.session.StandardManager.stopInternal(StandardManager.java:518)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.core.StandardContext.stopInternal(StandardContext.java:5622)
    at org.apache.catalina.util.LifecycleBase.stop(LifecycleBase.java:232)
    at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1575)
    at org.apache.catalina.core.ContainerBase$StopChild.call(ContainerBase.java:1564)
    ... 4 more

dec 05, 2013 5:42:45 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\apache-tomcat-7.0.42\webapps\docs
dec 05, 2013 5:42:45 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\apache-tomcat-7.0.42\webapps\examples
dec 05, 2013 5:42:45 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\apache-tomcat-7.0.42\webapps\host-manager
dec 05, 2013 5:42:45 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\apache-tomcat-7.0.42\webapps\manager
dec 05, 2013 5:42:45 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory C:\apache-tomcat-7.0.42\webapps\ROOT
dec 05, 2013 5:42:45 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-apr-8080"]

dec 05, 2013 5:42:46 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-apr-8009"]

dec 05, 2013 5:42:46 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 2786 ms
dec 05, 2013 5:42:47 PM com.vaadin.server.DefaultDeploymentConfiguration checkProductionMode
WARNING:
=================================================================
Vaadin is running in DEBUG MODE.
Add productionMode=true to web.xml to disable debug features.
To show debug window, add ?debug to your application URL.
=================================================================
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework addAtmosphereHandler
INFO: Installed AtmosphereHandler com.vaadin.server.communication.PushHandler mapped to context-path: /*
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.DefaultBroadcaster <init>
INFO: /* support Out Of Order Broadcast: false
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework autoDetectWebSocketHandler
INFO: Auto detecting WebSocketHandler in /WEB-INF/classes/
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework initWebSocket
INFO: Installed WebSocketProtocol org.atmosphere.websocket.protocol.SimpleHttpProtocol
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework autoDetectContainer
INFO: Atmosphere is using async support: org.atmosphere.container.Tomcat7AsyncSupportWithWebSocket running under container: Apache Tomcat/7.0.42
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework configureAtmosphereInterceptor
INFO: Installed Default AtmosphereInterceptor [Android Interceptor Support, SSE Interceptor Support, JSONP Interceptor Support, Atmosphere JavaScript Protocol, Browser disconnection detection]
. Set org.atmosphere.cpr.AtmosphereInterceptor.disableDefaults in your xml to disable them.
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework init
WARNING: No BroadcasterCache configured. Broadcasted message between client reconnection will be LOST. It is recommended to configure the org.atmosphere.cache.UUIDBroadcasterCache
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework init
INFO: Shared ExecutorService supported: true
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework init
INFO: HttpSession supported: true
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework init
INFO: Using BroadcasterFactory: org.atmosphere.cpr.DefaultBroadcasterFactory
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework init
INFO: Using WebSocketProcessor: org.atmosphere.websocket.DefaultWebSocketProcessor
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework init
INFO: Using Broadcaster: org.atmosphere.cpr.DefaultBroadcaster
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework init
INFO: Atmosphere Framework 1.0.14.vaadin4 started.
dec 05, 2013 5:42:48 PM org.atmosphere.cpr.AtmosphereFramework interceptor
INFO: Installed AtmosphereInterceptor  Track Message Size Interceptor using |.
dec 05, 2013 5:42:59 PM org.atmosphere.cpr.AtmosphereFramework doCometSupport
WARNING: Failed using comet support: org.atmosphere.container.Tomcat7AsyncSupportWithWebSocket, error: Tomcat failed to detect this is a Comet application because context.xml is missing or the Http11NioProtocol Connector is not enabled.
If that's not the case, you can also remove META-INF/context.xml and WEB-INF/lib/atmosphere-compat-tomcat.jar Is the Nio or Apr Connector enabled?
dec 05, 2013 5:42:59 PM org.atmosphere.cpr.AtmosphereFramework doCometSupport
WARNING: Using org.atmosphere.container.Tomcat7BIOSupportWithWebSocket
dec 05, 2013 5:45:13 PM com.vaadin.server.communication.PushHandler onThrowable
SEVERE: Exception in push connection
java.lang.RuntimeException: java.io.IOException: The WebSocket connection has been closed
    at org.atmosphere.cpr.AtmosphereResponse$4.write(AtmosphereResponse.java:709)
    at com.vaadin.server.communication.PushHandler.onStateChange(PushHandler.java:331)
    at org.atmosphere.cpr.DefaultBroadcaster.invokeOnStateChange(DefaultBroadcaster.java:1163)
    at org.atmosphere.cpr.DefaultBroadcaster.prepareInvokeOnStateChange(DefaultBroadcaster.java:1183)
    at org.atmosphere.cpr.DefaultBroadcaster.executeAsyncWrite(DefaultBroadcaster.java:1054)
    at org.atmosphere.cpr.DefaultBroadcaster$3.run(DefaultBroadcaster.java:636)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: The WebSocket connection has been closed
    at org.apache.catalina.websocket.WsOutbound.writeTextMessage(WsOutbound.java:166)
    at org.atmosphere.container.version.TomcatWebSocket.write(TomcatWebSocket.java:75)
    at org.atmosphere.container.version.TomcatWebSocket.write(TomcatWebSocket.java:36)
    at org.atmosphere.cpr.AtmosphereResponse$4.write(AtmosphereResponse.java:706)
    ... 10 more

dec 05, 2013 5:45:14 PM com.vaadin.server.communication.PushHandler onThrowable
SEVERE: Exception in push connection
java.lang.AssertionError
    at com.vaadin.ui.UI.getPushConnection(UI.java:1379)
    at com.vaadin.server.communication.PushHandler.getConnectionForUI(PushHandler.java:300)
    at com.vaadin.server.communication.PushHandler.access$300(PushHandler.java:55)
    at com.vaadin.server.communication.PushHandler$3.run(PushHandler.java:183)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:275)
    at com.vaadin.server.communication.PushHandler.disconnect(PushHandler.java:377)
    at com.vaadin.server.communication.PushHandler.onResume(PushHandler.java:369)
    at org.atmosphere.cpr.AtmosphereResourceImpl.onResume(AtmosphereResourceImpl.java:818)
    at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:771)
    at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:749)
    at org.atmosphere.cpr.AtmosphereResourceImpl.resume(AtmosphereResourceImpl.java:297)
    at com.vaadin.server.communication.AtmospherePushConnection.disconnect(AtmospherePushConnection.java:223)
    at com.vaadin.ui.UI.setPushConnection(UI.java:1402)
    at com.vaadin.server.communication.PushHandler$3.run(PushHandler.java:210)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:275)
    at com.vaadin.server.communication.PushHandler.disconnect(PushHandler.java:377)
    at com.vaadin.server.communication.PushHandler.onStateChange(PushHandler.java:316)
    at org.atmosphere.cpr.AsynchronousProcessor.invokeAtmosphereHandler(AsynchronousProcessor.java:553)
    at org.atmosphere.cpr.AsynchronousProcessor.completeLifecycle(AsynchronousProcessor.java:498)
    at org.atmosphere.cpr.AsynchronousProcessor.cancelled(AsynchronousProcessor.java:587)
    at org.atmosphere.container.BlockingIOCometSupport.cancelled(BlockingIOCometSupport.java:178)
    at org.atmosphere.cpr.AsynchronousProcessor$AsynchronousProcessorHook.closed(AsynchronousProcessor.java:628)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.close(DefaultWebSocketProcessor.java:268)
    at org.atmosphere.container.TomcatWebSocketHandler.onClose(TomcatWebSocketHandler.java:77)
    at org.apache.catalina.websocket.StreamInbound.doOnClose(StreamInbound.java:222)
    at org.apache.catalina.websocket.StreamInbound.closeOutboundConnection(StreamInbound.java:206)
    at org.apache.catalina.websocket.StreamInbound.onData(StreamInbound.java:137)
    at org.apache.coyote.http11.upgrade.UpgradeProcessor.upgradeDispatch(UpgradeProcessor.java:83)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:587)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

dec 05, 2013 5:45:14 PM org.atmosphere.cpr.AtmosphereResourceImpl notifyListeners
WARNING: Listener error {}
java.lang.AssertionError
    at com.vaadin.ui.UI.getPushConnection(UI.java:1379)
    at com.vaadin.server.communication.PushHandler.getConnectionForUI(PushHandler.java:300)
    at com.vaadin.server.communication.PushHandler.access$300(PushHandler.java:55)
    at com.vaadin.server.communication.PushHandler$3.run(PushHandler.java:183)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:275)
    at com.vaadin.server.communication.PushHandler.disconnect(PushHandler.java:377)
    at com.vaadin.server.communication.PushHandler.onThrowable(PushHandler.java:362)
    at org.atmosphere.cpr.AtmosphereResourceImpl.onThrowable(AtmosphereResourceImpl.java:806)
    at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:787)
    at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:749)
    at org.atmosphere.cpr.AtmosphereResourceImpl.resume(AtmosphereResourceImpl.java:297)
    at com.vaadin.server.communication.AtmospherePushConnection.disconnect(AtmospherePushConnection.java:223)
    at com.vaadin.ui.UI.setPushConnection(UI.java:1402)
    at com.vaadin.server.communication.PushHandler$3.run(PushHandler.java:210)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:275)
    at com.vaadin.server.communication.PushHandler.disconnect(PushHandler.java:377)
    at com.vaadin.server.communication.PushHandler.onStateChange(PushHandler.java:316)
    at org.atmosphere.cpr.AsynchronousProcessor.invokeAtmosphereHandler(AsynchronousProcessor.java:553)
    at org.atmosphere.cpr.AsynchronousProcessor.completeLifecycle(AsynchronousProcessor.java:498)
    at org.atmosphere.cpr.AsynchronousProcessor.cancelled(AsynchronousProcessor.java:587)
    at org.atmosphere.container.BlockingIOCometSupport.cancelled(BlockingIOCometSupport.java:178)
    at org.atmosphere.cpr.AsynchronousProcessor$AsynchronousProcessorHook.closed(AsynchronousProcessor.java:628)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.close(DefaultWebSocketProcessor.java:268)
    at org.atmosphere.container.TomcatWebSocketHandler.onClose(TomcatWebSocketHandler.java:77)
    at org.apache.catalina.websocket.StreamInbound.doOnClose(StreamInbound.java:222)
    at org.apache.catalina.websocket.StreamInbound.closeOutboundConnection(StreamInbound.java:206)
    at org.apache.catalina.websocket.StreamInbound.onData(StreamInbound.java:137)
    at org.apache.coyote.http11.upgrade.UpgradeProcessor.upgradeDispatch(UpgradeProcessor.java:83)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:587)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

dec 05, 2013 5:45:14 PM com.vaadin.server.communication.PushHandler$3 run
WARNING: Could not find push connection to close: 2623853b-c911-4a70-963d-3540a9682daa with transport WEBSOCKET
dec 05, 2013 5:47:27 PM com.vaadin.server.communication.PushHandler onThrowable
SEVERE: Exception in push connection
java.lang.RuntimeException: java.io.IOException: The WebSocket connection has been closed
    at org.atmosphere.cpr.AtmosphereResponse$4.write(AtmosphereResponse.java:709)
    at com.vaadin.server.communication.PushHandler.onStateChange(PushHandler.java:331)
    at org.atmosphere.cpr.DefaultBroadcaster.invokeOnStateChange(DefaultBroadcaster.java:1163)
    at org.atmosphere.cpr.DefaultBroadcaster.prepareInvokeOnStateChange(DefaultBroadcaster.java:1183)
    at org.atmosphere.cpr.DefaultBroadcaster.executeAsyncWrite(DefaultBroadcaster.java:1054)
    at org.atmosphere.cpr.DefaultBroadcaster$3.run(DefaultBroadcaster.java:636)
    at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
    at java.util.concurrent.FutureTask.run(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: The WebSocket connection has been closed
    at org.apache.catalina.websocket.WsOutbound.writeTextMessage(WsOutbound.java:166)
    at org.atmosphere.container.version.TomcatWebSocket.write(TomcatWebSocket.java:75)
    at org.atmosphere.container.version.TomcatWebSocket.write(TomcatWebSocket.java:36)
    at org.atmosphere.cpr.AtmosphereResponse$4.write(AtmosphereResponse.java:706)
    ... 10 more

dec 05, 2013 5:47:27 PM com.vaadin.server.communication.PushHandler onThrowable
SEVERE: Exception in push connection
java.lang.AssertionError
    at com.vaadin.ui.UI.getPushConnection(UI.java:1379)
    at com.vaadin.server.communication.PushHandler.getConnectionForUI(PushHandler.java:300)
    at com.vaadin.server.communication.PushHandler.access$300(PushHandler.java:55)
    at com.vaadin.server.communication.PushHandler$3.run(PushHandler.java:183)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:275)
    at com.vaadin.server.communication.PushHandler.disconnect(PushHandler.java:377)
    at com.vaadin.server.communication.PushHandler.onResume(PushHandler.java:369)
    at org.atmosphere.cpr.AtmosphereResourceImpl.onResume(AtmosphereResourceImpl.java:818)
    at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:771)
    at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:749)
    at org.atmosphere.cpr.AtmosphereResourceImpl.resume(AtmosphereResourceImpl.java:297)
    at com.vaadin.server.communication.AtmospherePushConnection.disconnect(AtmospherePushConnection.java:223)
    at com.vaadin.ui.UI.setPushConnection(UI.java:1402)
    at com.vaadin.server.communication.PushHandler$3.run(PushHandler.java:210)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:275)
    at com.vaadin.server.communication.PushHandler.disconnect(PushHandler.java:377)
    at com.vaadin.server.communication.PushHandler.onStateChange(PushHandler.java:316)
    at org.atmosphere.cpr.AsynchronousProcessor.invokeAtmosphereHandler(AsynchronousProcessor.java:553)
    at org.atmosphere.cpr.AsynchronousProcessor.completeLifecycle(AsynchronousProcessor.java:498)
    at org.atmosphere.cpr.AsynchronousProcessor.cancelled(AsynchronousProcessor.java:587)
    at org.atmosphere.container.BlockingIOCometSupport.cancelled(BlockingIOCometSupport.java:178)
    at org.atmosphere.cpr.AsynchronousProcessor$AsynchronousProcessorHook.closed(AsynchronousProcessor.java:628)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.close(DefaultWebSocketProcessor.java:268)
    at org.atmosphere.container.TomcatWebSocketHandler.onClose(TomcatWebSocketHandler.java:77)
    at org.apache.catalina.websocket.StreamInbound.doOnClose(StreamInbound.java:222)
    at org.apache.catalina.websocket.StreamInbound.closeOutboundConnection(StreamInbound.java:206)
    at org.apache.catalina.websocket.StreamInbound.onData(StreamInbound.java:137)
    at org.apache.coyote.http11.upgrade.UpgradeProcessor.upgradeDispatch(UpgradeProcessor.java:83)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:587)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

dec 05, 2013 5:47:27 PM org.atmosphere.cpr.AtmosphereResourceImpl notifyListeners
WARNING: Listener error {}
java.lang.AssertionError
    at com.vaadin.ui.UI.getPushConnection(UI.java:1379)
    at com.vaadin.server.communication.PushHandler.getConnectionForUI(PushHandler.java:300)
    at com.vaadin.server.communication.PushHandler.access$300(PushHandler.java:55)
    at com.vaadin.server.communication.PushHandler$3.run(PushHandler.java:183)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:275)
    at com.vaadin.server.communication.PushHandler.disconnect(PushHandler.java:377)
    at com.vaadin.server.communication.PushHandler.onThrowable(PushHandler.java:362)
    at org.atmosphere.cpr.AtmosphereResourceImpl.onThrowable(AtmosphereResourceImpl.java:806)
    at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:787)
    at org.atmosphere.cpr.AtmosphereResourceImpl.notifyListeners(AtmosphereResourceImpl.java:749)
    at org.atmosphere.cpr.AtmosphereResourceImpl.resume(AtmosphereResourceImpl.java:297)
    at com.vaadin.server.communication.AtmospherePushConnection.disconnect(AtmospherePushConnection.java:223)
    at com.vaadin.ui.UI.setPushConnection(UI.java:1402)
    at com.vaadin.server.communication.PushHandler$3.run(PushHandler.java:210)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:275)
    at com.vaadin.server.communication.PushHandler.disconnect(PushHandler.java:377)
    at com.vaadin.server.communication.PushHandler.onStateChange(PushHandler.java:316)
    at org.atmosphere.cpr.AsynchronousProcessor.invokeAtmosphereHandler(AsynchronousProcessor.java:553)
    at org.atmosphere.cpr.AsynchronousProcessor.completeLifecycle(AsynchronousProcessor.java:498)
    at org.atmosphere.cpr.AsynchronousProcessor.cancelled(AsynchronousProcessor.java:587)
    at org.atmosphere.container.BlockingIOCometSupport.cancelled(BlockingIOCometSupport.java:178)
    at org.atmosphere.cpr.AsynchronousProcessor$AsynchronousProcessorHook.closed(AsynchronousProcessor.java:628)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.close(DefaultWebSocketProcessor.java:268)
    at org.atmosphere.container.TomcatWebSocketHandler.onClose(TomcatWebSocketHandler.java:77)
    at org.apache.catalina.websocket.StreamInbound.doOnClose(StreamInbound.java:222)
    at org.apache.catalina.websocket.StreamInbound.closeOutboundConnection(StreamInbound.java:206)
    at org.apache.catalina.websocket.StreamInbound.onData(StreamInbound.java:137)
    at org.apache.coyote.http11.upgrade.UpgradeProcessor.upgradeDispatch(UpgradeProcessor.java:83)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:587)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

dec 05, 2013 5:47:27 PM com.vaadin.server.communication.PushHandler$3 run
WARNING: Could not find push connection to close: 759949ff-7a69-42cd-b013-986fb8d82aca with transport WEBSOCKET

John207 · December 5, 2013, 2:19pm

And a little bit more:

dec 05, 2013 5:47:27 PM com.vaadin.server.communication.PushHandler$3 run
WARNING: Could not find push connection to close: 759949ff-7a69-42cd-b013-986fb8d82aca with transport WEBSOCKET
dec 05, 2013 6:02:09 PM org.atmosphere.websocket.DefaultWebSocketProcessor dispatch
WARNING: Failed invoking AtmosphereFramework.doCometSupport()
java.lang.AssertionError: Got push from the client even though the connection does not seem to be valid. This might happen if a HttpSession is serialized and deserialized while the push connection is kept open or if the UI has a connection of unexpected type.
    at com.vaadin.server.communication.PushHandler$2.run(PushHandler.java:141)
    at com.vaadin.server.communication.PushHandler.callWithUi(PushHandler.java:275)
    at com.vaadin.server.communication.PushHandler.onRequest(PushHandler.java:295)
    at org.atmosphere.cpr.AsynchronousProcessor.action(AsynchronousProcessor.java:259)
    at org.atmosphere.cpr.AsynchronousProcessor.suspended(AsynchronousProcessor.java:166)
    at org.atmosphere.container.TomcatWebSocketUtil.doService(TomcatWebSocketUtil.java:137)
    at org.atmosphere.container.Tomcat7BIOSupportWithWebSocket.service(Tomcat7BIOSupportWithWebSocket.java:61)
    at org.atmosphere.cpr.AtmosphereFramework.doCometSupport(AtmosphereFramework.java:1448)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:219)
    at org.atmosphere.websocket.DefaultWebSocketProcessor$2.run(DefaultWebSocketProcessor.java:183)
    at org.atmosphere.util.VoidExecutorService.execute(VoidExecutorService.java:101)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.dispatch(DefaultWebSocketProcessor.java:178)
    at org.atmosphere.websocket.DefaultWebSocketProcessor.invokeWebSocketProtocol(DefaultWebSocketProcessor.java:167)
    at org.atmosphere.container.TomcatWebSocketHandler.onTextMessage(TomcatWebSocketHandler.java:92)
    at org.apache.catalina.websocket.MessageInbound.onTextData(MessageInbound.java:74)
    at org.apache.catalina.websocket.StreamInbound.doOnTextData(StreamInbound.java:187)
    at org.apache.catalina.websocket.StreamInbound.onData(StreamInbound.java:135)
    at org.apache.coyote.http11.upgrade.UpgradeProcessor.upgradeDispatch(UpgradeProcessor.java:83)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:587)
    at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:1852)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)

dec 05, 2013 6:02:09 PM org.atmosphere.websocket.protocol.SimpleHttpProtocol onError
WARNING: java.lang.AssertionError: Got push from the client even though the connection does not seem to be valid. This might happen if a HttpSession is serialized and deserialized while the push connection is kept open or if the UI has a connection of unexpected type. Status 500 Message Server Error

Darren · December 12, 2013, 11:44pm

Hi John, I just saw your post and thought you might be running into similar problems that I came up against implementing Push in my Vaadin app in Tomcat 7.

I see that you got this error:

Failed using comet support: org.atmosphere.container.Tomcat7AsyncSupportWithWebSocket, 
error: Tomcat failed to detect this is a Comet application because context.xml is missing or the Http11NioProtocol Connector is not enabled.
If that's not the case, you can also remove META-INF/context.xml and WEB-INF/lib/atmosphere-compat-tomcat.jar Is the Nio or Apr Connector enabled?

As I pointed out in a previous forum post, (
https://vaadin.com/forum#!/thread/4268603
), the fall-back to Comet never works in Tomcat with Vaadin 7.1 Push applications.

Once I set the following attribute:

org.atmosphere.useWebSocketAndServlet3=true

then I stopped getting the error above, and browsers using WebSockets were able to stay connected to the app.

I hope this helps.

– Darren Evenson

John207 · December 13, 2013, 6:48am

Hi Darren, thanks for your answer. But I already replaced push with polling, now all is working fine.