If I open my Vaadin-based app in different tabs and try to navigate to a view that loads a lot of data on one tab I can’t navigate among the views in the others. They stuck while changing the view until long-running operation on the first tab is over.
And another example of the issue: if I open multiple tabs simultaneously they noticeable render one by one. So it looks like only one “Navigator” in one thread works at the same time.
I’m using Vaadin 8.4.1, vaadin-cdi 2.0.0, Java EE 7, GlassFish 4.1.1, Eclipselink 2.7.1.
Stuck threads looks like this:
"http-listener-1(4)" - Thread t@36
java.lang.Thread.State: WAITING
at sun.misc.Unsafe.park(Native Method)
- waiting to lock <8d265d2> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) owned by "http-listener-1(3)" t@35
at java.util.concurrent.locks.LockSupport.park(LockSupport.java:175)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:836)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:870)
at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1199)
at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:209)
at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:285)
at com.vaadin.server.VaadinService.lockSession(VaadinService.java:702)
at com.vaadin.server.VaadinService.findOrCreateVaadinSession(VaadinService.java:738)
at com.vaadin.server.VaadinService.findVaadinSession(VaadinService.java:602)
at com.vaadin.server.VaadinService.handleRequest(VaadinService.java:1595)
at com.vaadin.cdi.server.VaadinCDIServletService.handleRequest(VaadinCDIServletService.java:92)
at com.vaadin.server.VaadinServlet.service(VaadinServlet.java:445)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
...
Running thread:
"http-listener-1(3)" - Thread t@35
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
at java.net.SocketInputStream.read(SocketInputStream.java:170)
at java.net.SocketInputStream.read(SocketInputStream.java:141)
at org.postgresql.core.VisibleBufferedInputStream.readMore(VisibleBufferedInputStream.java:140)
at org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:109)
at org.postgresql.core.VisibleBufferedInputStream.read(VisibleBufferedInputStream.java:67)
at org.postgresql.core.PGStream.receiveChar(PGStream.java:293)
at org.postgresql.core.v3.QueryExecutorImpl.processResults(QueryExecutorImpl.java:1947)
at org.postgresql.core.v3.QueryExecutorImpl.execute(QueryExecutorImpl.java:306)
- locked <237b368a> (a org.postgresql.core.v3.QueryExecutorImpl)
at org.postgresql.jdbc.PgStatement.executeInternal(PgStatement.java:441)
at org.postgresql.jdbc.PgStatement.execute(PgStatement.java:365)
at org.postgresql.jdbc.PgPreparedStatement.executeWithFlags(PgPreparedStatement.java:155)
at org.postgresql.jdbc.PgPreparedStatement.executeQuery(PgPreparedStatement.java:118)
at org.eclipse.persistence.internal.databaseaccess.DatabaseAccessor.executeSelect(DatabaseAccessor.java:1009)
...
at com.sun.ejb.containers.EJBLocalObjectInvocationHandlerDelegate.invoke(EJBLocalObjectInvocationHandlerDelegate.java:88)
at com.sun.proxy.$Proxy190.fetchData(Unknown Source)
...
at myCustomApp.vaadin.view.MyView.enter(MyView.java:123)
at com.vaadin.navigator.Navigator.performNavigateTo(Navigator.java:778)
at com.vaadin.navigator.Navigator.lambda$navigateTo$9a874efd$1(Navigator.java:702)
at com.vaadin.navigator.Navigator$$Lambda$29/69849314.run(Unknown Source)
at com.vaadin.navigator.ViewBeforeLeaveEvent.navigate(ViewBeforeLeaveEvent.java:54)
at com.vaadin.navigator.View.beforeLeave(View.java:79)
at com.vaadin.navigator.Navigator.runAfterLeaveConfirmation(Navigator.java:730)
at com.vaadin.navigator.Navigator.navigateTo(Navigator.java:701)
at com.vaadin.navigator.Navigator.navigateTo(Navigator.java:678)
...
Threads:
I have 100% uncoupled backend so along with Vaadin UI I have the spare old-good-servlet-based one that works perfectly. I can open couple of dozens tabs with servlets that invoke absolutely the same backend methods and they render simultaneously. So it’s hardly something with Java EE/EclipseLink.
Does anybody have any ideas where to start in solving this mystery? Maybe it’s related to CDI somehow? Is it bug or feature eventually :)?
