Vaadin Spring App not found by server

General
1

I have a simple Vaadin Spring App. The following code is supposed make it possible for the browser to find the app under the address http://localhost:8080/MyApp/ui :

[code]
@SpringUI(path = “/ui”)
public class MyUI extends UI {

@Override protected void init(VaadinRequest vaadinRequest) {
      //bla
}

}
[/code]However, I’m getting a 404 error.

To check that the server was working correctly I created a file “index.html” in the WebContent Folder of the app. I directed my browser to http://localhost:8080/MyApp and the content was displayed correctly.

However, http://localhost:8080/MyApp/ui is giving me a 404 error

Does anybody have a clue what might be the problem?

2

Have you checked in your logs that the Vaadin servlet has been initialized?

You shuold see log lines similiar to the following

...
Servlet will be mapped to URLs 
[/vaadinServlet/*, /VAADIN/*]
...
Mapping servlet: 'springVaadinServlet' to 
[/vaadinServlet/*, /VAADIN/*]
...
Forwarding @SpringUI URLs from {/ui=org.springframework.web.servlet.mvc.ServletForwardingController@310b2d9b, /ui/=org.springframework.web.servlet.mvc.ServletForwardingController@310b2d9b}
...
Mapped URL path 
[/ui] onto handler of type [class org.springframework.web.servlet.mvc.ServletForwardingController]

Mapped URL path 
[/ui/] onto handler of type [class org.springframework.web.servlet.mvc.ServletForwardingController]

....
3

Below you see the output I get in the console when running the application. … Apparently the servlet doesn’t get initialized. How can I make the Vaadin servlet get initialized?

Aug 18, 2017 7:55:42 PM org.apache.tomcat.util.digester.SetPropertiesRule begin

WARNING: [SetPropertiesRule]
{Server/Service/Engine/Host/Context} Setting property ‘source’ to ‘org.eclipse.jst.jee.server:demo’ did not find a matching property.

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Server version: Apache Tomcat/8.5.16

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Server built: Jun 21 2017 17:01:09 UTC

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Server number: 8.5.16.0

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: OS Name: Mac OS X

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: OS Version: 10.12.6

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Architecture: x86_64

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Java Home: /Library/Java/JavaVirtualMachines/jdk1.8.0_111.jdk/Contents/Home/jre

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: JVM Version: 1.8.0_111-b14

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: JVM Vendor: Oracle Corporation

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: CATALINA_BASE: /Users/thomasoechsle/eclipse-workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: CATALINA_HOME: /Users/thomasoechsle/apache-tomcat-8.5.16

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Command line argument: -agentlib:jdwp=transport=dt_socket,suspend=y,address=localhost:56447

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Command line argument: -Dcatalina.base=/Users/thomasoechsle/eclipse-workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Command line argument: -Dcatalina.home=/Users/thomasoechsle/apache-tomcat-8.5.16

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Command line argument: -Dwtp.deploy=/Users/thomasoechsle/eclipse-workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Command line argument: -Djava.endorsed.dirs=/Users/thomasoechsle/apache-tomcat-8.5.16/endorsed

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.VersionLoggerListener log

INFO: Command line argument: -Dfile.encoding=UTF-8

Aug 18, 2017 7:55:42 PM org.apache.catalina.core.AprLifecycleListener lifecycleEvent

INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path:
[/Users/thomasoechsle/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.]

Aug 18, 2017 7:55:42 PM org.apache.coyote.AbstractProtocol init

INFO: Initializing ProtocolHandler [“http-nio-8089”]

Aug 18, 2017 7:55:42 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector

INFO: Using a shared selector for servlet write/read

Aug 18, 2017 7:55:42 PM org.apache.coyote.AbstractProtocol init

INFO: Initializing ProtocolHandler [“ajp-nio-8009”]

Aug 18, 2017 7:55:42 PM org.apache.tomcat.util.net.NioSelectorPool getSharedSelector

INFO: Using a shared selector for servlet write/read

Aug 18, 2017 7:55:42 PM org.apache.catalina.startup.Catalina load

INFO: Initialization processed in 1188 ms

Aug 18, 2017 7:55:42 PM org.apache.catalina.core.StandardService startInternal

INFO: Starting service [Catalina]

Aug 18, 2017 7:55:42 PM org.apache.catalina.core.StandardEngine startInternal

INFO: Starting Servlet Engine: Apache Tomcat/8.5.16

Aug 18, 2017 7:55:43 PM org.apache.coyote.AbstractProtocol start

INFO: Starting ProtocolHandler [“http-nio-8089”]

Aug 18, 2017 7:55:43 PM org.apache.coyote.AbstractProtocol start

INFO: Starting ProtocolHandler [“ajp-nio-8009”]

Aug 18, 2017 7:55:43 PM org.apache.catalina.startup.Catalina start

INFO: Server startup in 695 ms

4

Are you using spring boot? If so all the stuff should be autoconfigured.
Otherwise try to follow the instructions at
http://vaadin.github.io/spring-tutorial/#_configuring_and_using_vaadin_spring_without_spring_boot

HTH
Marco