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Dockerizing Xtext web app [message #1841312]

Tue, 11 May 2021 18:48

Eclipse User

Hi,
I have created a DSL web application.
When running the application from the terminal (with the command gradle jettyRun) , everything works as expected.
When dockerizing the same application, the applications works, but the xtext-services dont . When calling the generator, I get a 500 from the xtext services.

POST http://192.168.1.4:18282/xtext-service/generate?resource=56d64298.mdl   [HTTP/1.1 500 Server Error 12ms]

Also i get this from the logs

84021 [qtp399573350-17] WARN org.eclipse.jetty.servlet.ServletHandler - /xtext-service/generate
 java.awt.HeadlessException:
 No X11 DISPLAY variable was set, but this program performed an operation which requires it.

Any idea?

Best Regards,
Michael

[Updated on: Tue, 11 May 2021 18:54] by Moderator

Re: Dockerizing Xtext web app [message #1841314 is a reply to message #1841312]

Wed, 12 May 2021 00:29

Eclipse User

How does your docker file look like?
Do you package the war into a jetty base?
Do other services work?
The question is what exception happens in the generator service
what does docker logs tell?
Maybe you should also debug the awt exception

[Updated on: Wed, 12 May 2021 03:31] by Moderator

Re: Dockerizing Xtext web app [message #1841339 is a reply to message #1841314]

Wed, 12 May 2021 11:23

Eclipse User

Hi Christian,

I created a Docker compose file running both the webapp and the tomcat services.

The application communicates with a remote DB through the Tomcat webservices. The problem is only that i am having issues with the content-assist and the generator. I am still getting this 500 error when calling the xtext/services as i mentioned.

Also in the console log i get the following message while triggering the generator

 11123 [qtp399573350-16] WARN org.eclipse.jetty.servlet.ServletHandler - /xtext-service/generate
webapp_1  | java.awt.HeadlessException:
webapp_1  | No X11 DISPLAY variable was set, but this program performed an operation which requires it.
webapp_1  |     at java.applet.Applet.<init>(Applet.java:67)
webapp_1  |     at webapp.generator.JsonGenerator.<init>(JsonGenerator.java:147)
webapp_1  |     at webapp.generator.MdlGenerator.doGenerate(MdlGenerator.java:366)
webapp_1  |     at org.eclipse.xtext.generator.GeneratorDelegate.doGenerate(GeneratorDelegate.java:43)
webapp_1  |     at org.eclipse.xtext.generator.GeneratorDelegate.generate(GeneratorDelegate.java:34)
webapp_1  |     at org.eclipse.xtext.web.server.generator.GeneratorService.compute(GeneratorService.java:121)
webapp_1  |     at org.eclipse.xtext.web.server.generator.GeneratorService.compute(GeneratorService.java:46)
webapp_1  |     at org.eclipse.xtext.web.server.model.XtextWebDocument.getCachedServiceResult(XtextWebDocument.java:74)
webapp_1  |     at org.eclipse.xtext.web.server.model.XtextWebDocumentAccess$3.exec(XtextWebDocumentAccess.java:311)
webapp_1  |     at org.eclipse.xtext.web.server.model.XtextWebDocumentAccess$3.exec(XtextWebDocumentAccess.java:305)
webapp_1  |     at org.eclipse.xtext.util.concurrent.CancelableUnitOfWork.exec(CancelableUnitOfWork.java:26)
webapp_1  |     at org.eclipse.xtext.web.server.model.XtextWebDocumentAccess.doAccess(XtextWebDocumentAccess.java:210)
webapp_1  |     at org.eclipse.xtext.web.server.model.XtextWebDocumentAccess.readOnly(XtextWebDocumentAccess.java:160)
webapp_1  |     at org.eclipse.xtext.web.server.model.XtextWebDocumentAccess.getCachedServiceResult(XtextWebDocumentAccess.java:317)
webapp_1  |     at org.eclipse.xtext.web.server.model.AbstractCachedService.getResult(AbstractCachedService.java:27)
webapp_1  |     at org.eclipse.xtext.web.server.generator.GeneratorService.getArtifact(GeneratorService.java:146)
webapp_1  |     at org.eclipse.xtext.web.server.generator.GeneratorService.getArtifact(GeneratorService.java:178)
webapp_1  |     at org.eclipse.xtext.web.server.XtextServiceDispatcher.lambda$null$26(XtextServiceDispatcher.java:785)
webapp_1  |     at org.eclipse.xtext.web.servlet.XtextServlet.doService(XtextServlet.java:165)
webapp_1  |     at org.eclipse.xtext.web.servlet.XtextServlet.doPost(XtextServlet.java:132)
webapp_1  |     at javax.servlet.http.HttpServlet.service(HttpServlet.java:707)
webapp_1  |     at org.eclipse.xtext.web.servlet.XtextServlet.service(XtextServlet.java:60)
webapp_1  |     at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)
webapp_1  |     at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:837)
webapp_1  |     at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:583)
webapp_1  |     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
webapp_1  |     at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548)
webapp_1  |     at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:226)
webapp_1  |     at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1160)
webapp_1  |     at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:511)
webapp_1  |     at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
webapp_1  |     at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1092)
webapp_1  |     at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
webapp_1  |     at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:134)
webapp_1  |     at org.eclipse.jetty.server.Server.handle(Server.java:518)
webapp_1  |     at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:308)
webapp_1  |     at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:244)
webapp_1  |     at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:273)
webapp_1  |     at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:95)
webapp_1  |     at org.eclipse.jetty.io.SelectChannelEndPoint$2.run(SelectChannelEndPoint.java:93)
webapp_1  |     at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.produceAndRun(ExecuteProduceConsume.java:246)
webapp_1  |     at org.eclipse.jetty.util.thread.strategy.ExecuteProduceConsume.run(ExecuteProduceConsume.java:156)
webapp_1  |     at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:654)
webapp_1  |     at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:572)
webapp_1  |     at java.lang.Thread.run(Thread.java:748)

Bests

[Updated on: Thu, 20 May 2021 10:52] by Moderator

Re: Dockerizing Xtext web app [message #1841340 is a reply to message #1841339]

Wed, 12 May 2021 11:26

Eclipse User

Why does your generator call into applet

Re: Dockerizing Xtext web app [message #1841341 is a reply to message #1841340]

Wed, 12 May 2021 11:31

Eclipse User

I don't really know? Is this a bug ?

Re: Dockerizing Xtext web app [message #1841342 is a reply to message #1841341]

Wed, 12 May 2021 11:35

Eclipse User

Obviously you need to have an Xserver running
To call into applet
So you could play around
With Xvfb or Xnvc but maybe you don't need it
Thus would be interesting what you do there

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