[2.2.1-java] - play-internal-execution-context - NullPointerException

[eduard...@usmediaconsulting.com]

Hi guys,  since the last week we are reciving the folowing exception, 

the only difference is that we begin to have more demands on our service. Never had problems before.

I was thinking to upgrade the version of play.

Any ideas to debug?

Regards

Eduardo

2015-03-06 13:46:02,704 - [ERROR] - from application in play-internal-execution-context-3

! @6ld07376h - Internal server error, for (GET) [/match/add?gid=CAESEJEte6dMvPPIgZhP9MuJ_7U&google_cver=1] ->

play.api.Application$$anon$1: Execution exception[[NullPointerException: null]]

        at play.api.Application$class.handleError(Application.scala:289) ~[play_2.10-2.1.1.jar:2.1.1]

        at play.api.DefaultApplication.handleError(Application.scala:383) [play_2.10-2.1.1.jar:2.1.1]

        at play.core.server.netty.PlayDefaultUpstreamHandler$$anon$2$$anonfun$handle$1.apply(PlayDefaultUpstreamHandler.scala:144) [play_2.10-2.1.1.jar:2.1.1]

        at play.core.server.netty.PlayDefaultUpstreamHandler$$anon$2$$anonfun$handle$1.apply(PlayDefaultUpstreamHandler.scala:140) [play_2.10-2.1.1.jar:2.1.1]

        at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) [play_2.10-2.1.1.jar:2.1.1]

        at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) [play_2.10-2.1.1.jar:2.1.1]

        at play.api.libs.concurrent.PlayPromise$$anonfun$extend$1$$anonfun$apply$1.apply(Promise.scala:104) [play_2.10-2.1.1.jar:2.1.1]

        at scala.concurrent.impl.Future$PromiseCompletingRunnable.liftedTree1$1(Future.scala:24) [scala-library.jar:na]

        at scala.concurrent.impl.Future$PromiseCompletingRunnable.run(Future.scala:24) [scala-library.jar:na]

        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_55]

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_55]

        at java.lang.Thread.run(Thread.java:744) [na:1.7.0_55]

java.lang.NullPointerException: null

[Mariot Chauvin]

Hi Eduardo,

I think you get an NPE somewhere in your code but that unfortunately, if you don't see any other stacktrace in your log for the NPE, in this version of play (2.1.1) the initial stacktrace is not logged.

Cheers,

Mariot

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[Eduardo Cusa]

Hi Mariot , yes you are right, there is an NPE in my code.
Finally i have found the problem and could fixed it.
Regards
Eduardo

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[Sandeep Desam]

Hi Mariot,

I am getting same issue .But I dont know where exactly I am getting NPE.Below is my error stack

play.api.Application$$anon$1: Execution exception[[NullPointerException: null content]]

at play.api.Application$class.handleError(Application.scala:293) ~[play_2.10.jar:2.2.6]

at play.api.DefaultApplication.handleError(Application.scala:399) [play_2.10.jar:2.2.6]

at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3$$anonfun$applyOrElse$3.apply(PlayDefaultUpstreamHandler.scala:268) [play_2.10.jar:2.2.6]

at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3$$anonfun$applyOrElse$3.apply(PlayDefaultUpstreamHandler.scala:268) [play_2.10.jar:2.2.6]

at scala.Option.map(Option.scala:145) [scala-library.jar:na]

at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3.applyOrElse(PlayDefaultUpstreamHandler.scala:268) [play_2.10.jar:2.2.6]

at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$3.applyOrElse(PlayDefaultUpstreamHandler.scala:264) [play_2.10.jar:2.2.6]

at scala.concurrent.Future$$anonfun$recoverWith$1.apply(Future.scala:344) [scala-library.jar:na]

at scala.concurrent.Future$$anonfun$recoverWith$1.apply(Future.scala:343) [scala-library.jar:na]

at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) [scala-library.jar:na]

at play.api.libs.iteratee.Execution$$anon$1.execute(Execution.scala:43) [play-iteratees_2.10.jar:2.2.6]

at scala.concurrent.impl.CallbackRunnable.executeWithValue(Promise.scala:40) [scala-library.jar:na]

at scala.concurrent.impl.Promise$DefaultPromise.tryComplete(Promise.scala:248) [scala-library.jar:na]

at scala.concurrent.Promise$class.complete(Promise.scala:55) [scala-library.jar:na]

at scala.concurrent.impl.Promise$DefaultPromise.complete(Promise.scala:153) [scala-library.jar:na]

at scala.concurrent.Future$$anonfun$map$1.apply(Future.scala:235) [scala-library.jar:na]

at scala.concurrent.Future$$anonfun$map$1.apply(Future.scala:235) [scala-library.jar:na]

at scala.concurrent.impl.CallbackRunnable.run(Promise.scala:32) [scala-library.jar:na]

at scala.concurrent.forkjoin.ForkJoinTask$AdaptedRunnableAction.exec(ForkJoinTask.java:1361) [scala-library.jar:na]

at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260) [scala-library.jar:na]

at scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339) [scala-library.jar:na]

at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979) [scala-library.jar:na]

at scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107) [scala-library.jar:na]

Caused by: java.lang.NullPointerException: null content

at play.mvc.Results$Status.<init>(Results.java:1274) ~[play_2.10.jar:2.2.6]

at play.mvc.Results.ok(Results.java:186) ~[play_2.10.jar:2.2.6]

at controllers.Application.getDMIFamilySelectionInfo(Application.java:302) ~[classes/:na]

Please help me with this,

[Greg Methvin]

Hi Sandeep,

You can figure out where the exception is coming from in your app by looking at the stack trace. At the bottom, you see "Caused by: java.lang.NullPointerException: null content". The stack trace given is:

at play.mvc.Results$Status.<init>(Results.java:1274) ~[play_2.10.jar:2.2.6]

at play.mvc.Results.ok(Results.java:186) ~[play_2.10.jar:2.2.6]

at controllers.Application.getDMIFamilySelectionInfo(Application.java:302) ~[classes/:na]

So if you look at the relevant lines of code, it seems like the JsonNode is null, and this happens because you're passing a null JsonNode to Results.ok on line 302 of your Application.java file

In general, if you look at the last "cause" exception in the stack trace and find the first line of code there coming from your application, it should be pretty straightforward to figure out what is causing the exception.

Greg

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Greg Methvin

Tech Lead - Play Framework

Lightbend, Inc.