Play framework deadlock issue

[ghost]

Hi All,

I am getting the following thread trace in the play application server when it keeps running for a long time (say one day). it hangs indefinitely and doesn't process any new request. I have to restart the server for that.

Following is the excerpt from the thread trace taken using jstack.

Please let me know why is it occuring and what is the resolution. This is very critical to our project.

"New I/O worker #1" prio=10 tid=0x00007f7254681000 nid=0x6cda waiting for monitor entry [0x00007f72506fd000]
java.lang.Thread.State: BLOCKED (on object monitor)
at play.core.ReloadableApplication.get(ApplicationProvider.scala:103)
- waiting to lock <0x00000000a839d460> (a play.core.ReloadableApplication)
at play.core.server.Server$class.sendHandler$1(Server.scala:56)
at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:88)
at play.core.server.Server$$anonfun$getHandlerFor$4.apply(Server.scala:87)
at scala.util.Either$RightProjection.flatMap(Either.scala:523)
at play.core.server.Server$class.getHandlerFor(Server.scala:87)
at play.core.server.NettyServer.getHandlerFor(NettyServer.scala:35)
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$7.apply(PlayDefaultUpstreamHandler.scala:112)
at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$7.apply(PlayDefaultUpstreamHandler.scala:112)
at scala.util.Either.fold(Either.scala:98)
at play.core.server.netty.PlayDefaultUpstreamHandler.messageReceived(PlayDefaultUpstreamHandler.scala:106)
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:787)
at com.typesafe.netty.http.pipelining.HttpPipeliningHandler.messageReceived(HttpPipeliningHandler.java:64)
at org.jboss.netty.channel.SimpleChannelHandler.handleUpstream(SimpleChannelHandler.java:88)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:787)
at org.jboss.netty.handler.codec.http.HttpContentDecoder.messageReceived(HttpContentDecoder.java:108)
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline$DefaultChannelHandlerContext.sendUpstream(DefaultChannelPipeline.java:787)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:296)
at org.jboss.netty.handler.codec.frame.FrameDecoder.unfoldAndFireMessageReceived(FrameDecoder.java:459)
at org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:536)
at org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:435)
at org.jboss.netty.channel.SimpleChannelUpstreamHandler.handleUpstream(SimpleChannelUpstreamHandler.java:70)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:560)
at org.jboss.netty.channel.DefaultChannelPipeline.sendUpstream(DefaultChannelPipeline.java:555)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:268)
at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:255)
at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:88)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.process(AbstractNioWorker.java:107)
at org.jboss.netty.channel.socket.nio.AbstractNioSelector.run(AbstractNioSelector.java:312)
at org.jboss.netty.channel.socket.nio.AbstractNioWorker.run(AbstractNioWorker.java:88)
at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:178)
at org.jboss.netty.util.ThreadRenamingRunnable.run(ThreadRenamingRunnable.java:108)
at org.jboss.netty.util.internal.DeadLockProofWorker$1.run(DeadLockProofWorker.java:42)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)
at java.lang.Thread.run(Thread.java:636)

[jroper]

You're running the application in dev mode. Don't do that in production. See here for docs:

http://www.playframework.com/documentation/2.1.x/Production

In future if you have questions, please ask them on the mailing list, the issue tracker is just for bugs.