[jboss-jira] [JBoss JIRA] (WFLY-3834) Memory leak in org.xnio.ByteBufferSlicePool

Stuart Douglas (JIRA) issues at jboss.org
Wed Sep 10 02:55:19 EDT 2014 

    [ https://issues.jboss.org/browse/WFLY-3834?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13000657#comment-13000657 ] 

Stuart Douglas commented on WFLY-3834:
--------------------------------------

I added some tracing into XNIO, and this is the stack trace that results in the leak:

6:54:30,281 INFO  [stdout] (Finalizer) BUFFER LEAK
16:54:30,533 ERROR [stderr] (Finalizer) java.lang.Throwable
16:54:30,533 ERROR [stderr] (Finalizer) 	at org.xnio.ByteBufferSlicePool$PooledByteBuffer.<init>(ByteBufferSlicePool.java:184)
16:54:30,533 ERROR [stderr] (Finalizer) 	at org.xnio.ByteBufferSlicePool.allocate(ByteBufferSlicePool.java:135)
16:54:30,533 ERROR [stderr] (Finalizer) 	at org.jboss.remoting3.remote.RemoteConnection.allocate(RemoteConnection.java:75)
16:54:30,533 ERROR [stderr] (Finalizer) 	at org.jboss.remoting3.remote.RemoteReadListener.handleEvent(RemoteReadListener.java:70)
16:54:30,533 ERROR [stderr] (Finalizer) 	at org.jboss.remoting3.remote.RemoteReadListener.handleEvent(RemoteReadListener.java:45)
16:54:30,534 ERROR [stderr] (Finalizer) 	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
16:54:30,534 ERROR [stderr] (Finalizer) 	at org.xnio.channels.TranslatingSuspendableChannel.handleReadable(TranslatingSuspendableChannel.java:199)
16:54:30,534 ERROR [stderr] (Finalizer) 	at org.xnio.channels.TranslatingSuspendableChannel$1.handleEvent(TranslatingSuspendableChannel.java:113)
16:54:30,534 ERROR [stderr] (Finalizer) 	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
16:54:30,534 ERROR [stderr] (Finalizer) 	at org.xnio.ChannelListeners$DelegatingChannelListener.handleEvent(ChannelListeners.java:1092)
16:54:30,534 ERROR [stderr] (Finalizer) 	at org.xnio.ChannelListeners.invokeChannelListener(ChannelListeners.java:92)
16:54:30,534 ERROR [stderr] (Finalizer) 	at org.xnio.conduits.ReadReadyHandler$ChannelListenerHandler.readReady(ReadReadyHandler.java:66)
16:54:30,534 ERROR [stderr] (Finalizer) 	at org.xnio.nio.NioSocketConduit.handleReady(NioSocketConduit.java:87)
16:54:30,534 ERROR [stderr] (Finalizer) 	at org.xnio.nio.WorkerThread.run(WorkerThread.java:539)

> Memory leak in org.xnio.ByteBufferSlicePool
> -------------------------------------------
>
>                 Key: WFLY-3834
>                 URL: https://issues.jboss.org/browse/WFLY-3834
>             Project: WildFly
>          Issue Type: Bug
>          Components: Domain Management
>    Affects Versions: 8.1.0.Final
>            Reporter: Sergey Lisovoy
>              Labels: memory_leak, memoryleak
>
> I have a simple thread that monitor remote wildfly process status. After some time it fail with OutOfMemory exception.
> I wrote simple exsample how to reproduce its error:
> {code:java}
> package ru.kamis.tests.xniomemoryleaks;
> import org.jboss.as.controller.client.ModelControllerClient;
> import org.jboss.as.controller.client.helpers.Operations;
> import org.jboss.dmr.ModelNode;
> public class OutOfMemoryDemo {
> 	public static void main(String[] args) throws Exception {
> 		
> 		for(int i=0; i<1000000; i++) {
> 			ModelControllerClient client = null;
> 			client = ModelControllerClient.Factory.create("localhost", 9990);
> 			
> 			ModelNode operation = Operations.createReadAttributeOperation(new ModelNode().setEmptyList(), "server-state");
> 			client.execute(operation);
> 			
> 			client.close();
> 			
> 			if(i % 1000 == 0) {
> 				System.out.println("Processed: " + i);
> 			}
> 		}
> 	}
> }
> {code}
> Program produces folowing output: 
> {noformat}
> сен 09, 2014 2:33:20 PM org.xnio.Xnio <clinit>
> INFO: XNIO version 3.2.2.Final
> сен 09, 2014 2:33:20 PM org.xnio.nio.NioXnio <clinit>
> INFO: XNIO NIO Implementation Version 3.2.2.Final
> сен 09, 2014 2:33:20 PM org.jboss.remoting3.EndpointImpl <clinit>
> INFO: JBoss Remoting version 4.0.3.Final
> Processed: 0
> Processed: 1000
> Processed: 2000
> Processed: 3000
> Processed: 4000
> Exception in thread "main" java.lang.OutOfMemoryError: Java heap space
> 	at java.lang.String.toCharArray(String.java:2746)
> 	at sun.net.www.ParseUtil.encodePath(ParseUtil.java:107)
> 	at sun.misc.URLClassPath$JarLoader.checkResource(URLClassPath.java:757)
> 	at sun.misc.URLClassPath$JarLoader.getResource(URLClassPath.java:842)
> 	at sun.misc.URLClassPath.getResource(URLClassPath.java:199)
> 	at java.net.URLClassLoader$1.run(URLClassLoader.java:358)
> 	at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
> 	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:308)
> 	at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
> 	at org.jboss.as.protocol.ProtocolConnectionUtils.connectSync(ProtocolConnectionUtils.java:119)
> 	at org.jboss.as.protocol.ProtocolConnectionManager$EstablishingConnection.connect(ProtocolConnectionManager.java:256)
> 	at org.jboss.as.protocol.ProtocolConnectionManager.connect(ProtocolConnectionManager.java:70)
> 	at org.jboss.as.protocol.mgmt.FutureManagementChannel$Establishing.getChannel(FutureManagementChannel.java:204)
> 	at org.jboss.as.controller.client.impl.RemotingModelControllerClient.getOrCreateChannel(RemotingModelControllerClient.java:148)
> 	at org.jboss.as.controller.client.impl.RemotingModelControllerClient$1.getChannel(RemotingModelControllerClient.java:67)
> 	at org.jboss.as.protocol.mgmt.ManagementChannelHandler.executeRequest(ManagementChannelHandler.java:117)
> 	at org.jboss.as.protocol.mgmt.ManagementChannelHandler.executeRequest(ManagementChannelHandler.java:92)
> 	at org.jboss.as.controller.client.impl.AbstractModelControllerClient.executeRequest(AbstractModelControllerClient.java:236)
> 	at org.jboss.as.controller.client.impl.AbstractModelControllerClient.execute(AbstractModelControllerClient.java:141)
> 	at org.jboss.as.controller.client.impl.AbstractModelControllerClient.executeForResult(AbstractModelControllerClient.java:127)
> 	at org.jboss.as.controller.client.impl.AbstractModelControllerClient.execute(AbstractModelControllerClient.java:71)
> 	at ru.kamis.tests.xniomemoryleaks.OutOfMemoryDemo.main(OutOfMemoryDemo.java:15)
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> сен 09, 2014 2:35:20 PM org.jboss.as.controller.client.impl.RemotingModelControllerClient finalize
> WARN: JBAS010600: Closing leaked controller client
> JBAS010649: Allocation stack trace:
> 	at java.lang.Thread.getStackTrace(Thread.java:1589)
> 	at org.jboss.as.controller.client.impl.RemotingModelControllerClient.<init>(RemotingModelControllerClient.java:76)
> 	at org.jboss.as.controller.client.ModelControllerClient$Factory.create(ModelControllerClient.java:353)
> 	at org.jboss.as.controller.client.ModelControllerClient$Factory.create(ModelControllerClient.java:200)
> 	at ru.kamis.tests.xniomemoryleaks.OutOfMemoryDemo.main(OutOfMemoryDemo.java:12)
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> Exception in thread "RMI TCP Connection(idle)" java.lang.OutOfMemoryError: Java heap space
> {noformat}
> Used libraries:
> {code:xml}
> <dependency>
> 	<groupId>org.wildfly</groupId>
> 	<artifactId>wildfly-controller-client</artifactId>
> 	<version>8.1.0.Final</version>
> </dependency>
> {code}
> The same bug is reproduced on other xnio versions: 3.2.3.Final, 3.3.0.Beta2



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