4 Replies Latest reply on Sep 12, 2014 11:24 AM by s.lisovoy

    Memory Leak in XNIO

    s.lisovoy
    s.lisovoy Sep 9, 2014 10:15 AM

      I have a simple thread that performs monitoring of remote wildfly process status. After some time it fail with OutOfMemory exception.

      I wrote simple exsample how to reproduce its error:

      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);
  }
  }

      Result output:

      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

      Used client version:

      <dependency>
  <groupId>org.wildfly</groupId>
  <artifactId>wildfly-controller-client</artifactId>
  <version>8.1.0.Final</version>
  </dependency>