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 Assignee: David Lloyd 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