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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (AMQ-4182) Memory Leak for ActiveMQBytesMessage with Compression as true
Date Thu, 29 Nov 2012 21:12:58 GMT

    [ https://issues.apache.org/jira/browse/AMQ-4182?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13506793#comment-13506793
] 

Timothy Bish commented on AMQ-4182:
-----------------------------------

You're welcome to submit a patch if you can see a reasonable solution to the issue you are
seeing. 
                
> Memory Leak for ActiveMQBytesMessage with Compression as true
> -------------------------------------------------------------
>
>                 Key: AMQ-4182
>                 URL: https://issues.apache.org/jira/browse/AMQ-4182
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: JMS client
>    Affects Versions: 5.5.1
>         Environment: Linux(Redhat 5.5), Windows 7
>            Reporter: Jeff Huang
>            Priority: Minor
>
> InflaterInputStream is supposed to close explicitly to release resource allocated by
its JNI methods. In ActiveMQBytesMessage, dataIn property is disposed simply without closing
it, which results in some weird memory leak that can't be detected from heap size. It can't
be controlled by -Xmx or -XX:MaxDirectMemorySize.
> Please run the following test program to verify the issue:
> import java.util.concurrent.TimeUnit;
> import javax.jms.BytesMessage;
> import javax.jms.Connection;
> import javax.jms.Session;
> import org.apache.activemq.ActiveMQConnectionFactory;
> import org.apache.activemq.command.ActiveMQBytesMessage;
> /**
>  * A simple test to verify memory leak in ActiveMQBytesMessage.
>  */
> public class Main
> {
>     public static void main(String[] args) throws Exception 
>     {
>         ActiveMQConnectionFactory connFactory = new ActiveMQConnectionFactory("vm://localhost");
>         connFactory.setUseCompression(true);
>         Connection conn = connFactory.createConnection();
>         Session session = conn.createSession(false, Session.AUTO_ACKNOWLEDGE);
>         BytesMessage message = session.createBytesMessage();
>         
>         message.writeBytes(new byte[1024]);
>         ActiveMQBytesMessage m = (ActiveMQBytesMessage)message;
>         if(!m.isCompressed())
>         {
>             throw new RuntimeException();
>         }
>         
>         
>         while (true)
>         {
>             for (int k = 0; k < 1024; ++k)
>             {
>                 message.reset();
>                 byte[] data = new byte[1024];
>                 message.readBytes(data);
>             }
>             TimeUnit.MILLISECONDS.sleep(10);
>         }
>     }
> }

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