[
http://jira.jboss.com/jira/browse/JBCACHE-31?page=comments#action_12314430 ]
Bela Ban commented on JBCACHE-31:
---------------------------------
Program to run is:
package org.jboss.cache.tests;
import org.jboss.cache.TreeCache;
import org.jboss.cache.PropertyConfigurator;
import java.util.Date;
import java.util.HashMap;
/**
* @author navin
*/
public class CacheMemTest {
public CacheMemTest(String num) throws Exception {
TreeCache cache=new TreeCache();
// cache.setCacheMode(TreeCache.REPL_ASYNC);
// cache.setClusterName("CacheTest");
PropertyConfigurator conf=new PropertyConfigurator();
conf.configure(cache, "async.xml");
cache.createService();
cache.startService();
new Thread(new PublishThread(cache, num, 1)).start();
new Thread(new PublishThread(cache, num, 2)).start();
new Thread(new PublishThread(cache, num, 3)).start();
}
public static void main(String[] args) throws Exception {
new CacheMemTest(args[0]);
}
public class PublishThread implements Runnable {
private TreeCache cache=null;
private int threadNum=0;
private String processNum=null;
public PublishThread(TreeCache cache, String processNum, int threadNum) {
this.cache=cache;
this.threadNum=threadNum;
this.processNum=processNum;
}
public void run() {
while(true) {
try {
System.out.println(processNum + "/" + threadNum);
cache.put(processNum + "/" + threadNum, "EXPIRY_TIME", new
Date(System.currentTimeMillis() + 5000));
HashMap testMap=new HashMap();
testMap.put("TIME_NAME", new Date(System.currentTimeMillis()) +
"_NAME");
testMap.put("TIME_HOST", new Date(System.currentTimeMillis()) +
"_HOST");
testMap.put("TIME_PORT", new Date(System.currentTimeMillis()) +
"_PORT");
testMap.put("TIME_THREAD_COUNT", new
Date(System.currentTimeMillis()) + "_100");
testMap.put("TIME_FREE_MEMORY", new
Date(System.currentTimeMillis()) + "_1024");
testMap.put("TIME_MZX_MEMORY", new
Date(System.currentTimeMillis()) + "_2048");
cache.put(processNum + "/" + threadNum, "STATISTICS", testMap);
Thread.sleep(500);
}
catch(Throwable t) {
System.out.println("Error in Thread" + threadNum + " : " + t);
t.printStackTrace();
}
}
}
}
}
> Out of memory problem
> ---------------------
>
> Key: JBCACHE-31
> URL: http://jira.jboss.com/jira/browse/JBCACHE-31
> Project: JBoss Cache
> Type: Bug
> Versions: 1.2
> Reporter: Bela Ban
> Assignee: Bela Ban
> Priority: Critical
> Fix For: 1.2.1
>
> Original Estimate: 1 week
> Remaining: 1 week
>
> I was able to reproduce the OOME using a simple java program using JBossCache.
> > >
> > >I have attached a java program "CacheMemTest.java" that mimicks our
> > >actual scenario (3 threads / process posting to the same JBossCache
> > >into the same node every time).
> > >
> > >I ran 5 instances of this program in different JVMs in the background.
> > >I passed numbers 1 to 5 as the arguments to the 5 programs (for the
> > >processNum).
> > >
> > >After about 3 hours, the program started throwing OOMEs.. The stack
> > >trace for each of them was :
> > >
> > >org.jboss.util.NestedRuntimeException: - nested throwable:
> > >(java.lang.OutOfMemoryError)
> > > at java.lang.Thread.run(Thread.java:552)
> > >Caused by: java.lang.OutOfMemoryError
> > >org.jboss.util.NestedRuntimeException: - nested throwable:
> > >(java.lang.OutOfMemoryError)
> > > at org.jboss.cache.TreeCache.invokeMethod(TreeCache.java:3184)
> > > at org.jboss.cache.TreeCache.put(TreeCache.java:1741)
> > > at org.jboss.cache.TreeCache.put(TreeCache.java:1724)
> > > at CacheMemTest$PublishThread.run(CacheMemTest.java:65)
> > >
> > >Is this a known problem? Any idea how I can go about debugging this
> > >problem?
> > >
> > >Navin
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