[jboss-jira] [JBoss JIRA] Created: (JBCACHE-709) Out of memory problem
Out of memory problem
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Key: JBCACHE-709
URL: http://jira.jboss.com/jira/browse/JBCACHE-709
Project: JBoss Cache
Issue Type: Bug
Security Level: Public (Everyone can see)
Affects Versions: 1.2.4SP2
Environment: Windows NT, Ecliplse IDE and Pentium 4 processor.
Reporter: Sudhakar Pandey
Assigned To: Manik Surtani
Priority: Critical
Problem:
~~~~~~~
While running the following testcase after entering 66666 records my system program is
getting hang.
Following is the description of program:
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
I am putting some String object in TreeCache, accessing it and then removing it from the
cache. I am doing this in a infinite loop.
Following is the eviction policy:
~~~~~~~~~~~~~~~~~~~~~~~
<attribute name="EvictionPolicyConfig">
<config>
<attribute
name="wakeUpIntervalSeconds">72000</attribute>
<!-- Cache wide default -->
<region name="/_default_">
<attribute name="maxNodes">500</attribute>
<attribute name="timeToLiveSeconds">180</attribute>
<!-- Maximum time an object is kept in cache regardless of idle time -->
<attribute name="maxAgeSeconds">7200</attribute>
</region>
<!-- yodlee wide default -->
<region name="/com/yodlee">
<attribute name="maxNodes">500</attribute>
<attribute name="timeToLiveSeconds">180</attribute>
<!-- Maximum time an object is kept in cache regardless of idle time -->
<attribute name="maxAgeSeconds">7200</attribute>
</region>
</config>
</attribute>
*IMPORTENT*: If I reduce the 'wakeUpIntervalSeconds' then there is no leak.
However, I can reduce this time coz it eats up lots of CPU.
I have attached the Tree Cache Configuration xml file also.
Program:
~~~~~~~
public void testTreeCache(){
TreeCache treeCache;
try {
treeCache = new TreeCache();
treeCache.setCacheMode(TreeCache.LOCAL);
// configure TreeCache
PropertyConfigurator config = new PropertyConfigurator();
config.configure(treeCache,
"com/yodlee/core/system/services/cacheservice/TreeCache.xml");
treeCache.startService();
String identifier = "Test/MemoryLeak/";
String key = "key";
String value = "JBoss Cache is a product designed to cache frequently accessed
Java objects in order to dramatically improve the performance of e-business applications.
By eliminating unnecessary database access, JBoss Cache decreases network traffic and
increases the scalability of applications.";
for(int i=0;;i++)
{
System.out.println("Putting key=" + (key +i));
treeCache.put(identifier, key +i, value);
System.out.println(treeCache.get(identifier, key + i));
System.out.println("Removing key=" + (key+i));
treeCache.remove(identifier, key + i);
}
//treeCache.stopService();
} catch (Exception e) {
MessageController.log(JBossCacheServiceImpl.class.getName(), 1,
ExceptionHelper.getExceptionStackTrace(e),
MessageController.FATAL);
throw new CoreException(ExceptionHelper.getExceptionStackTrace(e));
}
}
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