[jboss-user] [JBoss Portal] - Memory leak in JBoss portal 2.4

sandeeppujar do-not-reply at jboss.com
Wed Sep 27 16:35:00 EDT 2006

Version: Jboss Portal 2.4.0

We suspect possible memory leak in this release. 
We did memory profiling for this version using Jprobe. Below is a detailed memory report.

Summary of profiling:

Test details:
1. A simple page with only one portlet (user portlet) was created and was hit repeatedly using JMeter.
2. A snap shot (SNAP1) was taken when the Jboss server was up and was taking requests. Memory was around 60MB mark
3. Total requests around 24,000. Total time: 30 mins	
4. A snap shot (SNAP2) was taken again, when memory was at 90MB mark. 
5. Forced GC and another snap shot (SNAP3)taken. After GC the memory usage came done, but there was still a considerable increase.80 MB

Has anybody seen this issue ?

Here are the differences in memory in Snap shots taken.

Diffrence between SNAP1 and SNAP2

Package          Class                     Count             Memory  
                      Overall Difference  595,775           28,330,440  
java.util  Hashtable$Entry [ ]        66,697 (huge)   3,730,832 (huge)  
java.util  HashMap$Entry [ ]        39,780 (79.3%)  3,422,328 (82.2%) 

Diffrence between SNAP1 and SNAP3
Package          Class                     Count             Memory  
                      Overall Difference  442,350            21,832,800   
java.util  Hashtable$Entry [ ]        53,212  (huge)   2,975,672 (huge)  
java.util  HashMap$Entry [ ]        19,177  (79.3%)  2,538,056  (82.2%) 

I can send the snap shot difference files if need be, I could not find a quick way to put the files here.


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