There were memory leak problems with earlier versions of Java. You
should upgrade to Java 6_30.
Lance
On 01/02/2013 05:26 AM, Alon Muchnick wrote:
Hello All ,
we are using Lucune 3.6.2 in our web application on tomcat 5.5 and recently
we started testing our application on tomcat 7, unfortunately we seem to
encounter a memory link in Lucune's CloseableThreadLocal class , any help
with solving the below issue would be much appreciated.
we are using RAMDirectory for our Indexes , while testing the application
on tomcat 7 we noticed that there is a memory leak in our application ,
after taking a heap dump we can see the memory leak is in the:
Type |Name |Value
------------------------------------------------------------
ref | index | org.apache.lucene.store.RAMDirectory --->
------------------------------------------------------------
------------------------------------------------------------------------
ref | core |
org.apache.lucene.index.SegmentReader$CoreReaders --->
------------------------------------------------------------------------
--------------------------------------------------------------
ref | tis |
org.apache.lucene.index.TermInfosReader --->
--------------------------------------------------------------
-----------------------------------------------------------------------------
ref | threadResources | org.apache.lucene.util.CloseableThreadLocal
--->
-----------------------------------------------------------------------------
--------------------------------------------
ref | hardRefs | java.util.HashMap @ 0x9d566938
--------------------------------------------
i guess the HashMap is used for caching purposes and it hold entries where
the key is a thread name and the value is a
org.apache.lucene.index.TermInfosReader$ThreadResources object .
*even when i stop new incoming connection to the application , tomcat
closes all the active threads and a GC is run the above map size is not
reduced and GC cannot reclaim the heap space .
*
the problem looks some what similar to LUCENE-3841
https://issues.apache.org/jira/browse/LUCENE-3841
but we are no using SnowballAnalyzer .
( i checked the code and made sure the hardRefs map is a WeakHashMap )
our JVM is :
OpenJDK 64-Bit Server VM ,
java.runtime.version1.6.0_20-b20
one again any help would be much appreciated.
thanks
Alon
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