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From "Antonio Carballo (JIRA)" <j...@apache.org>
Subject [jira] Created: (JCR-1037) Memory leak causing performance problems
Date Thu, 26 Jul 2007 20:47:03 GMT
Memory leak causing performance problems

                 Key: JCR-1037
                 URL: https://issues.apache.org/jira/browse/JCR-1037
             Project: Jackrabbit
          Issue Type: Bug
          Components: Jackrabbit API
    Affects Versions: 1.3, 1.2.3, 1.2.2, 1.2.1
         Environment: Tomcat 6.0, XP Pro w/1Gb
            Reporter: Antonio Carballo


We have been running tests on JCR v1.3 and v1.2.1 for the past two weeks. The system keeps
running out of memory after X number of documents are added. Our initial test consisted of
about 50 documents and gradually increased to about 150 documents. The size of the documents
ranged from 1K to 9MB. We later changed the test to consist of files with less than 1K in
length with the same result. Increasing the heap size delays the error but the outcome is
always the same (Servlet runs out of heap memory.)

Using JProbe we found a high number of references created by the caching sub-system (SessionItemStateManager.java,
SharedItemStateManager.java, LocalItemStateManager.java).  We changed the caching parameters
using CacheManager (min 64K - max 16MB). This change only delayed the error. Servlet eventually
runs out of heap memory.

We are more than happy to share our findings (even source code and test data) with the Jackrabbit
team. Please let us know how you wish to proceed.

Antonio Carballo

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