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From Umesh Prasad <umesh.i...@gmail.com>
Subject Solr Core Reload causing JVM Memory Leak through FieldCache/LRUCache/LFUCache
Date Fri, 15 Nov 2013 08:58:07 GMT
Hi All,
    We are seeing memory leaks in our Search application whenever core
reload happens after replication.
   We are using Solr 3.6.2 and I have observed this consistently on all
servers.

The leak suspect analysis from MAT is attached with the mail.

 <#>  Problem Suspect 1

One instance of *"org.apache.lucene.search.FieldCacheImpl"*loaded by
*"org.apache.catalina.loader.WebappClassLoader
@ 0x7f7b0a5b8b30"* occupies *8,726,099,312 (35.49%)* bytes. The memory is
accumulated in one instance of*"java.util.HashMap$Entry[]"* loaded by *"<system
class loader>"*.

*Keywords*
org.apache.catalina.loader.WebappClassLoader @ 0x7f7b0a5b8b30
java.util.HashMap$Entry[]
org.apache.lucene.search.FieldCacheImpl

Problem Suspect 2

69 instances of *"org.apache.solr.util.ConcurrentLRUCache"*, loaded by
*"org.apache.catalina.loader.WebappClassLoader
@ 0x7f7b0a5b8b30"* occupy *6,309,187,392 (25.66%)* bytes.

Biggest instances:

   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7fe74ef120 - 755,575,672
   (3.07%) bytes.
   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7e74b7a068 - 728,731,344
   (2.96%) bytes.
   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7d0a6bd1b8 - 711,828,392
   (2.90%) bytes.
   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7c6c12e800 - 708,657,624
   (2.88%) bytes.
   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7fcb092058 - 568,473,352
   (2.31%) bytes.
   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7f268cb2f0 - 568,400,040
   (2.31%) bytes.
   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7e31b60c58 - 544,078,600
   (2.21%) bytes.
   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7e65c2b2d8 - 489,578,480
   (1.99%) bytes.
   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7d81ea8538 - 467,833,720
   (1.90%) bytes.
   - org.apache.solr.util.ConcurrentLRUCache @ 0x7f7f31996508 - 444,383,992
   (1.81%) bytes.



*Keywords*
org.apache.catalina.loader.WebappClassLoader @ 0x7f7b0a5b8b30
org.apache.solr.util.ConcurrentLRUCache
Details ยป <pages/24.html>

194 instances of *"org.apache.solr.util.ConcurrentLFUCache"*, loaded
by *"org.apache.catalina.loader.WebappClassLoader
@ 0x7f7b0a5b8b30"* occupy *4,583,727,104 (18.64%)* bytes.

Biggest instances:

   - org.apache.solr.util.ConcurrentLFUCache @ 0x7f7cdd4735a0 - 410,628,176
   (1.67%) bytes.
   - org.apache.solr.util.ConcurrentLFUCache @ 0x7f7c7d48e180 - 390,690,864
   (1.59%) bytes.
   - org.apache.solr.util.ConcurrentLFUCache @ 0x7f7f1edfd008 - 348,193,312
   (1.42%) bytes.
   - org.apache.solr.util.ConcurrentLFUCache @ 0x7f7f37b01990 - 340,595,920
   (1.39%) bytes.
   - org.apache.solr.util.ConcurrentLFUCache @ 0x7f7fe02d8dd8 - 274,611,632
   (1.12%) bytes.
   - org.apache.solr.util.ConcurrentLFUCache @ 0x7f7fa9dcfb20 - 253,848,232
   (1.03%) bytes.



*Keywords*
org.apache.catalina.loader.WebappClassLoader @ 0x7f7b0a5b8b30
org.apache.solr.util.ConcurrentLFUCache


---
Thanks & Regards
Umesh Prasad

SDE @ Flipkart  : The Online Megastore at your doorstep ..

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