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From "Paul Querna (JIRA)" <j...@apache.org>
Subject [jira] Created: (CASSANDRA-885) OOM on Commit log Replay
Date Fri, 12 Mar 2010 20:51:27 GMT
OOM on Commit log Replay
------------------------

                 Key: CASSANDRA-885
                 URL: https://issues.apache.org/jira/browse/CASSANDRA-885
             Project: Cassandra
          Issue Type: Bug
            Reporter: Paul Querna
             Fix For: 0.5


Running 0.5.

We had a node reboot, and when it came back up, it was unable to replay the commit logs, it
would OOM every time.

We upped the max heap to 6 gigs, but it didn't help.

I have a heap dump and have it opened in Eclipse MAT.

Anything specific I should pull out?

Class Name                                                                               
   | Shallow Heap | Retained Heap | Percentage 
----------------------------------------------------------------------------------------------------------------------------------------
                                                                                         
   |              |               |            
org.apache.cassandra.concurrent.DebuggableThreadPoolExecutor @ 0x7fad06454f48            
   |          112 | 2,604,583,312 |     84.35% 
|- java.util.concurrent.LinkedBlockingQueue @ 0x7fad06405b78                             
   |           80 | 2,604,579,864 |     84.35% 
|- java.util.HashSet @ 0x7fad071b2110                                                    
   |           24 |         2,952 |      0.00% 
|- java.lang.String @ 0x7fad071b3588  org.apache.cassandra.concurrent:type=ROW-MUTATION-STAGE|
          40 |           176 |      0.00% 
|- org.apache.cassandra.concurrent.NamedThreadFactory @ 0x7fad0714e998                   
   |           32 |            56 |      0.00% 
|- java.util.concurrent.locks.ReentrantLock$NonfairSync @ 0x7fad0722b570                 
   |           48 |            48 |      0.00% 
|- java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject @ 0x7fad071b3560
   |           40 |            40 |      0.00% 
|- java.util.concurrent.atomic.AtomicInteger @ 0x7fad071b20e0                            
   |           24 |            24 |      0.00% 
|- java.util.concurrent.locks.ReentrantLock @ 0x7fad071b20f8                             
   |           24 |            24 |      0.00% 
|- java.util.concurrent.ThreadPoolExecutor$CallerRunsPolicy @ 0x7fad071b2128             
   |           16 |            16 |      0.00% 
'- Total: 9 entries                                                                      
   |              |               |            
org.apache.cassandra.db.ColumnFamilyStore @ 0x7fad063b3390                               
   |          104 |    95,871,520 |      3.10% 
org.apache.cassandra.db.ColumnFamilyStore @ 0x7fad063b3460                               
   |          104 |    82,056,536 |      2.66% 
org.apache.cassandra.db.ColumnFamilyStore @ 0x7fad063b3188                               
   |          104 |    72,894,176 |      2.36% 
org.apache.cassandra.db.ColumnFamilyStore @ 0x7fad06331798                               
   |          104 |    45,394,360 |      1.47% 
org.apache.cassandra.db.ColumnFamilyStore @ 0x7fad06331660                               
   |          104 |    33,895,560 |      1.10% 
java.lang.Thread @ 0x7fad060e2320  main Native Stack, Thread                             
   |          168 |    33,573,328 |      1.09% 
org.apache.cassandra.db.ColumnFamilyStore @ 0x7fad06287e50                               
   |          104 |    33,528,680 |      1.09% 
org.apache.cassandra.db.ColumnFamilyStore @ 0x7fad063b3530                               
   |          104 |    33,423,720 |      1.08% 
org.apache.cassandra.db.ColumnFamilyStore @ 0x7fad063b32c0                               
   |          104 |    20,221,624 |      0.65% 
org.apache.cassandra.db.Memtable @ 0x7fad06410120                                        
   |           96 |     9,383,880 |      0.30% 
org.apache.cassandra.db.ColumnFamily @ 0x7fad33df3690                                    
   |           80 |     1,190,016 |      0.04% 
org.apache.cassandra.io.SSTableReader @ 0x7fad0653a4a0                                   
   |           72 |       587,008 |      0.02% 
org.apache.cassandra.io.SSTableReader @ 0x7fad06c41ef0                                   
   |           72 |       543,552 |      0.02% 
org.apache.cassandra.io.SSTableReader @ 0x7fad06456450                                   
   |           72 |       541,320 |      0.02% 
Total: 15 of 49,239 entries                                                              
   |              |               |            
----------------------------------------------------------------------------------------------------------------------------------------


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