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https://issues.apache.org/jira/browse/HBASE-5659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420320#comment-13420320
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Lars Hofhansl edited comment on HBASE-5659 at 7/22/12 8:29 PM:
---------------------------------------------------------------

So then here's a new theory: The test produces > 1000 flushes. Compactions 
can't keep up, hence a scan will need to merge all these files together. The 
limit for the test is 1024 open files.
I would still like to include the first patch.
                
      was (Author: lhofhansl):
    So then here's a new theory: The produces > 1000 flushes. Compactions can't 
keep up, hence a scan will need to merge all these files together. The limit 
for the test is 1024 open files.
I would still like to include the first patch.
                  
> TestAtomicOperation.testMultiRowMutationMultiThreads is still failing 
> occasionally
> ----------------------------------------------------------------------------------
>
>                 Key: HBASE-5659
>                 URL: https://issues.apache.org/jira/browse/HBASE-5659
>             Project: HBase
>          Issue Type: Sub-task
>            Reporter: Lars Hofhansl
>            Assignee: Lars Hofhansl
>            Priority: Minor
>             Fix For: 0.96.0, 0.94.2
>
>         Attachments: 5659.txt
>
>
> See run here: 
> https://builds.apache.org/job/PreCommit-HBASE-Build/1318//testReport/org.apache.hadoop.hbase.regionserver/TestAtomicOperation/testMultiRowMutationMultiThreads/
> {quote}
> 2012-03-27 04:36:12,627 DEBUG [Thread-118] regionserver.StoreScanner(499): 
> Storescanner.peek() is changed where before = 
> rowB/colfamily11:qual1/7202/Put/vlen=6/ts=7922,and after = 
> rowB/colfamily11:qual1/7199/DeleteColumn/vlen=0/ts=0
> 2012-03-27 04:36:12,629 INFO  [Thread-121] regionserver.HRegion(1558): 
> Finished memstore flush of ~2.9k/2952, currentsize=1.6k/1640 for region 
> testtable,,1332822963417.7cd30e219714cfc5e91f69def66e7f81. in 14ms, 
> sequenceid=7927, compaction requested=true
> 2012-03-27 04:36:12,629 DEBUG [Thread-126] 
> regionserver.TestAtomicOperation$2(362): flushing
> 2012-03-27 04:36:12,630 DEBUG [Thread-126] regionserver.HRegion(1426): 
> Started memstore flush for 
> testtable,,1332822963417.7cd30e219714cfc5e91f69def66e7f81., current region 
> memstore size 1.9k
> 2012-03-27 04:36:12,630 DEBUG [Thread-126] regionserver.HRegion(1474): 
> Finished snapshotting 
> testtable,,1332822963417.7cd30e219714cfc5e91f69def66e7f81., commencing wait 
> for mvcc, flushsize=1968
> 2012-03-27 04:36:12,630 DEBUG [Thread-126] regionserver.HRegion(1484): 
> Finished snapshotting, commencing flushing stores
> 2012-03-27 04:36:12,630 DEBUG [Thread-126] util.FSUtils(153): Creating 
> file=/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/trunk/target/test-data/b9091c3c-961e-4035-850a-83ad14d517cc/TestAtomicOperationtestMultiRowMutationMultiThreads/testtable/7cd30e219714cfc5e91f69def66e7f81/.tmp/61954619003e469baf1a34be5ff2ec57
>  with permission=rwxrwxrwx
> 2012-03-27 04:36:12,631 DEBUG [Thread-126] hfile.HFileWriterV2(143): 
> Initialized with CacheConfig:enabled [cacheDataOnRead=true] 
> [cacheDataOnWrite=false] [cacheIndexesOnWrite=false] 
> [cacheBloomsOnWrite=false] [cacheEvictOnClose=false] [cacheCompressed=false]
> 2012-03-27 04:36:12,631 INFO  [Thread-126] 
> regionserver.StoreFile$Writer(997): Delete Family Bloom filter type for 
> /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/trunk/target/test-data/b9091c3c-961e-4035-850a-83ad14d517cc/TestAtomicOperationtestMultiRowMutationMultiThreads/testtable/7cd30e219714cfc5e91f69def66e7f81/.tmp/61954619003e469baf1a34be5ff2ec57:
>  CompoundBloomFilterWriter
> 2012-03-27 04:36:12,632 INFO  [Thread-126] 
> regionserver.StoreFile$Writer(1220): NO General Bloom and NO DeleteFamily was 
> added to HFile 
> (/home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/trunk/target/test-data/b9091c3c-961e-4035-850a-83ad14d517cc/TestAtomicOperationtestMultiRowMutationMultiThreads/testtable/7cd30e219714cfc5e91f69def66e7f81/.tmp/61954619003e469baf1a34be5ff2ec57)
>  
> 2012-03-27 04:36:12,632 INFO  [Thread-126] regionserver.Store(770): Flushed , 
> sequenceid=7934, memsize=1.9k, into tmp file 
> /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/trunk/target/test-data/b9091c3c-961e-4035-850a-83ad14d517cc/TestAtomicOperationtestMultiRowMutationMultiThreads/testtable/7cd30e219714cfc5e91f69def66e7f81/.tmp/61954619003e469baf1a34be5ff2ec57
> 2012-03-27 04:36:12,632 DEBUG [Thread-126] regionserver.Store(795): Renaming 
> flushed file at 
> /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/trunk/target/test-data/b9091c3c-961e-4035-850a-83ad14d517cc/TestAtomicOperationtestMultiRowMutationMultiThreads/testtable/7cd30e219714cfc5e91f69def66e7f81/.tmp/61954619003e469baf1a34be5ff2ec57
>  to 
> /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/trunk/target/test-data/b9091c3c-961e-4035-850a-83ad14d517cc/TestAtomicOperationtestMultiRowMutationMultiThreads/testtable/7cd30e219714cfc5e91f69def66e7f81/colfamily11/61954619003e469baf1a34be5ff2ec57
> 2012-03-27 04:36:12,634 INFO  [Thread-126] regionserver.Store(818): Added 
> /home/jenkins/jenkins-slave/workspace/PreCommit-HBASE-Build/trunk/target/test-data/b9091c3c-961e-4035-850a-83ad14d517cc/TestAtomicOperationtestMultiRowMutationMultiThreads/testtable/7cd30e219714cfc5e91f69def66e7f81/colfamily11/61954619003e469baf1a34be5ff2ec57,
>  entries=12, sequenceid=7934, filesize=1.3k
> 2012-03-27 04:36:12,642 DEBUG [Thread-118] 
> regionserver.TestAtomicOperation$2(392): []
> Exception in thread "Thread-118" junit.framework.AssertionFailedError at 
> junit.framework.Assert.fail(Assert.java:48)
>       at junit.framework.Assert.fail(Assert.java:56)
>       at 
> org.apache.hadoop.hbase.regionserver.TestAtomicOperation$2.run(TestAtomicOperation.java:394)
> 2012-03-27 04:36:12,643 INFO  [Thread-126] regionserver.HRegion(1558): 
> Finished memstore flush of ~1.9k/1968, currentsize=1.3k/1312 for region 
> testtable,,1332822963417.7cd30e219714cfc5e91f69def66e7f81. in 14ms, 
> sequenceid=7934, compaction requested=true
> {quote}
> I think this issue is different from parent.

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