[jira] [Commented] (HBASE-9338) Test Big Linked List fails on Hadoop 2.1.0

["Elliott Clark (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-9338?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13756918#comment-13756918 ] 

Elliott Clark commented on HBASE-9338:
--------------------------------------

Still seeing this 100% of the time on out test cluster.

Running:
{code}
hbase org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList --monkey slowDeterministic Loop 5 12 25000000 IntegrationTestBigLinkedList 12
{code}

Fails every time.  Usually it will get through the first few iterations but it will fail before the 5th.  Resulting in:

{code}
	org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList$Verify$Counts
		REFERENCED=599327221
		UNDEFINED=336384
		UNREFERENCED=336384
{code}

{code}
	org.apache.hadoop.hbase.test.IntegrationTestBigLinkedList$Verify$Counts
		REFERENCED=899938580
		UNDEFINED=29048
		UNREFERENCED=32373
{code}


Disabling online schema change made Load and Verify pass.  However there is still something wrong.  I went through the MR output and the keys listed as undefined are really missing (going on the shell they are never returned).  So it looks like we are missing single links in the chain.

I've modified the job to produce a more usable client column.  I've used that to look at the logs for each attempt.  Nothing seems too much amiss in the logs.  Can someone run the same tests with a high number of iterations (Seems this always passes on the first loop) ?

                
> Test Big Linked List fails on Hadoop 2.1.0
> ------------------------------------------
>
>                 Key: HBASE-9338
>                 URL: https://issues.apache.org/jira/browse/HBASE-9338
>             Project: HBase
>          Issue Type: Bug
>          Components: test
>    Affects Versions: 0.96.0
>            Reporter: Elliott Clark
>            Assignee: Elliott Clark
>            Priority: Blocker
>             Fix For: 0.96.0
>
>         Attachments: HBASE-9338-0.patch
>
>


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