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https://issues.apache.org/jira/browse/HADOOP-1872?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12534991
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Doug Cutting commented on HADOOP-1872:
--------------------------------------
Here's the stack dump.
{noformat}
[junit] "main" prio=10 tid=0x0805a800 nid=0xbbe in Object.wait()
[0xb7da1000..0xb7da2208]
[junit] java.lang.Thread.State: WAITING (on object monitor)
[junit] at java.lang.Object.wait(Native Method)
[junit] - waiting on <0x81428d58> (a java.util.HashMap)
[junit] at java.lang.Object.wait(Object.java:485)
[junit] at
org.apache.hadoop.hbase.HRegion.waitOnRowLocks(HRegion.java:1538)
[junit] - locked <0x81428d58> (a java.util.HashMap)
[junit] at org.apache.hadoop.hbase.HRegion.close(HRegion.java:384)
[junit] at org.apache.hadoop.hbase.HRegion.close(HRegion.java:344)
[junit] at
org.apache.hadoop.hbase.TestCompaction.tearDown(TestCompaction.java:55)
[junit] at junit.framework.TestCase.runBare(TestCase.java:130)
[junit] at junit.framework.TestResult$1.protect(TestResult.java:106)
[junit] at junit.framework.TestResult.runProtected(TestResult.java:124)
[junit] at junit.framework.TestResult.run(TestResult.java:109)
[junit] at junit.framework.TestCase.run(TestCase.java:118)
[junit] at junit.framework.TestSuite.runTest(TestSuite.java:208)
[junit] at junit.framework.TestSuite.run(TestSuite.java:203)
[junit] at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.run(JUnitTestRunner.java:297)
[junit] at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.launch(JUnitTestRunner.java:672)
[junit] at
org.apache.tools.ant.taskdefs.optional.junit.JUnitTestRunner.main(JUnitTestRunner.java:567)
{noformat}
No other user threads running.
> [hbase] TestCompaction assertions fail on some hosts
> ----------------------------------------------------
>
> Key: HADOOP-1872
> URL: https://issues.apache.org/jira/browse/HADOOP-1872
> Project: Hadoop
> Issue Type: Bug
> Components: contrib/hbase
> Reporter: stack
> Assignee: stack
> Attachments: samepatchdifferentname.patch, testcompaction.patch
>
>
> Changes to TestCompaction introduced in hadoop-1768 passed an hudson build
> (#722) but reports on the hadoop irc have them failing on an an hp+ubuntu box:
> {code}
> cutting> it's nothing fancy. /proc/cpuinfo shows "Intel(R) Pentium(R) 4
> CPU 3.20GHz".
> <buenaventura> Thats single-cpu...
> <cutting> yep
> <cutting> 1GB of ram. bog standard pc.
> <cutting> running java 5, not java 6, if that matters.
> {code}
> (Failed also w/ java6).
> The assertion that fails is count of row versions after a compaction and
> flush. There are usually 4 -- the 3 from stores and one that is in a flush
> that happened 'concurrent' to the compaction -- but there can be 3 only (the
> maximum for a column) if non-intuitively the compaction thread starts after
> the flush finishes which can happen with certain jvm schedulers (hudson is
> one such).
> I commented out the assertions to get the build working again. This issue is
> about adding them back in again in a manner that has them working on hudson
> and the bog-standard hp+ubuntu.
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