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https://issues.apache.org/jira/browse/HBASE-1702?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12735098#action_12735098
]
Jonathan Gray commented on HBASE-1702:
--------------------------------------
There is an exception thrown that ROOT has been closed:
{noformat}
2009-07-24 09:53:24,841 FATAL [main] util.Merge(112): Merge failed
java.io.IOException: Region -ROOT-,,0 closed
at
org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1073)
at
org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1066)
at
org.apache.hadoop.hbase.util.MetaUtils.scanMetaRegion(MetaUtils.java:209)
at
org.apache.hadoop.hbase.util.MetaUtils.scanRootRegion(MetaUtils.java:195)
at org.apache.hadoop.hbase.util.Merge.mergeTwoRegions(Merge.java:241)
at org.apache.hadoop.hbase.util.Merge.run(Merge.java:108)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:79)
at
org.apache.hadoop.hbase.util.TestMergeTool.mergeAndVerify(TestMergeTool.java:175)
at
org.apache.hadoop.hbase.util.TestMergeTool.testMergeTool(TestMergeTool.java:253)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at junit.framework.TestCase.runTest(TestCase.java:154)
at junit.framework.TestCase.runBare(TestCase.java:127)
at junit.framework.TestResult$1.protect(TestResult.java:106)
at junit.framework.TestResult.runProtected(TestResult.java:124)
at junit.framework.TestResult.run(TestResult.java:109)
at junit.framework.TestCase.run(TestCase.java:118)
at junit.framework.TestSuite.runTest(TestSuite.java:208)
at junit.framework.TestSuite.run(TestSuite.java:203)
at
org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
at
org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
at
org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
{noformat}
Weird thing is, there are a number of successful merges prior to this failure.
But if you look above, ROOT was closed immediately after opening for some
unknown reason:
{noformat}
2009-07-24 09:53:23,060 DEBUG [main] regionserver.HRegion(1830): Opening
region: REGION => {NAME => '-ROOT-,,0', STARTKEY => '', ENDKEY => '', ENCODED
=> 70236052, TABLE => {{NAME => '-ROOT-', IS_ROOT => 'true', IS_META => 'true',
MEMSTORE_FLUSHSIZE => '16384', FAMILIES => [{NAME => 'info', COMPRESSION =>
'NONE', VERSIONS => '10', TTL => '2147483647', BLOCKSIZE => '8192', IN_MEMORY
=> 'false', BLOCKCACHE => 'true'}]}}
2009-07-24 09:53:23,060 DEBUG [main] regionserver.HRegion(265): Opening region
-ROOT-,,0, encoded=70236052
2009-07-24 09:53:23,075 DEBUG [main] regionserver.Store(386): loaded
/user/Administrator/-ROOT-/70236052/info/8350772430627555532,
isReference=false, sequence id=2, length=840, majorCompaction=false
2009-07-24 09:53:23,075 INFO [main] regionserver.HRegion(340): region
-ROOT-,,0/70236052 available; sequence id is 3
2009-07-24 09:53:23,075 INFO [main] regionserver.HRegion(770): Starting
compaction on region -ROOT-,,0
2009-07-24 09:53:23,091 INFO [main] regionserver.HRegion(785): compaction
completed on region -ROOT-,,0 in 0sec
2009-07-24 09:53:23,138 DEBUG [main] regionserver.HRegion(451): Closing
-ROOT-,,0: compactions & flushes disabled
2009-07-24 09:53:23,138 DEBUG [main] regionserver.HRegion(468): Updates
disabled for region, no outstanding scanners on -ROOT-,,0
2009-07-24 09:53:23,138 DEBUG [main] regionserver.HRegion(475): No more row
locks outstanding on region -ROOT-,,0
2009-07-24 09:53:23,138 DEBUG [main] regionserver.Store(451): closed info
2009-07-24 09:53:23,138 INFO [main] regionserver.HRegion(487): Closed -ROOT-,,0
{noformat}
And when we shutdown, we again see ROOT is already closed for some reason:
{noformat}
2009-07-24 09:53:24,888 DEBUG [main] regionserver.HRegion(451): Closing
.META.,,1: compactions & flushes disabled
2009-07-24 09:53:24,888 DEBUG [main] regionserver.HRegion(468): Updates
disabled for region, no outstanding scanners on .META.,,1
2009-07-24 09:53:24,888 DEBUG [main] regionserver.HRegion(475): No more row
locks outstanding on region .META.,,1
2009-07-24 09:53:24,888 DEBUG [main] regionserver.Store(451): closed historian
2009-07-24 09:53:24,888 DEBUG [main] regionserver.Store(451): closed info
2009-07-24 09:53:24,888 INFO [main] regionserver.HRegion(487): Closed .META.,,1
2009-07-24 09:53:24,888 WARN [main] regionserver.HRegion(442): region
-ROOT-,,0 already closed
{noformat}
> TestMergeUtil fails on trunk
> ----------------------------
>
> Key: HBASE-1702
> URL: https://issues.apache.org/jira/browse/HBASE-1702
> Project: Hadoop HBase
> Issue Type: Bug
> Affects Versions: 0.20.0
> Reporter: Jonathan Gray
> Priority: Critical
> Fix For: 0.20.0
>
>
> Last hudson reports a failed test on TestMergeUtil. Same failure when run
> locally.
> {noformat}
> junit.framework.AssertionFailedError: 'merging regions 0 and 1' failed
> at
> org.apache.hadoop.hbase.util.TestMergeTool.mergeAndVerify(TestMergeTool.java:178)
> at
> org.apache.hadoop.hbase.util.TestMergeTool.testMergeTool(TestMergeTool.java:253)
> {noformat}
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