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https://issues.apache.org/jira/browse/HBASE-1495?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12719084#action_12719084
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stack commented on HBASE-1495:
------------------------------
Here is example from logs of item 1. that would seem to indicate the issue is
in Scanners. I've instrumented meta scanner so that on each next, I print out
what was found. Immediately, I do a get on the row and I print that too.
Usually the two match. When they don't is when I have issue:
{code}
794 2009-06-12 22:41:18,377 [RegionManager.metaScanner] INFO
org.apache.hadoop.hbase.master.BaseScanner: REMOVE NEXT VALUES
keyvalues={TestTable,,1244846310969/info:regioninfo/1244846397895/Put/vlen=277,
TestTable,,1244846310969/info:server/1244846319501/Put/vle n=19,
TestTable,,1244846310969/info:serverstartcode/1244846319501/Put/vlen=8,
TestTable,,1244846310969/info:splitA/1244846397895/Put/vlen=277,
TestTable,,1244846310969/info:splitB/1244846397895/Put/vlen=297}
795 2009-06-12 22:41:18,379 [RegionManager.metaScanner] INFO
org.apache.hadoop.hbase.master.BaseScanner: REMOVE GET
keyvalues={TestTable,,1244846310969/historian:assignment/1244846315138/Put/vlen=71,
TestTable,,1244846310969/historian:compaction/1244846393353/Pu t/vlen=36,
TestTable,,1244846310969/historian:open/1244846319510/Put/vlen=51,
TestTable,,1244846310969/historian:split/1244846312701/Put/vlen=43,
TestTable,,1244846310969/info:regioninfo/1244846397895/Put/vlen=277,
TestTable,,1244846310969/info:server/124484 6319501/Put/vlen=19,
TestTable,,1244846310969/info:serverstartcode/1244846319501/Put/vlen=8,
TestTable,,1244846310969/info:splitA/1244846397895/Put/vlen=277,
TestTable,,1244846310969/info:splitB/1244846397895/Put/vlen=297}
{code}
When above scan finishes, is when we remove splitA. On next meta scan, I see
this:
{code}
840 2009-06-12 22:41:28,390 [RegionManager.metaScanner] INFO
org.apache.hadoop.hbase.master.BaseScanner: REMOVE NEXT VALUES
keyvalues={TestTable,,1244846310969/info:regioninfo/1244846397895/Put/vlen=277,
TestTable,,1244846310969/info:server/1244846319501/Put/vle n=19,
TestTable,,1244846310969/info:serverstartcode/1244846319501/Put/vlen=8}
841 2009-06-12 22:41:28,403 [RegionManager.metaScanner] INFO
org.apache.hadoop.hbase.master.BaseScanner: REMOVE GET
keyvalues={TestTable,,1244846310969/historian:assignment/1244846315138/Put/vlen=71,
TestTable,,1244846310969/historian:compaction/1244846393353/Pu t/vlen=36,
TestTable,,1244846310969/historian:open/1244846319510/Put/vlen=51,
TestTable,,1244846310969/historian:split/1244846312701/Put/vlen=43,
TestTable,,1244846310969/info:regioninfo/1244846397895/Put/vlen=277,
TestTable,,1244846310969/info:server/124484 6319501/Put/vlen=19,
TestTable,,1244846310969/info:serverstartcode/1244846319501/Put/vlen=8,
TestTable,,1244846310969/info:splitB/1244846397895/Put/vlen=297}
{code}
Above, the splitB is present in the Get but not in the Scan next.
> IllegalArgumentException in halfhfilereader#next
> ------------------------------------------------
>
> Key: HBASE-1495
> URL: https://issues.apache.org/jira/browse/HBASE-1495
> Project: Hadoop HBase
> Issue Type: Bug
> Reporter: stack
> Fix For: 0.20.0
>
> Attachments: 1495.patch
>
>
> From posix4e up on IRC
> {code}
> #
> 2009-06-07 20:22:33,367 ERROR
> org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction failed
> for region t3,*******************,1244420117045
> #
> java.lang.IllegalArgumentException
> #
> at java.nio.Buffer.position(Buffer.java:218)
> #
> at
> org.apache.hadoop.hbase.io.hfile.HFile$Reader$Scanner.next(HFile.java:1072)
> #
> at
> org.apache.hadoop.hbase.io.HalfHFileReader$1.next(HalfHFileReader.java:108)
> #
> at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.next(StoreFileScanner.java:52)
> #
> at
> org.apache.hadoop.hbase.regionserver.KeyValueHeap.next(KeyValueHeap.java:79)
> #
> at
> org.apache.hadoop.hbase.regionserver.MinorCompactingStoreScanner.next(MinorCompactingSto
> #
> reScanner.java:101)
> #
> at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:849)
> #
> at org.apache.hadoop.hbase.regionserver.Store.compact(Store.java:714)
> #
> at
> org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:766)
> #
> at
> org.apache.hadoop.hbase.regionserver.HRegion.compactStores(HRegion.java:723)
> #
> at
> org.apache.hadoop.hbase.regionserver.CompactSplitThread.run(CompactSplitThread.java:105)
> {code}
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