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https://issues.apache.org/jira/browse/HBASE-16012?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15328865#comment-15328865
]
Jingcheng Du commented on HBASE-16012:
--------------------------------------
Thanks for the patch [~zghaobac].
If exceptions occur when store scanner is instantiated, the heap in region is
empty, the instantiated store scanners cannot be closed properly in
region.close at that time. Do you want to address this in the patch?
> Major compaction can't work because left scanner read point in RegionServer
> ---------------------------------------------------------------------------
>
> Key: HBASE-16012
> URL: https://issues.apache.org/jira/browse/HBASE-16012
> Project: HBase
> Issue Type: Bug
> Components: Compaction, Scanners
> Affects Versions: 2.0.0, 0.94.27
> Reporter: Guanghao Zhang
> Attachments: HBASE-16012.patch
>
>
> When new RegionScanner, it will add a scanner read point in
> scannerReadPoints. But if we got a exception after add read point, the read
> point will keep in regions server and the delete after this mvcc number will
> never be compacted.
> Our hbase version is base 0.94. If it throws other exception when initialize
> RegionScanner, the master branch has this bug, too.
> ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Failed openScanner
> java.io.IOException: Could not seek StoreFileScanner
> at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:160)
> at
> org.apache.hadoop.hbase.regionserver.StoreScanner.seekScanners(StoreScanner.java:268)
> at
> org.apache.hadoop.hbase.regionserver.StoreScanner.<init>(StoreScanner.java:168)
> at org.apache.hadoop.hbase.regionserver.Store.getScanner(Store.java:2232)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.<init>(HRegion.java:4026)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.instantiateRegionScanner(HRegion.java:1895)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1879)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.getScanner(HRegion.java:1854)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.internalOpenScanner(HRegionServer.java:3032)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.openScanner(HRegionServer.java:2995)
> at sun.reflect.GeneratedMethodAccessor67.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.hadoop.hbase.ipc.SecureRpcEngine$Server.call(SecureRpcEngine.java:338)
> at
> org.apache.hadoop.hbase.ipc.HBaseServer$Handler.run(HBaseServer.java:1595)
> Caused by: org.apache.hadoop.hbase.ipc.CallerDisconnectedException: Aborting
> call openScanner, since caller disconnected
> at
> org.apache.hadoop.hbase.ipc.HBaseServer$Call.throwExceptionIfCallerDisconnected(HBaseServer.java:475)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$AbstractFSReader.readAtOffset(HFileBlock.java:1443)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderV2.readBlockDataInternal(HFileBlock.java:1902)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlock$FSReaderV2.readBlockData(HFileBlock.java:1766)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2.readBlock(HFileReaderV2.java:345)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$BlockIndexReader.loadDataBlockWithScanInfo(HFileBlockIndex.java:254)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:499)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderV2$AbstractScannerV2.seekTo(HFileReaderV2.java:520)
> at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.seekAtOrAfter(StoreFileScanner.java:235)
> at
> org.apache.hadoop.hbase.regionserver.StoreFileScanner.seek(StoreFileScanner.java:148)
> ... 14 more
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