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https://issues.apache.org/jira/browse/HBASE-21665?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16732643#comment-16732643
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Pankaj Kumar commented on HBASE-21665:
--------------------------------------
What is the future of OfflineMetaRepair tool, however this is an important tool
IMO for rebuilding meta in case of meta corruption or upgrade.
What is your opinion? Should we fix this problem here and make the region
assignment on master startup?
or
{quote}read the regions from FS and assign them
{quote}
Add option in HBCK2 to read the regions from FS and assign them.
> OfflineMetaRepair tool fails with NPE
> -------------------------------------
>
> Key: HBASE-21665
> URL: https://issues.apache.org/jira/browse/HBASE-21665
> Project: HBase
> Issue Type: Bug
> Components: hbck
> Affects Versions: 2.1.0, 2.0.0
> Reporter: Pankaj Kumar
> Assignee: Pankaj Kumar
> Priority: Critical
>
> OfflineMetaRepair fails with NPE, execute below command
> hbase org.apache.hadoop.hbase.util.hbck.OfflineMetaRepair -fix
>
> {noformat}
> 2019-01-02 16:22:56,387 INFO [main] regionserver.HRegion: Opened 1588230740;
> next sequenceid=28
> 2019-01-02 16:22:56,459 ERROR [main] hbck.OfflineMetaRepair: Bailed out due
> to:
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.MemStoreLABImpl.getOrMakeChunk(MemStoreLABImpl.java:335)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreLABImpl.copyCellInto(MemStoreLABImpl.java:193)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreLABImpl.copyCellInto(MemStoreLABImpl.java:115)
> at
> org.apache.hadoop.hbase.regionserver.Segment.maybeCloneWithAllocator(Segment.java:183)
> at
> org.apache.hadoop.hbase.regionserver.AbstractMemStore.maybeCloneWithAllocator(AbstractMemStore.java:334)
> at
> org.apache.hadoop.hbase.regionserver.AbstractMemStore.doAdd(AbstractMemStore.java:157)
> at
> org.apache.hadoop.hbase.regionserver.AbstractMemStore.doAddOrUpsert(AbstractMemStore.java:147)
> at
> org.apache.hadoop.hbase.regionserver.AbstractMemStore.add(AbstractMemStore.java:117)
> at
> org.apache.hadoop.hbase.regionserver.AbstractMemStore.add(AbstractMemStore.java:111)
> at org.apache.hadoop.hbase.regionserver.HStore.add(HStore.java:750)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.applyToMemStore(HRegion.java:4435)
> at org.apache.hadoop.hbase.regionserver.HRegion.access$500(HRegion.java:228)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$BatchOperation.applyFamilyMapToMemStore(HRegion.java:3495)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$BatchOperation.lambda$writeMiniBatchOperationsToMemStore$0(HRegion.java:3186)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$BatchOperation.visitBatchOperations(HRegion.java:3119)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$BatchOperation.writeMiniBatchOperationsToMemStore(HRegion.java:3178)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$MutationBatchOperation.writeMiniBatchOperationsToMemStore(HRegion.java:3660)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.doMiniBatchMutate(HRegion.java:4073)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:4006)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:3937)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.batchMutate(HRegion.java:3928)
> at org.apache.hadoop.hbase.util.HBaseFsck.rebuildMeta(HBaseFsck.java:1665)
> at
> org.apache.hadoop.hbase.util.hbck.OfflineMetaRepair.main(OfflineMetaRepair.java:121)
> {noformat}
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