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https://issues.apache.org/jira/browse/HBASE-19980?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16364302#comment-16364302
]
Toshihiro Suzuki commented on HBASE-19980:
------------------------------------------
[~mdrob] We have TestMobRestoreSnapshotFromClient. Isn't it enough?
> NullPointerException when restoring a snapshot after splitting a region
> -----------------------------------------------------------------------
>
> Key: HBASE-19980
> URL: https://issues.apache.org/jira/browse/HBASE-19980
> Project: HBase
> Issue Type: Bug
> Components: snapshots
> Reporter: Toshihiro Suzuki
> Assignee: Toshihiro Suzuki
> Priority: Major
> Attachments: HBASE-19980-UT.patch, HBASE-19980.master.001.patch,
> HBASE-19980.master.002.patch
>
>
> Investigating HBASE-19893, I'm facing the following NullPointerException when
> restoring a snapshot after splitting a region:
> {code}
> 2018-02-13 01:59:56,033 ERROR [PEWorker-1]
> procedure.RestoreSnapshotProcedure(403): restore snapshot={
> ss=snaptb1-1518454780480
> table=testRestoreSnapshotAfterSplittingRegions-1518454780480 type=FLUSH }
> failed in on-disk restore. Try re-running the restore command.
> java.io.IOException
> at
> org.apache.hadoop.hbase.util.ModifyRegionUtils.editRegions(ModifyRegionUtils.java:222)
> at
> org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.restoreHdfsRegions(RestoreSnapshotHelper.java:424)
> at
> org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.restoreHdfsRegions(RestoreSnapshotHelper.java:227)
> at
> org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.restoreHdfsRegions(RestoreSnapshotHelper.java:177)
> at
> org.apache.hadoop.hbase.master.procedure.RestoreSnapshotProcedure.restoreSnapshot(RestoreSnapshotProcedure.java:395)
> at
> org.apache.hadoop.hbase.master.procedure.RestoreSnapshotProcedure.executeFromState(RestoreSnapshotProcedure.java:143)
> at
> org.apache.hadoop.hbase.master.procedure.RestoreSnapshotProcedure.executeFromState(RestoreSnapshotProcedure.java:58)
> at
> org.apache.hadoop.hbase.procedure2.StateMachineProcedure.execute(StateMachineProcedure.java:180)
> at
> org.apache.hadoop.hbase.procedure2.Procedure.doExecute(Procedure.java:845)
> at
> org.apache.hadoop.hbase.procedure2.ProcedureExecutor.execProcedure(ProcedureExecutor.java:1455)
> at
> org.apache.hadoop.hbase.procedure2.ProcedureExecutor.executeProcedure(ProcedureExecutor.java:1224)
> at
> org.apache.hadoop.hbase.procedure2.ProcedureExecutor.access$800(ProcedureExecutor.java:78)
> at
> org.apache.hadoop.hbase.procedure2.ProcedureExecutor$WorkerThread.run(ProcedureExecutor.java:1734)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.restoreReferenceFile(RestoreSnapshotHelper.java:751)
> at
> org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.restoreStoreFile(RestoreSnapshotHelper.java:675)
> at
> org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.restoreRegion(RestoreSnapshotHelper.java:521)
> at
> org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.restoreRegion(RestoreSnapshotHelper.java:464)
> at
> org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper.access$300(RestoreSnapshotHelper.java:116)
> at
> org.apache.hadoop.hbase.snapshot.RestoreSnapshotHelper$2.editRegion(RestoreSnapshotHelper.java:427)
> at
> org.apache.hadoop.hbase.util.ModifyRegionUtils$2.call(ModifyRegionUtils.java:209)
> at
> org.apache.hadoop.hbase.util.ModifyRegionUtils$2.call(ModifyRegionUtils.java:206)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> at java.util.concurrent.FutureTask.run(FutureTask.java:266)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
> at java.lang.Thread.run(Thread.java:745)
> {code}
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