[jira] [Resolved] (HBASE-23684) NPE HFilesOutputSink

["Guanghao Zhang (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-23684?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Guanghao Zhang resolved HBASE-23684.
------------------------------------
    Resolution: Duplicate

Resolved as duplicate.

> NPE HFilesOutputSink
> --------------------
>
>                 Key: HBASE-23684
>                 URL: https://issues.apache.org/jira/browse/HBASE-23684
>             Project: HBase
>          Issue Type: Bug
>          Components: MTTR, wal
>    Affects Versions: 2.3.0
>            Reporter: Michael Stack
>            Assignee: Guanghao Zhang
>            Priority: Critical
>             Fix For: 3.0.0, 2.3.0
>
>
> Enabling the new split to hfiles feature, HBASE-23286, running branch-2 tip, I see this out on RegionServers:
> {code}
>  2020-01-13 17:37:08,204 INFO org.apache.hadoop.hbase.wal.OutputSink: 3 split writer threads finished
>  2020-01-13 17:37:08,233 INFO org.apache.hadoop.hbase.wal.WALSplitter: Processed 1007 edits across 0 regions cost 284 ms; edits skipped=76; WAL=hdfs://nameservice1/hbase/genie/WALs/hbasedn101.example.org,16020,1578934806382-splitting/hbasedn101.example.org%2C16020%2C1578934806382.1578937008832, size=128.5 M, length=134708720, corrupted=false, progress         failed=true
>  2020-01-13 17:37:08,234 WARN org.apache.hadoop.hbase.regionserver.SplitLogWorker: log splitting of WALs/hbasedn101.example.org,16020,1578934806382-splitting/hbasedn101.example.org%2C16020%2C1578934806382.1578937008832 failed, returning error
>  java.io.IOException: java.lang.NullPointerException
>          at org.apache.hadoop.hbase.wal.BoundedRecoveredHFilesOutputSink.writeRemainingEntryBuffers(BoundedRecoveredHFilesOutputSink.java:173)
>          at org.apache.hadoop.hbase.wal.BoundedRecoveredHFilesOutputSink.close(BoundedRecoveredHFilesOutputSink.java:140)
>          at org.apache.hadoop.hbase.wal.WALSplitter.splitLogFile(WALSplitter.java:339)
>          at org.apache.hadoop.hbase.wal.WALSplitter.splitLogFile(WALSplitter.java:181)
>          at org.apache.hadoop.hbase.regionserver.SplitLogWorker.splitLog(SplitLogWorker.java:105)
>          at org.apache.hadoop.hbase.regionserver.SplitLogWorker.lambda$new$0(SplitLogWorker.java:84)
>          at org.apache.hadoop.hbase.regionserver.handler.WALSplitterHandler.process(WALSplitterHandler.java:70)
>          at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:104)
>          at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
>          at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
>          at java.base/java.lang.Thread.run(Thread.java:834)
>  Caused by: java.lang.NullPointerException
>          at org.apache.hadoop.hbase.wal.BoundedRecoveredHFilesOutputSink.configContextForNonMetaWriter(BoundedRecoveredHFilesOutputSink.java:225)
>          at org.apache.hadoop.hbase.wal.BoundedRecoveredHFilesOutputSink.createRecoveredHFileWriter(BoundedRecoveredHFilesOutputSink.java:213)
>          at org.apache.hadoop.hbase.wal.BoundedRecoveredHFilesOutputSink.append(BoundedRecoveredHFilesOutputSink.java:117)
>          at org.apache.hadoop.hbase.wal.BoundedRecoveredHFilesOutputSink.lambda$writeRemainingEntryBuffers$3(BoundedRecoveredHFilesOutputSink.java:155)
>          at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
>          at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
>          at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
> {code}
> It is a bit odd because log says there were zero regions. Not sure what that was about.



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