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Posted to hdfs-issues@hadoop.apache.org by "Wei-Chiu Chuang (Jira)" <ji...@apache.org> on 2023/05/23 21:52:00 UTC
[jira] [Assigned] (HDFS-17024) Potential data race introduced by HDFS-15865
[ https://issues.apache.org/jira/browse/HDFS-17024?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wei-Chiu Chuang reassigned HDFS-17024:
--------------------------------------
Assignee: Wei-Chiu Chuang
> Potential data race introduced by HDFS-15865
> --------------------------------------------
>
> Key: HDFS-17024
> URL: https://issues.apache.org/jira/browse/HDFS-17024
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Wei-Chiu Chuang
> Assignee: Wei-Chiu Chuang
> Priority: Major
>
> After HDFS-15865, we found client aborted due to an NPE.
> {noformat}
> 2023-04-10 16:07:43,409 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: ***** ABORTING region server kqhdp36,16020,1678077077562: Replay of WAL required. Forcing server shutdown *****
> org.apache.hadoop.hbase.DroppedSnapshotException: region: WAFER_ALL,16|CM RIE.MA1|CP1114561.18|PROC|0000,1625899466315.0fbdf0f1810efa9e68af831247e6555f.
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushCacheAndCommit(HRegion.java:2870)
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2539)
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:2511)
> at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:2401)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:613)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:582)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.access$1000(MemStoreFlusher.java:69)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher$FlushHandler.run(MemStoreFlusher.java:362)
> at java.lang.Thread.run(Thread.java:748)
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.hdfs.DataStreamer.waitForAckedSeqno(DataStreamer.java:880)
> at org.apache.hadoop.hdfs.DFSOutputStream.flushInternal(DFSOutputStream.java:781)
> at org.apache.hadoop.hdfs.DFSOutputStream.closeImpl(DFSOutputStream.java:898)
> at org.apache.hadoop.hdfs.DFSOutputStream.close(DFSOutputStream.java:850)
> at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:76)
> at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:105)
> at org.apache.hadoop.hbase.io.hfile.HFileWriterImpl.finishClose(HFileWriterImpl.java:859)
> at org.apache.hadoop.hbase.io.hfile.HFileWriterImpl.close(HFileWriterImpl.java:687)
> at org.apache.hadoop.hbase.regionserver.StoreFileWriter.close(StoreFileWriter.java:393)
> at org.apache.hadoop.hbase.regionserver.StoreFlusher.finalizeWriter(StoreFlusher.java:69)
> at org.apache.hadoop.hbase.regionserver.DefaultStoreFlusher.flushSnapshot(DefaultStoreFlusher.java:78)
> at org.apache.hadoop.hbase.regionserver.HStore.flushCache(HStore.java:1047)
> at org.apache.hadoop.hbase.regionserver.HStore$StoreFlusherImpl.flushCache(HStore.java:2349)
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushCacheAndCommit(HRegion.java:2806)
> {noformat}
> This is only possible if a data race happened. File this jira to improve the data and eliminate the data race.
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