[HBASE-2933] Skip EOF Errors during Log Recovery

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 0.90.0
• Hadoop Flags: Reviewed
• Assignee: Nicolas Spiegelberg
• Reporter: Nicolas Spiegelberg
• Created: 21/Aug/10 01:07
• Updated: 20/Nov/15 12:42
• Resolved: 16/Oct/10 05:29

Description

While testing a cluster, we hit upon the following assert during region assigment. We were killing the master during a long run of splits. We think what happened is that the HMaster was killed while splitting, woke up & split again. If this happens, we will have 2 files: 1 partially written and 1 complete one. Since encountering partial log splits upon Master failure is considered normal behavior, we should continue at the RS level if we encounter an EOFException & not an filesystem-level exception, even with skip.errors == false.

2010-08-20 16:59:07,718 ERROR org.apache.hadoop.hbase.regionserver.HRegionServer: Error opening MailBox_dsanduleac,57db45276ece7ce03ef7e8d9969eb189:[e-mail],1280960828959.7c542d24d4496e273b739231b01885e6.
java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:375)
at org.apache.hadoop.io.SequenceFile$Reader.readRecordLength(SequenceFile.java:1902)
at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1932)
at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1837)
at org.apache.hadoop.io.SequenceFile$Reader.next(SequenceFile.java:1883)
at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.next(SequenceFileLogReader.java:121)
at org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.next(SequenceFileLogReader.java:113)
at org.apache.hadoop.hbase.regionserver.HRegion.replayRecoveredEdits(HRegion.java:1981)
at org.apache.hadoop.hbase.regionserver.HRegion.replayRecoveredEdits(HRegion.java:1956)
at org.apache.hadoop.hbase.regionserver.HRegion.replayRecoveredEditsIfAny(HRegion.java:1915)
at org.apache.hadoop.hbase.regionserver.HRegion.initialize(HRegion.java:344)
at org.apache.hadoop.hbase.regionserver.HRegionServer.instantiateRegion(HRegionServer.java:1490)
at org.apache.hadoop.hbase.regionserver.HRegionServer.openRegion(HRegionServer.java:1437)
at org.apache.hadoop.hbase.regionserver.HRegionServer$Worker.run(HRegionServer.java:1345)
at java.lang.Thread.run(Thread.java:619)
2010-08-20 16:59:07,719 ERROR org.apache.hadoop.hbase.regionserver.RSZookeeperUpdater: Aborting open of region 7c542d24d4496e273b739231b01885e6

Issue Links

• depends upon: HADOOP-6986 SequenceFile.Reader should distinguish between Network IOE and Parsing IOE
• is related to: HBASE-3081 Log Splitting & Replay: Distinguish between Network IOE and Parsing IOE
• relates to: HBASE-2337 log recovery: splitLog deletes old logs prematurely
• relates to: HBASE-2643 Figure how to deal with eof splitting logs