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From "Bryan Duxbury (JIRA)" <j...@apache.org>
Subject [jira] Created: (HBASE-529) RegionServer needs to recover if datanode goes down
Date Tue, 18 Mar 2008 19:47:24 GMT
RegionServer needs to recover if datanode goes down
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                 Key: HBASE-529
                 URL: https://issues.apache.org/jira/browse/HBASE-529
             Project: Hadoop HBase
          Issue Type: Bug
    Affects Versions: 0.16.0
            Reporter: Bryan Duxbury
            Assignee: Bryan Duxbury
            Priority: Blocker
             Fix For: 0.1.0, 0.2.0


If I take down a datanode, the regionserver will repeatedly return this error:

java.io.IOException: Stream closed.
        at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.isClosed(DFSClient.java:1875)
        at org.apache.hadoop.dfs.DFSClient$DFSOutputStream.writeChunk(DFSClient.java:2096)
        at org.apache.hadoop.fs.FSOutputSummer.writeChecksumChunk(FSOutputSummer.java:141)
        at org.apache.hadoop.fs.FSOutputSummer.flushBuffer(FSOutputSummer.java:124)
        at org.apache.hadoop.fs.FSOutputSummer.write1(FSOutputSummer.java:112)
        at org.apache.hadoop.fs.FSOutputSummer.write(FSOutputSummer.java:86)
        at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.write(FSDataOutputStream.java:41)
        at java.io.DataOutputStream.write(Unknown Source)
        at org.apache.hadoop.io.SequenceFile$Writer.append(SequenceFile.java:977)
        at org.apache.hadoop.hbase.HLog.append(HLog.java:377)
        at org.apache.hadoop.hbase.HRegion.update(HRegion.java:1455)
        at org.apache.hadoop.hbase.HRegion.batchUpdate(HRegion.java:1259)
        at org.apache.hadoop.hbase.HRegionServer.batchUpdate(HRegionServer.java:1433)
        at sun.reflect.GeneratedMethodAccessor9.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at org.apache.hadoop.hbase.ipc.HbaseRPC$Server.call(HbaseRPC.java:413)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:910)

It appears that hbase/dfsclient does not attempt to reopen the stream.

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