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From "Walter Su (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HDFS-8339) Erasure Coding: Badly treated when createBlockOutputStream failed in DataStreamer
Date Thu, 07 May 2015 11:37:00 GMT
Walter Su created HDFS-8339:
-------------------------------

             Summary: Erasure Coding:  Badly treated when createBlockOutputStream failed in
DataStreamer
                 Key: HDFS-8339
                 URL: https://issues.apache.org/jira/browse/HDFS-8339
             Project: Hadoop HDFS
          Issue Type: Sub-task
            Reporter: Walter Su


h4. Issue 1:
leading streamer calls abandonBlock(..) and get new blockGroup from NN, primary streamer should
sync with non-leading streamer instead of throw exception( offer twice to stripedBlock blockingQueue).
{noformat}
2015-05-07 18:58:05,335 INFO  hdfs.DataStreamer (DataStreamer.java:nextBlockOutputStream(1386))
- Abandoning BP-172584615-9.96.1.34-1430996280714:blk_-9223372036854775792_1001
...
2015-05-07 18:58:05,373 WARN  hdfs.DataStreamer (DataStreamer.java:run(572)) - DataStreamer
Exception
java.io.IOException: Failed: LocatedBlock{BP-172584615-9.96.1.34-1430996280714:blk_-9223372036854775770_1002;
getBlockSize()=0; corrupt=false; offset=1572864; locs=[DatanodeInfoWithStorage[127.0.0.1:52490,DS-6080b76f-adf7-45a8-aa0e-e0e82c2c1569,DISK]]},
i=6
    at org.apache.hadoop.hdfs.DFSStripedOutputStream$Coordinator.putStripedBlock(DFSStripedOutputStream.java:117)
    at org.apache.hadoop.hdfs.StripedDataStreamer.locateFollowingBlock(StripedDataStreamer.java:120)
    at org.apache.hadoop.hdfs.DataStreamer.nextBlockOutputStream(DataStreamer.java:1364)
    at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:461)
    at org.apache.hadoop.hdfs.StripedDataStreamer.run(StripedDataStreamer.java:48)
{noformat}
h4. Issue 2:
non-leading streamer calls abandonBlock(..) and get new locatedBlock from coordinator. Actually
it's the last blockGroup, no more locatedBlock can poll from stripedBlocks blockingQueue.
Other 8 streamer finished and closed, but this streamer hangs about 90 seconds.
{noformat}
2015-05-07 19:21:25,357 INFO  BlockStateChange (BlockManager.java:logAddStoredBlock(2768))
- BLOCK* addStoredBlock: blockMap updated: 127.0.0.1:51998 is added to ...
2015-05-07 19:22:55,250 WARN  hdfs.DataStreamer (DataStreamer.java:run(572)) - DataStreamer
Exception
java.io.IOException: Failed: i=1 
    at org.apache.hadoop.hdfs.DFSStripedOutputStream$Coordinator.getStripedBlock(DFSStripedOutputStream.java:130)
    at org.apache.hadoop.hdfs.StripedDataStreamer.locateFollowingBlock(StripedDataStreamer.java:124)
    at org.apache.hadoop.hdfs.DataStreamer.nextBlockOutputStream(DataStreamer.java:1364)
    at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:461)
    at org.apache.hadoop.hdfs.StripedDataStreamer.run(StripedDataStreamer.java:48)
{noformat}

h4. Issue 3:
remove abandonBlock(..) RPC call for non-leading streamer



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