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From Dima Spivak <dspi...@cloudera.com>
Subject Re: (BUG)Failed to read block error when enable replication
Date Wed, 03 Aug 2016 05:12:45 GMT
Hey Yang,

Looks like HDFS is having trouble with a block. Have you tried running
hadoop fsck?

-Dima

On Tuesday, August 2, 2016, Ming Yang <yangming860101@gmail.com> wrote:

> When enabled replication,we found a large number of error logs.Is the
> cluster configuration incorrect?
>
> 2016-08-03 10:46:21,721 DEBUG
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource: Opening
> log for replication dn7%2C60020%2C1470136216957.1470192327030 at 16999670
> 2016-08-03 10:46:21,723 WARN org.apache.hadoop.hdfs.DFSClient:
> BlockReaderLocal requested with incorrect offset: Offset 0 and length
> 17073479 don't match block blk_4137524355009640437_53760530 ( blockLen
> 16999670 )
> 2016-08-03 10:46:21,723 WARN org.apache.hadoop.hdfs.DFSClient:
> BlockReaderLocal: Removing blk_4137524355009640437_53760530 from cache
> because local file
> /sdd/hdfs/dfs/data/blocksBeingWritten/blk_4137524355009640437 could not be
> opened.
> 2016-08-03 10:46:21,724 INFO org.apache.hadoop.hdfs.DFSClient: Failed to
> read block blk_4137524355009640437_53760530 on local
> machinejava.io.IOException: Offset 0 and length 17073479 don't match block
> blk_4137524355009640437_53760530 ( blockLen 16999670 )
> at
> org.apache.hadoop.hdfs.BlockReaderLocal.<init>(BlockReaderLocal.java:287)
> at
>
> org.apache.hadoop.hdfs.BlockReaderLocal.newBlockReader(BlockReaderLocal.java:171)
> at org.apache.hadoop.hdfs.DFSClient.getLocalBlockReader(DFSClient.java:358)
> at org.apache.hadoop.hdfs.DFSClient.access$800(DFSClient.java:74)
> at
>
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.blockSeekTo(DFSClient.java:2073)
> at
> org.apache.hadoop.hdfs.DFSClient$DFSInputStream.read(DFSClient.java:2224)
> at java.io.DataInputStream.read(DataInputStream.java:149)
> at java.io.DataInputStream.readFully(DataInputStream.java:195)
> at java.io.DataInputStream.readFully(DataInputStream.java:169)
> at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1508)
> at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1486)
> at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1475)
> at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:1470)
> at
>
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader$WALReader.<init>(SequenceFileLogReader.java:55)
> at
>
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogReader.init(SequenceFileLogReader.java:178)
> at org.apache.hadoop.hbase.regionserver.wal.HLog.getReader(HLog.java:734)
> at
>
> org.apache.hadoop.hbase.replication.regionserver.ReplicationHLogReaderManager.openReader(ReplicationHLogReaderManager.java:69)
> at
>
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.openReader(ReplicationSource.java:574)
> at
>
> org.apache.hadoop.hbase.replication.regionserver.ReplicationSource.run(ReplicationSource.java:364)
>
> 2016-08-03 10:46:21,724 INFO org.apache.hadoop.hdfs.DFSClient: Try reading
> via the datanode on /192.168.7.139:50010
>


-- 
-Dima

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