Hey Yang, Looks like HDFS is having trouble with a block. Have you tried running hadoop fsck?
-Dima On Thursday, August 11, 2016, Ming Yang <yangming860...@gmail.com> wrote: > The cluster enabled shortCircuitLocalReads. > <property> > <name>dfs.client.read.shortcircuit</name> > <value>true</value> > </property> > > When enabled replication,we found a large number of error logs. > 1.shortCircuitLocalReads(fail everytime). > 2.Try reading via the datanode on targetAddr(success). > How to make shortCircuitLocalReads successfully when enabled replication? > > 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
