Jeff Lord created HADOOP-8519:
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Summary: ERROR level log message should probably be changed to INFO
Key: HADOOP-8519
URL: https://issues.apache.org/jira/browse/HADOOP-8519
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 0.20.2
Environment: Red Hat Enterprise Linux Server release 6.2 (Santiago)
Reporter: Jeff Lord
Datanode service is logging java.net.SocketTimeoutException at ERROR level.
This message indicates that the datanode is not able to send data to the client
because the client has stopped reading. This message is not really a cause for
alarm and should be INFO level.
2012-06-18 17:47:13 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode
DatanodeRegistration(x.x.x.x:50010,
storageID=DS-196671195-10.10.120.67-50010-1334328338972, infoPort=50075,
ipcPort=50020):DataXceiver
java.net.SocketTimeoutException: 480000 millis timeout while waiting for
channel to be ready for write. ch : java.nio.channels.SocketChannel[connected
local=/10.10.120.67:50010 remote=/10.10.120.67:59282]
at
org.apache.hadoop.net.SocketIOWithTimeout.waitForIO(SocketIOWithTimeout.java:246)
at
org.apache.hadoop.net.SocketOutputStream.waitForWritable(SocketOutputStream.java:159)
at
org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:198)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.sendChunks(BlockSender.java:397)
at
org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:493)
at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:267)
at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:163)
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