FAQ
I found this exception below in my datanode log. Anybody know why this
happens?

09/08/23 22:13:50 WARN hdfs.DFSClient: DataStreamer Exception:
java.net.SocketTimeoutException: 15000 millis timeout while waiting for
channel to be ready for write. ch :
java.nio.channels.SocketChannel[connected local=/10.0.0.8:37135
remote=/10.0.0.8:50010]
at
org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:164)
at
org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:146)
at
org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:107)
at java.io.BufferedOutputStream.write(BufferedOutputStream.java:105)
at java.io.DataOutputStream.write(DataOutputStream.java:90)
at
org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2247)
--
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postedAug 23, '09 at 3:09p
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