Move Datanode packet IO logging to its own log
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Key: HADOOP-5137
URL: https://issues.apache.org/jira/browse/HADOOP-5137
Project: Hadoop Core
Issue Type: Improvement
Components: dfs
Affects Versions: 0.21.0
Reporter: Steve Loughran
Priority: Minor
If the Datanode is set to log at info, then the log fills up with lots of
details about packet sending and receiving
[sf-startdaemon-debug] 09/01/28 13:15:42
[org.apache.hadoop.hdfs.server.datanode.dataxcei...@83efe6e] INFO
datanode.DataNode : Receiving block blk_-3185775405544105186_1757 src:
/127.0.0.1:41218 dest: /127.0.0.1:48017
[sf-startdaemon-debug] 09/01/28 13:15:42 [PacketResponder 0 for Block
blk_-3185775405544105186_1757] INFO datanode.DataNode : Received block
blk_-3185775405544105186_1757 of size 3647 from /127.0.0.1:41218
[sf-startdaemon-debug] 09/01/28 13:15:42 [PacketResponder 0 for Block
blk_-3185775405544105186_1757] INFO datanode.DataNode : PacketResponder 0 for
block blk_-3185775405544105186_1757 terminating
[sf-startdaemon-debug] 09/01/28 13:15:42
[org.apache.hadoop.hdfs.server.datanode.dataxcei...@83f0029] INFO
datanode.DataNode : Receiving block blk_-1511363731410268168_1758 src:
/127.0.0.1:41219 dest: /127.0.0.1:48017
[sf-startdaemon-debug] 09/01/28 13:15:42 [PacketResponder 0 for Block
blk_-1511363731410268168_1758] INFO datanode.DataNode : Received block
blk_-1511363731410268168_1758 of size 940 from /127.0.0.1:41219
[sf-startdaemon-debug] 09/01/28 13:15:42 [PacketResponder 0 for Block
blk_-1511363731410268168_1758] INFO datanode.DataNode : PacketResponder 0 for
block blk_-1511363731410268168_1758 terminating
[sf-startdaemon-debug] 09/01/28 13:15:42
[org.apache.hadoop.hdfs.server.datanode.dataxcei...@83f01e4] INFO
datanode.DataNode : Receiving block blk_-967265843864311176_1759 src:
/127.0.0.1:41220 dest: /127.0.0.1:48017
[sf-startdaemon-debug] 09/01/28 13:15:42 [PacketResponder 0 for Block
blk_-967265843864311176_1759] INFO datanode.DataNode : Received block
blk_-967265843864311176_1759 of size 36948 from /127.0.0.1:41220
It would be convenient for those people who only want to see errors in
communication but monitor other DataNode operations to have a separate logger
for DataNode communications; one to view at a separate log level.
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