Too many log messages generated if a node has a different Hadoop version installed
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Key: MAPREDUCE-1468
URL: https://issues.apache.org/jira/browse/MAPREDUCE-1468
Project: Hadoop Map/Reduce
Issue Type: Improvement
Affects Versions: 0.20.1
Reporter: Qi Liu
When upgrading or downgrading Hadoop, for a large cluster it is possible that some nodes are
not upgraded/downgraded. In this case, the jobtracker and namenode generates gigabytes of
logs each day, reporting protocol version mismatch. Such log message is generated once every
3ms.
Ideally, the misbehaved node should quit retrying after several attempts if there is a protocol
version mismatch. At the very least, the log message should be minimized (maybe once a day
or once per start up).
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