Edit log replay should track and report file offsets in case of errors
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Key: HDFS-1378
URL: https://issues.apache.org/jira/browse/HDFS-1378
Project: Hadoop HDFS
Issue Type: Improvement
Components: name-node
Affects Versions: 0.22.0
Reporter: Todd Lipcon
Assignee: Todd Lipcon
Occasionally there are bugs or operational mistakes that result in corrupt edit
logs which I end up having to repair by hand. In these cases it would be very
handy to have the error message also print out the file offsets of the last
several edit log opcodes so it's easier to find the right place to edit in the
OP_INVALID marker. We could also use this facility to provide a rough estimate
of how far along edit log replay the NN is during startup (handy when a 2NN has
died and replay takes a while)
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