The actual body of the error contains a statement to the effect that the
Namenode has an edit log with timestamp of ..... but new checkpoint was
created using editlog with timestamp ....
This is from FSImage.validateCheckpointUpload. The drift is about the difft
in time in the edit logs.
THe unique situation in my experience here is that one of the dfs.name.dir
directories is on an nfs mounted file system, and that particular file has a
mode time that is often 0.5+/-0.5 seconds different.
Any simple fixes? Even with the best ntp, we are going to be +/- a few msec
and the test in validateCheckpointUpoad is exact equals comparison.
The other thing that confuses me is why, the time stamp is differenet, the
code from a reading, appears to always pick the same file for modtime
comparisons.
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