[hbase] when the master times out a region server's lease, it is too aggressive
in reclaiming the server's log
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Key: HADOOP-1937
URL: https://issues.apache.org/jira/browse/HADOOP-1937
Project: Hadoop
Issue Type: Bug
Components: contrib/hbase
Affects Versions: 0.15.0
Reporter: Jim Kellerman
Assignee: Jim Kellerman
Fix For: 0.15.0
When a region server's lease times out, the master immediately begins trying to
split the server's log file. There have been cases where a region server was
just a little late reporting to the master and the master had already started
trying to reclaim the server's log, even though the server was still writing to
it.
There needs to be some kind of "grace period" in which, if the region server
reports in, the master re-instates the server. If the "grace period" expires,
then the master should start processing the server's log.
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