Scheduled tasks in distributed log splitting not in sync with ZK
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Key: HBASE-3890
URL: https://issues.apache.org/jira/browse/HBASE-3890
Project: HBase
Issue Type: Bug
Components: regionserver
Affects Versions: 0.92.0
Reporter: Lars George
Fix For: 0.92.0
This is in continuation to HBASE-3889:
Note that there must be more slightly off here. Although the splitlogs znode is
now empty the master is still stuck here:
{noformat}
Doing distributed log split in
hdfs://localhost:8020/hbase/.logs/10.0.0.65,60020,1305406356765
- Waiting for distributed tasks to finish. scheduled=2 done=1 error=0 4380s
Master startup
- Splitting logs after master startup 4388s
{noformat}
There seems to be an issue with what is in ZK and what the TaskBatch holds. In
my case it could be related to the fact that the task was already in ZK after
many faulty restarts because of the NPE. Maybe it was added once (since that is
keyed by path, and that is unique on my machine), but the reference count upped
twice? Now that the real one is done, the done counter has been increased, but
will never match the scheduled.
The code could also check if ZK is actually depleted, and therefore treat the
scheduled task as bogus? This of course only treats the symptom, not the root
cause of this condition.
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