Cluster hangs if RS serving root fails during startup sequence
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Key: HBASE-4245
URL: https://issues.apache.org/jira/browse/HBASE-4245
Project: HBase
Issue Type: Bug
Components: master
Affects Versions: 0.90.3
Reporter: Todd Lipcon
On a large-ish cluster, the following sequence of events was seen to happen:
- master started, ROOT and META were both unassigned
- ROOT is assigned to rs01
- META is assigned to rs02
- Upon open of META, it writes its location into ROOT on rs01
- rs01 crashes while appending to its HLog due to some other bug
- rs02 fails the region open sequence
- master notices that rs01 has crashed, and enqueues a ServerShutdownHandler
- ServerShutdownHandler blocks on CatalogTracker.waitForMeta() since ROOT and
META are not assigned yet
- master times out assignment of META, but never succeeds because ROOT location
is still marked as rs01
This causes the cluster to never start up.
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