Sergey Shelukhin created HBASE-21564:
----------------------------------------
Summary: race condition in WAL rolling
Key: HBASE-21564
URL: https://issues.apache.org/jira/browse/HBASE-21564
Project: HBase
Issue Type: Bug
Reporter: Sergey Shelukhin
Assignee: Sergey Shelukhin
Manifests at least with AsyncFsWriter.
There's a window after LogRoller replaces the writer in the WAL, but before it
sets the rollLog boolean to false in the finally, where the WAL class can
request another log roll (it can happen in particular when the logs are getting
archived in the LogRoller thread, and there's high write volume causing the
logs to roll quickly).
LogRoller will blindly reset the rollLog flag in finally and "forget" about
this request.
AsyncWAL in turn never requests it again because its own rollRequested field is
set and it expects a callback. Logs don't get rolled until a periodic roll is
triggered after that.
The acknowledgment of roll requests by LogRoller should be atomic.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
