Allan Yang created HBASE-21423:
----------------------------------
Summary: Procedures for meta table/region should be able to
executed in separate workers
Key: HBASE-21423
URL: https://issues.apache.org/jira/browse/HBASE-21423
Project: HBase
Issue Type: Sub-task
Affects Versions: 2.0.2, 2.1.1
Reporter: Allan Yang
Assignee: Allan Yang
We have higher priority for meta table procedures, but only in queue level.
There is a case that the meta table is closed and a AssignProcedure(or RTSP in
branch-2+) is waiting there to be executed, but at the same time, all the Work
threads are executing procedures need to write to meta table, then all the
worker will be stuck and retry for writing meta, no worker will take the AP for
meta.
Though we have a mechanism that will detect stuck and adding more ''KeepAlive''
workers to the pool to resolve the stuck. It is already stuck a long time.
This is a real case I encountered in ITBLL.
So, I add one 'Urgent work' to the ProceudureExecutor, which only take meta
procedures(other workers can take meta procedures too), which can resolve this
kind of stuck.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
