You are viewing a plain text version of this content. The canonical link for it is here.
Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2018/09/12 18:00:03 UTC
[jira] [Created] (HBASE-21191) Add a holding-pattern if no assign
for meta or namespace (Can happen if masterprocwals have been cleared).
stack created HBASE-21191:
-----------------------------
Summary: Add a holding-pattern if no assign for meta or namespace (Can happen if masterprocwals have been cleared).
Key: HBASE-21191
URL: https://issues.apache.org/jira/browse/HBASE-21191
Project: HBase
Issue Type: Sub-task
Components: amv2
Reporter: stack
Assignee: stack
If the masterprocwals have been removed -- operator error, hdfs dataloss, or because we have gotten ourselves into a pathological state where we have hundreds of masterprocwals too process and it is taking too long so we just want to startover -- then master startup will have a dilemma. Master startup needs hbase:meta to be online. If the masterprocwals have been removed, there may be no outstanding assign or a servercrashprocedure with coverage for hbase:meta (I ran into this issue repeatedly in internal testing purging masterprocwals on a large test cluster). Worse, when master startup cannot find an online hbase:meta, it exits after exhausting the RPC retries.
So, we need a holding-pattern for master startup if hbase:meta is not online if only so an operator can schedule an assign for meta or so they can assign fixup procedures (HBASE-20786 has discussion on why we cannot just auto-schedule an assign of meta).
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)