[jira] [Commented] (HBASE-21191) Add a holding-pattern if no assign for meta or namespace (Can happen if masterprocwals have been cleared).

["Hudson (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-21191?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16671112#comment-16671112 ] 

Hudson commented on HBASE-21191:
--------------------------------

Results for branch branch-2.0
	[build #1045 on builds.a.o|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.0/1045/]: (x) *{color:red}-1 overall{color}*
----
details (if available):

(/) {color:green}+1 general checks{color}
-- For more information [see general report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.0/1045//General_Nightly_Build_Report/]




(x) {color:red}-1 jdk8 hadoop2 checks{color}
-- For more information [see jdk8 (hadoop2) report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.0/1045//JDK8_Nightly_Build_Report_(Hadoop2)/]


(x) {color:red}-1 jdk8 hadoop3 checks{color}
-- For more information [see jdk8 (hadoop3) report|https://builds.apache.org/job/HBase%20Nightly/job/branch-2.0/1045//JDK8_Nightly_Build_Report_(Hadoop3)/]


(/) {color:green}+1 source release artifact{color}
-- See build output for details.


> 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
>            Priority: Major
>             Fix For: 2.1.1, 2.0.3
>
>         Attachments: HBASE-21191.branch-2.0.001.patch, HBASE-21191.branch-2.1.001.patch, HBASE-21191.branch-2.1.002.patch, HBASE-21191.branch-2.1.003.patch, HBASE-21191.branch-2.1.004.patch, HBASE-21191.branch-2.1.005.patch, HBASE-21191.branch-2.1.006.patch, HBASE-21191.branch-2.1.007.patch
>
>
> 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-21035 has discussion on why we cannot just auto-schedule an assign of meta).



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)