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https://issues.apache.org/jira/browse/HBASE-16302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15903779#comment-15903779
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Hadoop QA commented on HBASE-16302:
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| (x) *{color:red}-1 overall{color}* |
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|| Vote || Subsystem || Runtime || Comment ||
| {color:blue}0{color} | {color:blue} reexec {color} | {color:blue} 0m 0s
{color} | {color:blue} Docker mode activated. {color} |
| {color:red}-1{color} | {color:red} patch {color} | {color:red} 0m 6s {color}
| {color:red} HBASE-16302 does not apply to master. Rebase required? Wrong
Branch? See https://yetus.apache.org/documentation/0.3.0/precommit-patchnames
for help. {color} |
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|| Subsystem || Report/Notes ||
| JIRA Patch URL |
https://issues.apache.org/jira/secure/attachment/12839904/HBASE-16302.patch.v0.patch
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| JIRA Issue | HBASE-16302 |
| Console output |
https://builds.apache.org/job/PreCommit-HBASE-Build/6044/console |
| Powered by | Apache Yetus 0.3.0 http://yetus.apache.org |
This message was automatically generated.
> age of last shipped op and age of last applied op should be histograms
> ----------------------------------------------------------------------
>
> Key: HBASE-16302
> URL: https://issues.apache.org/jira/browse/HBASE-16302
> Project: HBase
> Issue Type: Improvement
> Components: Replication
> Reporter: Ashu Pachauri
> Assignee: Ashu Pachauri
> Fix For: 2.0.0, 1.4.0
>
> Attachments: HBASE-16302.patch.v0.patch
>
>
> Replication exports metric ageOfLastShippedOp as an indication of how much
> replication is lagging. But, with multiwal enabled, it's not representative
> because replication could be lagging for a long time for one wal group
> (something wrong with a particular region) while being fine for others. The
> ageOfLastShippedOp becomes a useless metric for alerting in such a case.
> Also, since there is no mapping between individual replication sources and
> replication sinks, the age of last applied op can be a highly spiky metric if
> only certain replication sources are lagging.
> We should use histograms for these metrics and use maximum value of this
> histogram to report replication lag when building stats.
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