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https://issues.apache.org/jira/browse/HBASE-25539?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bharath Vissapragada resolved HBASE-25539.
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Resolution: Fixed
> Add metric for age of oldest wal.
> ---------------------------------
>
> Key: HBASE-25539
> URL: https://issues.apache.org/jira/browse/HBASE-25539
> Project: HBase
> Issue Type: Improvement
> Components: metrics, regionserver
> Affects Versions: 3.0.0-alpha-1, 1.6.0, 2.5.0, 2.4.2
> Reporter: Rushabh Shah
> Assignee: Rushabh Shah
> Priority: Major
> Fix For: 3.0.0-alpha-1, 1.7.0, 2.5.0, 2.4.2
>
>
> In our production clusters, we have seen multiple cases where some of the
> wals are lingering in zk replication queues for months and we have no insight
> into it. Recently we fixed one case where wal was getting stuck if it is 0
> size and from old sources. HBASE-25536. It would be helpful if we can have
> some metric which will tell us the age of oldest wal and we can add an alert
> for monitoring purpose.
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