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https://issues.apache.org/jira/browse/HBASE-25145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17208286#comment-17208286
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Huaxiang Sun commented on HBASE-25145:
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Yeah, [~zhangduo] is right as metaWal always maintains an empty wal file even
when all regions move out, so the issue wont happen. I think we need to
consider to remove the replication source as it will always tail the empty
metaWal (as an improvement).
> WALReader quits if nothing to replicate (and won't restart)
> -----------------------------------------------------------
>
> Key: HBASE-25145
> URL: https://issues.apache.org/jira/browse/HBASE-25145
> Project: HBase
> Issue Type: Sub-task
> Reporter: Michael Stack
> Priority: Major
>
> Noticed by [~huaxiangsun] in his review of HBASE-25055 "Add ReplicationSource
> for meta WALs; add enable/disable w…"
> {quote}bq. Eventually, the meta wal file will be gced and there is no more
> logs in the queue. In that case, the walReader thread will quit. When the
> meta region is moved back, it does not seem that walReader thread will be
> restarted. So it seems that something is broken.
> {quote}
> This issue is about writing a test to run the above scenario and fix any
> probs. found.
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