[jira] [Resolved] (PHOENIX-7988) Idle co-active RegionServer stays wedged in STORE_AND_FORWARD, pinning the group at ACTIVE_NOT_IN_SYNC

["Tanuj Khurana (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/PHOENIX-7988?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tanuj Khurana resolved PHOENIX-7988.
------------------------------------
    Resolution: Fixed

> Idle co-active RegionServer stays wedged in STORE_AND_FORWARD, pinning the group at ACTIVE_NOT_IN_SYNC
> ------------------------------------------------------------------------------------------------------
>
>                 Key: PHOENIX-7988
>                 URL: https://issues.apache.org/jira/browse/PHOENIX-7988
>             Project: Phoenix
>          Issue Type: Sub-task
>            Reporter: Tanuj Khurana
>            Assignee: Tanuj Khurana
>            Priority: Major
>
> An idle RegionServer can stay stuck in STORE_AND_FORWARD mode indefinitely, wedging the whole replication group at ACTIVE_NOT_IN_SYNC, because its promotion guard scans a shared directory instead of a per-RS signal. A RS in STORE_AND_FORWARD promotes back to SYNC_AND_FORWARD via processNoMoreRoundsLeft only when the caught-up guard passes. That guard scanned the next round's shard — a shared directory holding
> every active RS's live OPENFORWRITE rotation writer. Because that shard is essentially never empty while any peer is writing, an idle RS which never processes any file in the OUT directory can remain pinned in STORE_AND_FORWARD, wedging the group at ACTIVE_NOT_IN_SYNC indefinitely.



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