[jira] [Commented] (HBASE-17537) Remove Queue#isAvailable() since we have waits/wakes after HBASE-17067

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

    [ https://issues.apache.org/jira/browse/HBASE-17537?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16035667#comment-16035667 ] 

stack commented on HBASE-17537:
-------------------------------

Rebase and updated @appy patch.

> Remove Queue#isAvailable() since we have waits/wakes after HBASE-17067
> ----------------------------------------------------------------------
>
>                 Key: HBASE-17537
>                 URL: https://issues.apache.org/jira/browse/HBASE-17537
>             Project: HBase
>          Issue Type: Sub-task
>          Components: master, proc-v2
>            Reporter: Appy
>            Assignee: Appy
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: HBASE-17537.master.001.patch, HBASE-17537.master.002.patch
>
>
> Earlier, run-queues could have empty queues or queues for which exclusive locks are already taken. Thus poll() on table/server run-queue might have returned a Queue which didn't have any valid procs to run.
> With wait/wake on exclusive locks doing {removeFrom|addTo}RunQueue and poll removing queues when last element is removed, i think we can remove this function now.
> (am finding these things when working on a larger patch, but there are changes like this which seem too critical to mess up, so am creating smaller focused patches for them).



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