hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Gary Helmling (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-15658) RegionServerCallable / RpcRetryingCaller clear meta cache on retries
Date Tue, 03 May 2016 00:17:13 GMT

     [ https://issues.apache.org/jira/browse/HBASE-15658?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gary Helmling updated HBASE-15658:
----------------------------------
    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

This has been committed to 1.3.0+.

[~busbey] if you want this in 1.2, let me know and I will do a backport JIRA.  It should apply
without any changes.

> RegionServerCallable / RpcRetryingCaller clear meta cache on retries
> --------------------------------------------------------------------
>
>                 Key: HBASE-15658
>                 URL: https://issues.apache.org/jira/browse/HBASE-15658
>             Project: HBase
>          Issue Type: Sub-task
>          Components: Client
>    Affects Versions: 1.2.1
>            Reporter: Gary Helmling
>            Assignee: Gary Helmling
>            Priority: Critical
>             Fix For: 2.0.0, 1.3.0, 1.4.0
>
>         Attachments: hbase-15658.001.patch, hbase-15658.002.patch, hbase-15658.branch-1.3.001.patch
>
>
> When RpcRetryingCaller.callWithRetries() attempts a retry, it calls RetryingCallable.prepare(tries
!= 0).  For RegionServerCallable (and probably others), this will wind up calling RegionLocator.getRegionLocation(reload=true),
which will drop the meta cache for the given region and always go back to meta.
> This is kind of silly, since in the case of exceptions, we already call RetryingCallable.throwable(),
which goes to great pains to only refresh the meta cache when necessary.  Since we are already
doing this on failure, I don't really understand why we are doing duplicate work to refresh
the meta cache on prepare() at all.



--
This message was sent by Atlassian JIRA
(v6.3.4#6332)

Mime
View raw message