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From "Dave Brosius (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4227) StorageProxy throws NPEs for when there's no hostids for a target
Date Tue, 22 May 2012 23:52:41 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4227?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13281323#comment-13281323
] 

Dave Brosius commented on CASSANDRA-4227:
-----------------------------------------

committed as bd32d4f0b9f0f88fed97e8ddf2ee41b5b048d31d
                
> StorageProxy throws NPEs for when there's no hostids for a target
> -----------------------------------------------------------------
>
>                 Key: CASSANDRA-4227
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4227
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>            Reporter: Dave Brosius
>            Priority: Trivial
>             Fix For: 1.2
>
>         Attachments: 4227_drop_hints.txt, 4227_guard_against_npes_for_old_gossip_versions.diff
>
>
> On trunk...
> if there is no host id due to an old node, an info log is generated, but the code continues
to use the null host id causing NPEs in decompose... Should this bypass this code, or perhaps
can the plain ip address be used in this case? don't know.
> as follows...
>                     UUID hostId = StorageService.instance.getTokenMetadata().getHostId(target);
>                     if ((hostId == null) && (Gossiper.instance.getVersion(target)
< MessagingService.VERSION_12))
>                         logger.info("Unable to store hint for host with missing ID, {}
(old node?)", target.toString());
>                     RowMutation hintedMutation = RowMutation.hintFor(mutation, ByteBuffer.wrap(UUIDGen.decompose(hostId)));
>                     hintedMutation.apply();

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