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From "Eric Evans (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4384) HintedHandoff can begin before SS knows the hostID
Date Fri, 29 Jun 2012 16:14:44 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13403994#comment-13403994
] 

Eric Evans commented on CASSANDRA-4384:
---------------------------------------

bq. ...so I would prefer this be in LocationInfo with the tokens...

Tokens are now in the {{peers}} columnfamily, keyed by the token with one column for the peer
(inet address).  With vnodes, that will become many-to-one (the endpoints will not be unique).
 Host IDs are one-to-one.  The most straightforward approach seemed to be to create another
columnfamily (peer_ids?), similar to {{peers}}, but keyed by host ID.
                
> HintedHandoff can begin before SS knows the hostID
> --------------------------------------------------
>
>                 Key: CASSANDRA-4384
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4384
>             Project: Cassandra
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 1.2
>            Reporter: Brandon Williams
>            Assignee: Eric Evans
>             Fix For: 1.2
>
>
> Since HH fires from the FD, SS won't quite have the hostId yet:
> {noformat}
>  INFO 18:58:04,196 Started hinted handoff for host: null with IP: /10.179.65.102
>  INFO 18:58:04,197 Node /10.179.65.102 state jump to normal
> ERROR 18:58:04,197 Exception in thread Thread[HintedHandoff:1,1,main]
> java.lang.NullPointerException
>         at org.apache.cassandra.utils.UUIDGen.decompose(UUIDGen.java:120)
>         at org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpointInternal(HintedHandOffManager.java:304)
>         at org.apache.cassandra.db.HintedHandOffManager.deliverHintsToEndpoint(HintedHandOffManager.java:250)
>         at org.apache.cassandra.db.HintedHandOffManager.access$400(HintedHandOffManager.java:87)
>         at org.apache.cassandra.db.HintedHandOffManager$4.runMayThrow(HintedHandOffManager.java:433)
>         at org.apache.cassandra.utils.WrappedRunnable.run(WrappedRunnable.java:26)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
>         at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
>         at java.lang.Thread.run(Thread.java:662)
> {noformat}
> Simple solution seems to be getting the hostId from gossip instead.

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