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From "Tommaso Teofili (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HAMA-482) LocalBSPRunner cannot deliver multiple messages to the same peer
Date Tue, 29 Nov 2011 20:25:40 GMT

     [ https://issues.apache.org/jira/browse/HAMA-482?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tommaso Teofili resolved HAMA-482.
----------------------------------

    Resolution: Fixed

fixed in r1208054
                
> LocalBSPRunner cannot deliver multiple messages to the same peer 
> -----------------------------------------------------------------
>
>                 Key: HAMA-482
>                 URL: https://issues.apache.org/jira/browse/HAMA-482
>             Project: Hama
>          Issue Type: Bug
>            Reporter: Tommaso Teofili
>            Assignee: Tommaso Teofili
>             Fix For: 0.4.0
>
>
> the line 331 of LocalBSPRunner contains a warning which may result in bugs with multiple
messages.
> In fact 
> {code}
> LinkedList<BSPMessage> msgs = localOutgoingMessages.get(peerName);
> {code}
> is trying to get a List of BSPMessage instances from a localOutgoingMessages of type
{code}HashMap<InetSocketAddress, LinkedList<BSPMessage>>{code}.
> It seems to me there is problem as peerName is a String, not a InetSocketAddress and
in fact my debugging session highlighted that get() method to result always to return a null
object.
> The quick fix seems to be putting the lines 337-341 :
> {code}
>       InetSocketAddress inetSocketAddress = socketCache.get(peerName);
>       if (inetSocketAddress == null) {
>         inetSocketAddress = BSPNetUtils.getAddress(peerName);
>         socketCache.put(peerName, inetSocketAddress);
>       }
> {code}
> upmost in the method and then call 
> {code}
> LinkedList<BSPMessage> msgs = localOutgoingMessages.get(inetSocketAddress);
> {code}
> This was highlighted when dealing with multiple messages sent to a same peer in local
mode (only the last msg was actually stored in the outGoingMessages item for that peer).

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