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From "Aidan Skinner (JIRA)" <qpid-...@incubator.apache.org>
Subject [jira] Updated: (QPID-1823) Session creation for more than 64K channelId causes timeout
Date Mon, 20 Apr 2009 16:13:49 GMT

     [ https://issues.apache.org/jira/browse/QPID-1823?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aidan Skinner updated QPID-1823:
--------------------------------

    Attachment:     (was: QPID-1823.patch)

> Session creation for more than 64K channelId causes timeout 
> ------------------------------------------------------------
>
>                 Key: QPID-1823
>                 URL: https://issues.apache.org/jira/browse/QPID-1823
>             Project: Qpid
>          Issue Type: Bug
>          Components: Java Client
>    Affects Versions: 0.5
>            Reporter: Aidan Skinner
>            Assignee: Aidan Skinner
>             Fix For: 0.5
>
>         Attachments: QPID-1823.patch
>
>
> Mule connectors create a session for each message send. Once we get beyond 64K this causes
a problem since channelId gets converted in AMQFrame.writeUnsignedShort and loops back round
to 0. This is a problem since the channelId that the connection is holding does not get reset
to the new value. It's also not ideal since channel 0 is the control channel.
> So, proposed solution is to:
> - check the channelId on session creation to see if greater than the channelMax value
> - if greater, then create an array holding a boolean for each index position (i.e. integer)
false meaning channelId available and true if in use.
> - we can also also reserve channel 0 for control channel
> - so, for sessions created after the channel max value is hit then we perform a lookup/add
on session creation and a remove on session close
> - thus the cost associated is marginal and only introduced after the 64K+1 session is
opened

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