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From "Emmanuel Lecharny (JIRA)" <j...@apache.org>
Subject [jira] Commented: (DIRSERVER-1384) Abandonned requests are not abandonned...
Date Thu, 23 Jul 2009 22:30:14 GMT

    [ https://issues.apache.org/jira/browse/DIRSERVER-1384?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12734821#action_12734821
] 

Emmanuel Lecharny commented on DIRSERVER-1384:
----------------------------------------------

So after half a day investingating this issue, here is what I found :
- The way the MINA exectoruFilter works makes it impossible for the AbandonRequest to be processed
unless the previous SearchRequest is fully processed, which is insane.
- there were a hell of a bigger problem, though : as we were blocked in the executor until
the SearchRequest was totally processed, all the responses were enqueued. That means we had
thousands of SearchResultEntries stacked somewhere, waiting for the SR to return. That explains
why Kiran had an OOM with 10000 searches, as the comment in the tests stated  :

        // I tried with 10000 entries but only to encounter a OOM :(
        // TODO test this with higher number of entries to actually let the server abort
        // the operation
- This could have led to fast OOM for huge requests. The way to fix that was to simply modifiy
the Executor in order to only filter the MESSAGE_RECEIVED, so that the WriteRequest are send
back to the client asap.
- Know, we still have the problem about the abandonRequest which can't be processed while
the SearchRequest is not finished. May be using an UnorderedThreadPoolExecutor can help ?

> Abandonned requests are not abandonned...
> -----------------------------------------
>
>                 Key: DIRSERVER-1384
>                 URL: https://issues.apache.org/jira/browse/DIRSERVER-1384
>             Project: Directory ApacheDS
>          Issue Type: Bug
>    Affects Versions: 1.5.4
>            Reporter: Emmanuel Lecharny
>            Priority: Critical
>             Fix For: 1.5.5
>
>
> The AbandonRequest is correctly handled, but the way the search is now handled makes
the abandon request to be ignored.

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