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Posted to commits@cassandra.apache.org by "Stu Hood (JIRA)" <ji...@apache.org> on 2011/07/28 20:34:09 UTC
[jira] [Issue Comment Edited] (CASSANDRA-2858) make request
dropping more accurate
[ https://issues.apache.org/jira/browse/CASSANDRA-2858?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13072473#comment-13072473 ]
Stu Hood edited comment on CASSANDRA-2858 at 7/28/11 6:32 PM:
--------------------------------------------------------------
There are a few issues here:
* The originally mentioned issue of not having an accurate timeout on the server side
** Add a creation time on the client side? Set the remaining time immediately before serialization?
* The ExpiringMap of callbacks on the client side always waits until the RPC timeout to expire messages
** The Callback could eagerly expire itself from the map when it is is satisfied
* A client thread calling get() on a callback has a timeout independent from the timeout for the Callback in the ExpiringMap: they can become disconnected
** One way to solve that would be to change the IAsyncCallback interface to be more like a Future, such that it is notified when it expires, and could kill anyone blocking on get() with a TimeoutException
was (Author: stuhood):
There are a few issues here:
* The originally mentioned issue of not having an accurate timeout on the server side
* Add a creation time on the client side? Set the remaining time immediately before serialization?
* The ExpiringMap of callbacks on the client side always waits until the RPC timeout to expire messages
* The Callback could eagerly expire itself from the map when it is is satisfied
* A client thread calling get() on a callback has a timeout independent from the timeout for the Callback in the ExpiringMap: they can become disconnected
* One way to solve that would be to change the IAsyncCallback interface to be more like a Future, such that it is notified when it expires, and could kill anyone blocking on get() with a TimeoutException
> make request dropping more accurate
> -----------------------------------
>
> Key: CASSANDRA-2858
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2858
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Ryan King
> Assignee: Melvin Wang
> Priority: Minor
>
> Based on the discussion in https://issues.apache.org/jira/browse/CASSANDRA-2819, we can make the bookkeeping for request times more accurate.
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