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Posted to dev@hc.apache.org by "Asankha C. Perera (JIRA)" <ji...@apache.org> on 2011/06/27 16:09:47 UTC
[jira] [Commented] (HTTPCORE-261) Improve Socket Timeout Handling
support when connections are being kept alive and re-used
[ https://issues.apache.org/jira/browse/HTTPCORE-261?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13055564#comment-13055564 ]
Asankha C. Perera commented on HTTPCORE-261:
--------------------------------------------
Oleg
I am seeing some unit test failures in my code with the stack trace:
Caused by: java.lang.NullPointerException
at org.apache.http.impl.nio.reactor.AbstractIOReactor.timeoutCheck(AbstractIOReactor.java:488)
at org.apache.http.impl.nio.reactor.BaseIOReactor.validate(BaseIOReactor.java:205)
at org.apache.http.impl.nio.reactor.AbstractIOReactor.execute(AbstractIOReactor.java:282)
at org.apache.http.impl.nio.reactor.BaseIOReactor.execute(BaseIOReactor.java:104)
at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor$Worker.run(AbstractMultiworkerIOReactor.java:542)
... 1 more
I am yet to dive deep into this, but thought you may be able to quickly determine the cause
thanks
asankha
> Improve Socket Timeout Handling support when connections are being kept alive and re-used
> -----------------------------------------------------------------------------------------
>
> Key: HTTPCORE-261
> URL: https://issues.apache.org/jira/browse/HTTPCORE-261
> Project: HttpComponents HttpCore
> Issue Type: Bug
> Components: HttpCore NIO
> Affects Versions: 4.1.1
> Reporter: Asankha C. Perera
> Assignee: Asankha C. Perera
> Priority: Minor
> Fix For: 4.1.2
>
> Attachments: HTTPCORE-261-v4.1.x.patch, HTTPCORE-261-v4.2-alpha1.patch
>
>
> This is an enhancement request to improve the support to keep connections alive, and re-use them effectively without letting them timeout unnecessarily
> The problem can be described against v4.1.1 as follows:
> 1. We establish an outgoing connection and set the socket timeout to 5 seconds (Time = t0 )
> 2. After receiving the response, we want to keep the socket open for reuse for 30 seconds, and we update the timeout (Time = t1)
> 3. After 6 seconds since #2 above, we get an opportunity to reuse this connection, and again we set the socket timeout to 5 seconds
> 4. Almost immediately, the BaseIOReactor timeout check most definitely notices that the time the socket was last used (t1) is over 5 seconds from the current time, and times out the socket
> See http://markmail.org/message/zgnrquosjahqog6f for more details
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