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Posted to dev@hc.apache.org by "Oleg Kalnichevski (JIRA)" <ji...@apache.org> on 2014/01/27 15:30:39 UTC
[jira] [Resolved] (HTTPASYNC-64) Race condition using
CachingHttpAsyncClient
[ https://issues.apache.org/jira/browse/HTTPASYNC-64?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Oleg Kalnichevski resolved HTTPASYNC-64.
----------------------------------------
Resolution: Fixed
This turned out to be a much more severe issue than I had anticipated. I had to rewrite future chaining logic pretty much entirely and had to change way too much I had thought I would have to.
@Rahul
Could you please re-test your application with the latest snapshot?
Oleg
> Race condition using CachingHttpAsyncClient
> -------------------------------------------
>
> Key: HTTPASYNC-64
> URL: https://issues.apache.org/jira/browse/HTTPASYNC-64
> Project: HttpComponents HttpAsyncClient
> Issue Type: Bug
> Affects Versions: 4.0 Final
> Environment: JDK 1.7, macbook pro
> Reporter: Rahul
> Labels: CachingHttpAsyncClient, FutureHttpResponse, concurrency, race-condition
> Fix For: 4.0.1
>
>
> Running into a race condition when using CachingHttpAsyncClient. The async client at times returns null from the FutureHttpResponse obtained from CachingHttpAsyncClient.execute(HttpGet, null)
> In FutureHttpResponse the get() method has the following implementation -
> try {
> getDelegate().get();
> } catch (ExecutionException e) {
> // ignore
> }
> final HttpResponse result = getResponse();
> When the getDelegate().get(); returns, the getResponse() returns null. It seems the thread doing the actual request/response processing still hasn't called "setResponse".
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