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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HTTPCLIENT-1298) Unable to shutdown executor service used by AsynchronousValidator
Date Thu, 17 Jan 2013 13:36:22 GMT

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-1298?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Oleg Kalnichevski updated HTTPCLIENT-1298:

    Fix Version/s: 4.3 Alpha2

We cannot add #shutdown method to the HttpClient interface, so it may not be easy to fix this
issue in the 4.2.x branch. CloseableHttpClient in the trunk, however, can do extra cleanups
beside the expected shutdown of the connection manager. Have a loot at the CachingHttpClientBuilder
in the caching module and see how it registers an extra Closeable with the underlying CloseableHttpClient
implementation to ensure automatic cleanup of the file cache when the client shuts down. You
could do something very similar for the executor service used by its AsynchronousValidator.

> Unable to shutdown executor service used by AsynchronousValidator
> -----------------------------------------------------------------
>                 Key: HTTPCLIENT-1298
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1298
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: Cache
>    Affects Versions: 4.2.3
>            Reporter: Martin Meinhold
>             Fix For: 4.3 Alpha2
> Currently there is no way to tell the CachingHttpClient to shutdown the executor service
used by its AsynchronousValidator. This could lead to a resource leak, but probably only in
cases when the threads weren't reclaimed by the thread pool. So only when it is actually processing
tasks. As long as the thread pool isn't used, it won't create threads.
> From an application life-cycle point of view there should be a way to explicitly tell
the HttpClient to shutdown and release all resources now regardless whether there are any
outstanding validation requests or not.
> I have a patch against version 4.2.1 which in fact adds a shutdown() method to the HttpClient
and the AsynchronousValidator. Today I saw, there is already a CloseableHttpClient. So do
you need any contribution to fix this? Looks like there is already a plan for that.
> Btw: thanks for already supporting the background validation via the stale-while-revalidate

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