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https://issues.apache.org/jira/browse/HTTPCLIENT-1404?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski resolved HTTPCLIENT-1404.
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Resolution: Won't Fix
> Provide connection pool usage statistics for PoolingClientConnectionManager
> ---------------------------------------------------------------------------
>
> Key: HTTPCLIENT-1404
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1404
> Project: HttpComponents HttpClient
> Issue Type: New Feature
> Components: HttpClient (classic)
> Reporter: Allen Wang
> Priority: Minor
> Fix For: Future
>
>
> For clients that have high request rate to their corresponding services, it
> is critical that the client has an efficient connection pool and reuse free
> connections as often as possible, and is free from bugs like not releasing
> resources from http response that causes low reuse of connections and timed
> out waiting for connection. To meet that requirement, the developers need to
> have insight of current state of the connection pool.
> Connection pool, like any object pool or cache, needs to have statistics for
> fine tuning, like Guava CacheBuilder that provides statics for cache hit
> ratio and many others.
> It will be very beneficial if the PoolingClientConnectionManager provides
> following statistics:
> - count of occurrences that a free entry is obtained when requesting a
> connection
> - count of occurrences that a new entry is created
> - count of occurrences that an entry is released
> - count of occurrences that an entry is deleted
> I was able to provide such statistics for the deprecated
> ThreadSafeClientConnManager in Ribbon:
> https://github.com/Netflix/ribbon/pull/47
> But it seems that PoolingClientConnectionManager does not provide such hooks.
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