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https://issues.apache.org/jira/browse/HTTPCORE-362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Oleg Kalnichevski resolved HTTPCORE-362.
----------------------------------------

       Resolution: Fixed
    Fix Version/s: 4.3.1

Len (I hope I got your first name right)

I ended up committing a different, more conservative fix [1]. Pool per route 
map will get purged only as a result of #closeExpired and #closeIdle. Empty 
pools will not get purged upon connection release, as it may cause unnecessary 
intermediate garbage.

Your app will need to manually invoke #closeExpired during a long web crawl. 

Oleg

[1] http://svn.apache.org/r1544185

> Memory leak in rout key of AbstractConnPool's routeToPool 
> ----------------------------------------------------------
>
>                 Key: HTTPCORE-362
>                 URL: https://issues.apache.org/jira/browse/HTTPCORE-362
>             Project: HttpComponents HttpCore
>          Issue Type: Bug
>            Reporter: len.liu
>             Fix For: 4.3.1
>
>         Attachments: HTTPCORE-362.patch
>
>
> routeToPool which is a map,could not  release any route key anytime, it only 
> releases value object based on the setting number of 'maxTotal' and 
> 'MaxPerRoute',  so the routeToPool(exactly the route keys), will use larger 
> and larger memory util JVM is out of memory.
> This problem will happened when requesting lots of different  HttpHost.



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