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From "Jasper Rosenberg (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HTTPCLIENT-1453) PoolingHttpClientConnectionManager thread safety
Date Tue, 04 Feb 2014 12:40:15 GMT

    [ https://issues.apache.org/jira/browse/HTTPCLIENT-1453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13890617#comment-13890617
] 

Jasper Rosenberg commented on HTTPCLIENT-1453:
----------------------------------------------

Hi Oleg. Unfortunately (or fortunately depending on your perspective :) it has only happened
once in production since we updated to 4.3.2 a couple weeks ago, so I think I will just catch
and ignore the exception for now, and then upgrade to 4.3.3 when it comes out.  Thanks!

> PoolingHttpClientConnectionManager thread safety
> ------------------------------------------------
>
>                 Key: HTTPCLIENT-1453
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1453
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpConn
>    Affects Versions: 4.3.2
>         Environment: Windows 8.1 x64
> java version "1.7.0_45"
> Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
> Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
>            Reporter: Rahim Alizada
>             Fix For: 4.3.3
>
>
> Although the PoolingHttpClientConnectionManager is marked as ThreadSafe, connectionManager.closeExpiredConnections()
call from multiple threads causes ConcurrentModificationException.
> java.util.ConcurrentModificationException
> 	at java.util.HashMap$HashIterator.nextEntry(HashMap.java:839)
> 	at java.util.HashMap$EntryIterator.next(HashMap.java:880)
> 	at java.util.HashMap$EntryIterator.next(HashMap.java:878)
> 	at org.apache.http.pool.AbstractConnPool.purgePoolMap(AbstractConnPool.java:469)
> 	at org.apache.http.pool.AbstractConnPool.closeExpired(AbstractConnPool.java:517)
> 	at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.closeExpiredConnections(PoolingHttpClientConnectionManager.java:363)
> 	at com.jyvee.shared.http.HttpHelper.getHttpClient(HttpHelper.java:121)



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