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Posted to dev@hc.apache.org by "Jasper Rosenberg (JIRA)" <ji...@apache.org> on 2014/02/04 04:12:08 UTC
[jira] [Commented] (HTTPCLIENT-1453)
PoolingHttpClientConnectionManager thread safety
[ https://issues.apache.org/jira/browse/HTTPCLIENT-1453?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13890323#comment-13890323 ]
Jasper Rosenberg commented on HTTPCLIENT-1453:
----------------------------------------------
I have seen the same issue calling PoolingHttpClientConnectionManager.closeIdleConnections(). Given that it also ends up calling org.apache.http.pool.AbstractConnPool.purgePoolMap(AbstractConnPool.java:469), I'm assuming this is handled as well? Thanks.
Caused by: java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(HashMap.java:926)
at java.util.HashMap$EntryIterator.next(HashMap.java:966)
at java.util.HashMap$EntryIterator.next(HashMap.java:964)
at org.apache.http.pool.AbstractConnPool.purgePoolMap(AbstractConnPool.java:469)
at org.apache.http.pool.AbstractConnPool.closeIdle(AbstractConnPool.java:500)
at org.apache.http.impl.conn.PoolingHttpClientConnectionManager.closeIdleConnections(PoolingHttpClientConnectionManager.java:358)
> PoolingHttpClientConnectionManager thread safety
> ------------------------------------------------
>
> Key: HTTPCLIENT-1453
> URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1453
> Project: HttpComponents HttpClient
> Issue Type: Bug
> Components: HttpConn
> Affects Versions: 4.3.2
> Environment: Windows 8.1 x64
> java version "1.7.0_45"
> Java(TM) SE Runtime Environment (build 1.7.0_45-b18)
> Java HotSpot(TM) 64-Bit Server VM (build 24.45-b08, mixed mode)
> Reporter: Rahim Alizada
> Fix For: 4.3.3
>
>
> Although the PoolingHttpClientConnectionManager is marked as ThreadSafe, connectionManager.closeExpiredConnections() call from multiple threads causes ConcurrentModificationException.
> java.util.ConcurrentModificationException
> at java.util.HashMap$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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