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From "Atul Bisaria (JIRA)" <>
Subject [jira] [Commented] (CXF-6239) Out of memory when using Async connections in Apache CXF
Date Tue, 10 Mar 2015 08:27:38 GMT


Atul Bisaria commented on CXF-6239:


I don't suspect permanent clogging to be the reason for OOM because firstly we are testing
on same loads that we support in our application Secondly, even at lower loads OOM still occurs
but a little late as compared to with high loads.

The webservice client that we use is an OSGi bundle running on Equinox OSGi container.


> Out of memory when using Async connections in Apache CXF
> --------------------------------------------------------
>                 Key: CXF-6239
>                 URL:
>             Project: CXF
>          Issue Type: Bug
>          Components: Configuration, Transports
>    Affects Versions: 3.0.2
>            Reporter: Atul Bisaria
>            Priority: Critical
>              Labels: performance
>         Attachments: SnipImage1.JPG, SnipImage2.JPG
> We are creating a webservice client using Apache CXF version 3.0.2. We are using CXF's
async based transport as described in
Following is the code snippet from our application:
> ---------------------------------------------------------------------------------------------
>     Client proxy = ClientProxy.getClient(tisInterface);
>     proxy.getBus().setProperty(AsyncHTTPConduitFactory.USE_POLICY, UseAsyncPolicy.ALWAYS);
>     proxy.getBus().setProperty(AsyncHTTPConduitFactory.MAX_CONNECTIONS, parConfig.getOnlineNotificationThreadCount());
>     HTTPConduit conduit = (HTTPConduit) proxy.getConduit();
>     HTTPClientPolicy httpClientPolicy = new HTTPClientPolicy();
>     httpClientPolicy.setReceiveTimeout(parConfig.getTimeout() * 1000);
>     conduit.setClient(httpClientPolicy);
> ------------------------------------------------------------------------------------------
> With above configuration we are running a load of around 200 requests/second.
> On running this load we observe on Java memory analyser tool JVisualVM that heap size
keeps on increasing continuously and after some time results in Java out of memory error.
> We have refactored our code to make sure that all the objects created by our application
are properly garbage collected. The heap dump generated from JVisualVM shows that there are
some classes used within Apache CXF library which might be causing this issue.
> Almost 94% of memory is retained by object of class org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager
> Is this an issue with the async transport provided by Apache CXF or we are missing something
in code or configuration?
> Another observation is that when we use UseAsyncPolicy.NEVER instead of UseAsyncPolicy.ALWAYS
in above code, the out of memory problem does not occur, but then the value set in AsyncHTTPConduitFactory.MAX_CONNECTIONS
property does not work.

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