On Tue, Jun 23, 2009 at 10:24:36AM +0530, Dimuthu Gamage wrote:
> Hi,
> I'm using http-client version 3.1. I got a warning "HttpConnectionManager is
> null. Connection cannot be released." when I tried to shutdown
> MultiThreadedHttpConnectionManager after doing a 'put' operation. (In fact
> I'm using httpclient through abdera client, so this happens inside the
> abdera client teardown() function.
>
> When I debug I found it hits the following lines inside,
> MultiThreadedHttpConnectionManager.
> shutdownCheckedOutConnections(ConnectionPool connectionPool)
>
> connection.setHttpConnectionManager(null);
> connection.releaseConnection();
>
> Inside the first call it set this.httpConnectionManager = null and in the
> second call, it has logic similar to this,
> if (httpConnectionManager != null) {
> // some stuff
> else {
> LOG.warn("HttpConnectionManager is null. Connection cannot be
> released.");
> }
>
> Does this do any harm to the behaviour of the shutdown operation, or should
> I ignore calling it?
This seems to be harmless, however it does represent an issue with HttpClient
3.x connection management code. I would strongly recommend upgrading to
HttpClient 4.0
> Is it fixed in newer versions?
>
HttpClient 4.0 has a very different and massively better connection management
code, so most likely the issue is no longer there.
Oleg
> I would be greatful If you can answer these problems.
>
> --
> Thanks in advance,
> Dimuthu Gamage
>
> http://www.dimuthu.org
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