Michael
Could you provide us with additional details on the execution environment
of your application?
(1) What version of HttpClient are you using?
(2) What is the JDK version?
(3) What platform?
(4) How exactly do you measure memory consumption by your application?
(5) Do you set initial and maximum heap size for the JRE?
Oleg
>-- Original Message --
>Reply-To: "Jakarta Commons Developers List" <[EMAIL PROTECTED]>
>Subject: HttpClient -- possible resource leak?
>Date: Wed, 9 Jun 2004 10:43:10 -0400
>From: "Michael Mastroianni" <[EMAIL PROTECTED]>
>To: <[EMAIL PROTECTED]>
>
>
>I have a multi-threaded app, using Httpclient to download a few thousand
>urls at a time. Currently, I have one MultiThreadedHttpConnectionManager,
>which the thread manager creates, and passes around to each of its worker
>threads.
>
>Each thread has a queue of urls, and it creates a new HttpClient, using
the
>ConnectionManager, for each one. I've tried using one, created at construction
>time for each worker thread, and gotten no luck.
>
>The worker threads make executeMethod calls, and I notice that I'm leaking
>a lot of memory (it looks like the memory usage goes up every time I successfully
>download a page). It seems as if perhaps the underlying buffer of the GetMethod
>is not being cleaned up. I'm calling release on the GetMethod in a finally
>block. A relevant piece of code is below:
>
> private void SpiderUrlImpl()
> {
> HttpMethod method = new GetMethod(m_sUrl);
> try
> {
> //if(m_State == null)
> //{
> m_State = new HttpState();
>
> m_State.setCookiePolicy(CookiePolicy.RFC2109);
> //}
>
> m_client.setState(m_State);
> m_client.setConnectionTimeout(m_timeout);
>
> method.setFollowRedirects(true);
> method.setStrictMode(false);
> String responseBody = null;
>
> int iCode = m_client.executeMethod(method);
> responseBody = method.getResponseBodyAsString();
> Header hLoc =
> method.getResponseHeader("Location");
>
> java.io.FileWriter fw = new
> java.io.FileWriter(m_sPath
>+ "\\" + m_sFile);
> fw.write(responseBody);
> w.close();
> }//TODO: LOG STUFF GOES HERE
> catch (org.apache.commons.httpclient.HttpException
>he)
> {
> System.err.println("Http error connecting to
>'" + m_sUrl + "'");
> System.err.println(he.getMessage());
> }
> catch (IOException ioe)
> {
> System.err.println("Unable to connect to '"
+
>m_sUrl + "' or print file + '" + m_sPath + "\\" + m_sFile + "'");
> System.err.println(ioe.getMessage());
> }
> catch(Exception eExc)
> {
> System.err.println(eExc.getMessage());
> }
> finally
> {
> method.releaseConnection();
> }
> }
>}
>
>
>
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