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From Oleg Kalnichevski <ol...@apache.org>
Subject Re: HttpClientBuilder Memory Leak
Date Tue, 02 Feb 2016 20:36:15 GMT
On Tue, 2016-02-02 at 15:29 -0500, Dan Quaroni wrote:
> What version of HttpClient are you using?  I cut the sleep down to 1ms and
> have had it running for 25 minutes and am not observing any such memory
> leak.
> 

If one takes even a cursory look at the memory profile one can clearly
see that out several dozen classes on the heap only one class belongs to
HttpCient - CPool and there are only ~900 instances of that class
compared to millions of instances of other classes.

Oleg

> On Tue, Feb 2, 2016 at 3:21 PM, Oleg Kalnichevski <olegk@apache.org> wrote:
> 
> > On Tue, 2016-02-02 at 21:16 +0100, David Skalka wrote:
> > > what is it "own data" ?
> > >
> >
> > https://drive.google.com/open?id=0B8cERbS5JTTtZkVpWmhVWS11UkU
> >
> > Oleg
> >
> >
> > > 2016-02-02 21:11 GMT+01:00 Oleg Kalnichevski <olegk@apache.org>:
> > >
> > > > On Tue, 2016-02-02 at 20:58 +0100, David Skalka wrote:
> > > > > it is simple test application with one while. here is whole source
> > code:
> > > > >
> > > >
> > > > Have you looked at your own data?
> > > >
> > > > Oleg
> > > >
> > > > >
> > > > > import java.io.IOException;
> > > > >
> > > > > import org.apache.http.impl.client.CloseableHttpClient;
> > > > > import org.apache.http.impl.client.HttpClientBuilder;
> > > > >
> > > > >
> > > > > public class Program {
> > > > >
> > > > >     public static void main(String[] args) throws IOException,
> > > > > InterruptedException {
> > > > >
> > > > >         while(true){
> > > > >             CloseableHttpClient httpclient =
> > > > > HttpClientBuilder.create().build();
> > > > >             httpclient.close();
> > > > >             Thread.sleep(5);
> > > > >         }
> > > > >
> > > > >
> > > > >     }
> > > > >
> > > > > }
> > > > >
> > > > >
> > > > > 2016-02-02 20:51 GMT+01:00 Oleg Kalnichevski <olegk@apache.org>:
> > > > >
> > > > > > On Tue, 2016-02-02 at 20:42 +0100, David Skalka wrote:
> > > > > > > sorry i dont understand you. What do you mean by "what
does this
> > all
> > > > tell
> > > > > > > you" ?
> > > > > > >
> > > > > >
> > > > > > Have you taken even a cursory look at your own data?
> > > > > >
> > > > > > What makes you think there is a leak in HttpClient?
> > > > > >
> > > > > > Oleg
> > > > > >
> > > > > > > 2016-02-02 20:21 GMT+01:00 Oleg Kalnichevski <olegk@apache.org>:
> > > > > > >
> > > > > > > > On Tue, 2016-02-02 at 19:30 +0100, David Skalka wrote:
> > > > > > > > > Here is long running snapshot with types
> > > > > > > > >
> > > > > > > > >
> > https://drive.google.com/open?id=0B8cERbS5JTTtZkVpWmhVWS11UkU
> > > > > > > >
> > > > > > > > And what does this all tell you?
> > > > > > > >
> > > > > > > > Oleg
> > > > > > > >
> > > > > > > > >
> > > > > > > > > 2016-02-02 17:22 GMT+01:00 Gary Gregory <
> > garydgregory@gmail.com
> > > > >:
> > > > > > > > >
> > > > > > > > > > Can you look and see what kind of objects
are retained?
> > > > > > > > > >
> > > > > > > > > > Gary
> > > > > > > > > > On Feb 2, 2016 2:33 AM, "David Skalka" <
> > david.skalka@gmail.com
> > > > >
> > > > > > wrote:
> > > > > > > > > >
> > > > > > > > > > > Why this code causes a memory leak?
> > > > > > > > > > >
> > > > > > > > > > > code:
> > > > > > > > > > >
> > > > > > > > > > > *while(true){*
> > > > > > > > > > > * CloseableHttpClient httpclient =
> > > > > > > > HttpClientBuilder.create().build();*
> > > > > > > > > > > * httpclient.close();*
> > > > > > > > > > > * Thread.sleep(5);*
> > > > > > > > > > > * }*
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > > > > > > Here is a graph of memory allocation:
> > > > > > > > > > >
> > > > > > > > > > >
> > > > > > https://drive.google.com/file/d/0B8cERbS5JTTtMnUyVXJNZDRFbHM/view
> > > > > > > > > > >
> > > > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
> > > > > > > >
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> > > > > >
> > > > > >
> > > > > >
> > > > > >
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> 



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