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From "Oleg Kalnichevski (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HTTPCLIENT-1655) HttpClient 4.4.1 sends RST instead of proper FIN ACK sequence when using non-persistant connections
Date Fri, 05 Jun 2015 09:21:00 GMT

     [ https://issues.apache.org/jira/browse/HTTPCLIENT-1655?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Oleg Kalnichevski resolved HTTPCLIENT-1655.
    Resolution: Fixed

Fixed in SVN trunk and 4.5.x branch. Please review / re-test


> HttpClient 4.4.1 sends RST instead of proper FIN ACK sequence when using non-persistant
> ---------------------------------------------------------------------------------------------------
>                 Key: HTTPCLIENT-1655
>                 URL: https://issues.apache.org/jira/browse/HTTPCLIENT-1655
>             Project: HttpComponents HttpClient
>          Issue Type: Bug
>          Components: HttpClient
>    Affects Versions: 4.4.1
>            Reporter: Alan Silva
>             Fix For: 4.5.1
>         Attachments: KeepAliveTest.java, KeepAliveTestWireLog, NoKeepAliveTest.java,
NonKeepAliveTestWireLog, POC_WITHOUT_keep_alive_WITHOUT_class.pcap, POC_keep_alive_WITHOUT_class.pcap,
> I'm seeing an interesting behavior with HttpClient 4.4.1 GA (latest release as of the
writing of this issue) when trying to make http requests with no keep-alive.
> First, let me post my code for the case in which I try to request using keep-alive.
> [Java code for keepalive test with httpclient 4.4.1 GA | ^KeepAliveTest.java]
> With the code above, everything works great. All my requests are done one the same connection
and we get a nice graceful close with a couple FIN ACKs at the end. The capture is here:
> [Capture of keepalive test with httpclient 4.4.1 GA | ^POC_keep_alive_WITHOUT_class.pcap]
> However, when I try to do the same thing without using keepalive (I set "Connection:
close" in the httpclient and make sure I call close on the httpclient as well at the end of
each request), I see I the client send a reset (RST) signal to the server at the end of the
> The code for the non keepalive test is here:
> [Java code for no keepalive test with httpclient 4.4.1 GA | ^NoKeepAliveTest.java]
> And its capture is here:
> [Capture of no keepalive test with httpclient 4.4.1 GA  |^POC_WITHOUT_keep_alive_WITHOUT_class.pcap]
> I don't understand why the test with non persistent connections isn't gracefully closing
the connection as it does with the persistent use case by sending a FIN,ACK to the server.
It instead chooses to send a RST. Am I doing something wrong?
> I tried the same test for no keep-alive with our legacy code using the now deprecated
"commons-httpclient-3.1.jar" library. I see a proper connection close there.
> [Capture of no keepalive test with commons-httpclient-3.1  |^old_code_mss.pcap]
> I've attached as much info as I can think of but if the wire logs or any other info is
needed, I'd be more than happy to append it. 

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