[lkml]   [2008]   [Nov]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    Subjecttcp_tw_recycle broken?
    Hey.  Developing a http proxy on fedora 9 (2.6.25) and running into a
    strange issue.

    Having the proxy set up and tear down 6000 tcp connections a second to
    the same test server ip and port,
    it quickly blows up (5 seconds) due to all 30000 ephemeral ports going
    to TIME_WAIT.
    setting tw_recycle=1 fixed the problem, and there are never more than
    a couple hundred ports in TIME_WAIT.


    Changing the load test to alternate between two test server ips, it
    blows up. Connect: can't assign requested address. (note I am not
    binding before hand, I tried
    and binding first to port 0 made no difference - it just blows up then
    during the bind).

    And there are ~28K ports in TIME_WAIT. For example:

    proxy_ip:30000 load_test_1:8080 TIME_WAIT
    proxy_ip:30000 load_test_2:8080 TIME_WAIT
    but most are not duplicates of the same local port.

    What. The. Heck.

    So short of rebuilding the kernel with time_wait as 1 second, is there
    any other way not to brick my proxy?

    Karl Pickett

    Karl Pickett

     \ /
      Last update: 2008-11-15 05:39    [W:0.020 / U:45.244 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site