[jira] [Commented] (TS-1962) keepalive post issues

["Bryan Call (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/TS-1962?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13704259#comment-13704259 ] 

Bryan Call commented on TS-1962:
--------------------------------

Before the fix:

{code}
# client
[bcall@localhost ~]$ curl -v -H 'Host: foo.yahoo.com' -D - -o /dev/null -s -d skill=lousy  http://localhost:8080/

# server
[bcall@localhost trafficserver]$ sudo /usr/local/bin/traffic_server -T http_ss
[Jul  9 23:35:34.140] Server {0x10d08f000} DEBUG: (http_ss) [2] session born, netvc 0x7facf384de80
[Jul  9 23:35:36.379] Server {0x10d08f000} DEBUG: (http_ss) [2] [release session] session placed into shared pool
[Jul  9 23:35:49.765] Server {0x10d08f000} DEBUG: (http_ss) [2] [session_bucket] session received io notice [VC_EVENT_EOS]
[Jul  9 23:35:49.765] Server {0x10d08f000} DEBUG: (http_ss) [2] session closed
{code}
                
> keepalive post issues
> ---------------------
>
>                 Key: TS-1962
>                 URL: https://issues.apache.org/jira/browse/TS-1962
>             Project: Traffic Server
>          Issue Type: Bug
>          Components: HTTP
>            Reporter: Thomas Jackson
>            Assignee: Bryan Call
>             Fix For: 3.3.5
>
>
> I've been running ATS at the edge with keepalive enabled. After some digging I found that ATS creates new connections (by default) for all post requests, instead of re-using a connection. The comment in the code looks like this was (is?) because of some race condition inside ATS. I noticed that there is a config option (proxy.config.http.keep_alive_ post_out) which enables the connection re-use for post requests, and it seems to work. Does anyone have any knowledge/experience with this configuration option? Or anything about this race condition?
> In addition to the possible bug, if you leave it on the default (new connection per post) it returns the connection to the keep alive pool and I notice 10x latency on all post requests.

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