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https://issues.apache.org/jira/browse/XMLRPC-169?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Alan Burlison updated XMLRPC-169:
---------------------------------

      Priority: Minor  (was: Major)
    Issue Type: Improvement  (was: Bug)

> XmlRpcSunHttpTransport creates a new connection for every request.
> ------------------------------------------------------------------
>
>                 Key: XMLRPC-169
>                 URL: https://issues.apache.org/jira/browse/XMLRPC-169
>             Project: XML-RPC
>          Issue Type: Improvement
>          Components: Source
>    Affects Versions: 3.1.3
>         Environment: Solaris
>            Reporter: Alan Burlison
>            Priority: Minor
>
> An instance of XmlRpcSunHttpTransport creates a new connection to the server 
> for every request that is made via it.  That's *horrendously* expensive where 
> the connection is a SSL connection.
> Here's a trace, note the repeated connect() calls.
> /2:   connect(20, 0xFE32E4D0, 32, SOV_DEFAULT)        = 0
> /2:   getsockname(20, 0xFE32E4D0, 0xFE32E618, SOV_DEFAULT) = 0
> /2:   setsockopt(20, tcp, TCP_NODELAY, 0xFE32E768, 4, SOV_DEFAULT) = 0
> /2:   send(20, " P O S T   /   H T T P /".., 283, 0)  = 283
> /2:   send(20, " < ? x m l   v e r s i o".., 215, 0)  = 215
> /2:   read(20, " H T T P / 1 . 0   2 0 0".., 8192)    = 84
> /2:   read(20, " < ? x m l   v e r s i o".., 8108)    = 202
> /2:   ioctl(20, FIONREAD, 0xFE32E684)                 = 0
> /2:   fcntl(21, F_DUP2FD, 0x00000014)                 = 20
> /2:   close(20)                                       = 0
> /2:   so_socket(PF_INET6, SOCK_STREAM, IPPROTO_IP, 0x00000000, SOV_DEFAULT) = 
> 20
> /2:   connect(20, 0xFE32E4D0, 32, SOV_DEFAULT)        = 0
> /2:   getsockname(20, 0xFE32E4D0, 0xFE32E618, SOV_DEFAULT) = 0
> /2:   setsockopt(20, tcp, TCP_NODELAY, 0xFE32E768, 4, SOV_DEFAULT) = 0
> /2:   send(20, " P O S T   /   H T T P /".., 283, 0)  = 283
> /2:   send(20, " < ? x m l   v e r s i o".., 215, 0)  = 215
> /2:   read(20, " H T T P / 1 . 0   2 0 0".., 8192)    = 84
> /2:   read(20, " < ? x m l   v e r s i o".., 8108)    = 202
> /2:   ioctl(20, FIONREAD, 0xFE32E684)                 = 0
> /2:   fcntl(21, F_DUP2FD, 0x00000014)                 = 20
> /2:   close(20)                                       = 0
> /2:   so_socket(PF_INET6, SOCK_STREAM, IPPROTO_IP, 0x00000000, SOV_DEFAULT) = 
> 20
> /2:   connect(20, 0xFE32E4D0, 32, SOV_DEFAULT)        = 0
> /2:   getsockname(20, 0xFE32E4D0, 0xFE32E618, SOV_DEFAULT) = 0
> /2:   setsockopt(20, tcp, TCP_NODELAY, 0xFE32E768, 4, SOV_DEFAULT) = 0
> /2:   send(20, " P O S T   /   H T T P /".., 283, 0)  = 283
> /2:   send(20, " < ? x m l   v e r s i o".., 215, 0)  = 215
> /2:   read(20, " H T T P / 1 . 0   2 0 0".., 8192)    = 84
> /2:   read(20, " < ? x m l   v e r s i o".., 8108)    = 202
> /2:   ioctl(20, FIONREAD, 0xFE32E684)                 = 0
> /2:   fcntl(21, F_DUP2FD, 0x00000014)                 = 20
> /2:   close(20)                                       = 0
> /2:   so_socket(PF_INET6, SOCK_STREAM, IPPROTO_IP, 0x00000000, SOV_DEFAULT) = 
> 20
> /2:   connect(20, 0xFE32E4D0, 32, SOV_DEFAULT)        = 0
> /2:   getsockname(20, 0xFE32E4D0, 0xFE32E618, SOV_DEFAULT) = 0
> /2:   setsockopt(20, tcp, TCP_NODELAY, 0xFE32E768, 4, SOV_DEFAULT) = 0
> /2:   send(20, " P O S T   /   H T T P /".., 283, 0)  = 283
> /2:   send(20, " < ? x m l   v e r s i o".., 215, 0)  = 215
> /2:   read(20, " H T T P / 1 . 0   2 0 0".., 8192)    = 84
> /2:   read(20, " < ? x m l   v e r s i o".., 8108)    = 202
> /2:   ioctl(20, FIONREAD, 0xFE32E684)                 = 0
> /2:   fcntl(21, F_DUP2FD, 0x00000014)                 = 20
> /2:   close(20)                                       = 0
> And if you assume that a major use of the Apache XML-RPC client is with the 
> Apache XML-RPC server, it means the keepalive support in the server is pretty 
> much a waste of time.

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