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List:       xmlrpc-dev
Subject:    [jira] Created: (XMLRPC-169) XmlRpcClient creates a new connection
From:       "Alan Burlison (JIRA)" <xmlrpc-dev () ws ! apache ! org>
Date:       2009-05-04 17:50:30
Message-ID: 1879243939.1241459430339.JavaMail.jira () brutus
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XmlRpcClient creates a new connection for every request.
--------------------------------------------------------

                 Key: XMLRPC-169
                 URL: https://issues.apache.org/jira/browse/XMLRPC-169
             Project: XML-RPC
          Issue Type: Bug
          Components: Source
    Affects Versions: 3.1.3
         Environment: Solaris
            Reporter: Alan Burlison


An isnstance of XmlRpcClient 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 a total waste of \
time.

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