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Full Discussion: Port hang issue in AIX Version 5.3
Operating Systems AIX Port hang issue in AIX Version 5.3 Post 302343151 by subharai on Tuesday 11th of August 2009 08:39:17 PM
Old 08-11-2009
Port hang issue in AIX Version 5.3
On AIX platform we are having Weblogic 8.1 as the middleware for an application.

The application is deployed in Weblogic on AIX platform and the server is having 2 dedicated listening ports for any incoming requests.

Output for netstat -an command for the port 30001 is as follows:-

tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.20501 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.47428 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.48077 ESTABLISHED
tcp 0 0 *.30001 *.* LISTEN
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.52664 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.53170 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55643 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55667 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55668 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55669 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55680 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55691 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55694 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55703 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55719 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55753 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55755 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55758 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55761 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55762 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Y.Y.Y.Y.55781 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.54436 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.54891 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.55333 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.31796 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.31979 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.32428 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.59195 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.59314 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.10405 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.59457 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.12872 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.12943 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.39168 ESTABLISHED
tcp4 0 0 X.X.X.X.30001 Z.Z.Z.Z.42803 ESTABLISHED

With time the no. of established connection get increased and as soon as the count reaches more than 300 the port gets hanged.

The only workaround as of now available to us is to bounce the application server to bring up the ports in listening status.

FYI, the ip's Y.Y.Y.Y and Z.Z.Z.Z can be connected through telnet.

Please suggest how to release these established ports without restarting the application.

Let me know if you require any further information.

Thank U in advance.
 

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LEARN ABOUT DEBIAN

valgrind-listener

VALGRIND(1)							   Release 3.7.0						       VALGRIND(1)

NAME

       valgrind-listener - a simple listener program for valgrind log redirection

SYNOPSIS

       valgrind-listener [--exit-at-zero|-e] [port-number]

DESCRIPTION

       valgrind-listener is a tool to be used in conjunction with Valgrind's ability to redirect its commentary output to a network socket (by
       means of the --log-socket option).

       valgrind-listener accepts connections on the specified port and copies whatever it is sent to stdout. It can accept simultaneous
       connections from up to 50 Valgrinded processes. In front of each line of output it prints the current number of active connections in round
       brackets.

       port-number changes the port on which to listen for connections (default is 1500). It must be between 1024 and 65535. The same restriction
       applies to port numbers specified by the --log-socket option to Valgrind itself.

       Please note that killing the listener doesn't actually kill the processes sending data to it.

OPTIONS

       -h --help
	   Show the help message.

       -e --exit-at-zero
	   Causes the listener to exit when the number of connections falls back to zero (the default is to keep listening forever).

SEE ALSO

       valgrind(1), $INSTALL/share/doc/valgrind/html/index.html or http://www.valgrind.org/docs/manual/index.html.

AUTHOR

       The Valgrind developers.

       This manual page was written by Cristian Greco <cristian@regolo.cc> and the Valgrind developers.

Release 3.7.0							    06/05/2012							       VALGRIND(1)
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