Solaris 10 health check for Network/ Weblogic

[Database Administrator]

Hi,

In Solaris 10, what stuff to check os level, when for few minutes, not
able to telnet the remote SMTP (port 25). After we bouncing the Java
(weblogic), its run fine.

ndd close_wait was set to 60000

There are 32000+ close_wait connection at the time it occurs,
plimit of java is 65535(no. of fd)


Thanks,
-Raxit

[Database Administrator]

"raxit@m4mum.com" writes:
> There are 32000+ close_wait connection at the time it occurs,
> plimit of java is 65535(no. of fd)

That's a huge number of close-wait connections. Something's wrong.

Generally, there are two things that can cause that sort of problem:

1. Application bug. Close-wait state means that the peer has closed
the connection (sent FIN), but the local application has not yet
closed its end of the socket. That can happen by accident if the
application forks and fails to close unwanted file descriptors in
the child.

2. OS bug. There've been some bugs that cause connections to be
stuck in close-wait.

Either way, I strongly suggest contacting Sun's support group.

--
James Carlson, Solaris Networking
Sun Microsystems / 35 Network Drive 71.232W Vox +1 781 442 2084
MS UBUR02-212 / Burlington MA 01803-2757 42.496N Fax +1 781 442 1677