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Old 01-17-2013, 12:36 PM   #1
Registered: Feb 2011
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why there are 20000 connections on same port?


In the head node of our cluster there are almost 20000 connections open on the port number 7625.
And all these are in TIME_WAIT state.

And on the port http, there are almost 10000 connections open and even all these are in TIME_WAIT state.
Why is this happening?

And when i try to ping a web address i am getting
ping: sendmsg: Operation not permitted
Is this because of the above problem ? How do i solve this?

There is no packet loss or problem if i ping from other nodes on the cluster to any other nodes apart from the headnode. So clearly the problem is with the headnode. I tried restarting it still the same problem.

How do i solve this.

Thanks in advance
Old 01-24-2013, 06:11 PM   #2
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Registered: Dec 2005
Location: Brisbane, Australia
Distribution: Slackware64 14.0
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If you mean what is the TIME_WAIT state, there is a brief description here. If you want to know what processes are listening on those ports you can do this:
fuser -n tcp 7625
fuser -n tcp 80
netstat -tunape | egrep '7625|80'
The ping not being permitted could be due to a firewall or sysctl setting - are you familiar with checking those? For example:
sysctl net.ipv4.icmp_echo_ignore_all


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