Too many connections

HCL Domino Domino Forum
1

Running Domino 6.5.1 on Red Hat 8.0, and am having trouble with “Path to server not found” coming up on workstation. There is not a resolution issue, DOMINO works as a DNS or WINS query. The only thing I can see as a potential problem is the connections to the server. Here is an excerpt from netstat -an on the domino server:

tcp 0 0 192.168.1.100:1352 192.168.1.78:4490 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4233 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4231 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4229 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4483 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4481 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4255 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4767 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4510 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4508 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4506 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4249 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4760 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4504 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4247 ESTABLISHED

tcp 0 0 192.168.1.100:1352 192.168.1.78:4502 ESTABLISHED

Just for that one workstation (192.168.1.78), I am getting 187 established connections. ( netstat -an | grep 1.78 | wc -l — this reports 187). Here are some of the other machines:

192.168.1.87 - 52 connections

192.168.1.99 - 29 connections

192.168.1.97 - 11 connections

For less than 15 users of this domino server, it has averaged 317 connections for the past two days. I compare this to another installation I have with over 300 users hitting a server, and this is the response there: 398 connections averaged. That system is running Red Hat 8 likewise and both were installed by me using the same methodology.

Other notables about this machine: P4 2.4GHz, 1GB RAM, IDE boot disk with notes data installed on 10K rpm SCSI drive (have tried moving data to IDE with same luck). Load average is never high, and 2GB of swap is wasted as is not used.

2

Subject: Too many connections

Try to rule out other problems:Can you connect to port 1352 on the notes server from the workstation?

You can use nping for this, telnet hostname 1352 (on windows) should work too and otherwise just use a portscanner like nmap.

Does it work from any workstation? What is the worksstations OS (tcpip maximum connections)?

If I correctly understand you, there is already a connection established between 192.168.1.78 (workstation) and server on notes. What are these connections doing if you are not getting one?

Another possibility would be to use a firewall that pops up when a connection is required to monitor what TCP/IP is doing.