Almar Diehl 8 December 2010 08:56:40If your SMTP server is running Domino version 8.5.2 I strongly advice you to install Interim Fix 2 that was released by IBM last week. There is a nasty bug in the 8.5.2 SMTP task that will spike the server's CPU to 100% on certain messages. Below is the problem description from IBM. You can download IF2 from IBM Fix Central.
Users stop receiving mail and SMTP task on server shows 50-100% CPU utilization.
After upgrading to Lotus Domino 8.5.2, users stop receiving SMTP mail. Your Domino server CPU spikes on SMTP and may appear to be hung.
The "show tasks" command may show the following thread. You may see numerous SMTP threads or a single SMTP thread:
Server.Task = SMTP Server: Providing service for 123.45.678.910
Server.Task = SMTP Server: Providing service for 123.45.678.911
Server.Task = SMTP Server: Providing service for 123.45.678.912
nSMTP can spike the CPU anywhere from 50% to 100%.
This is caused by a specific SMTP message where we see 50-100% CPU, depending on the platform.
Restarting the Domino server may resolve the hung task temporarily, but it is possible that another message will get stuck and the CPU will spike and appear to be hung again.
- Comments