I have upgraded 3 servers to Redhat 6.1 using the scratch install. The servers run fine for days/weeks until they are put under a load, then they hang to the point only cycling the power will reset the server. I have noticed the following: 1. The server seems to slow down slowly until it freezes/hangs. If networking is restarted the system seems to become more responsive. 2. A backup DNS Server ran fine until the apache web server was configured to run multiple domains. Then the server hung twice and 24 hours, since which time it has been up for 3 days and running. The previous web server has not crashed since either?!? Any ideas??
Sendmail will also stop or disappear without a trace over time.
Red Hat Linux 6.1 is not an officially supported release any longer. This problem sounds very likely to be hardware or kernel related. Since your bug report doesn't contain any hard info to go on however, it is very difficult to adequately determine a true cause of your problem. The best solution if you havent already is to upgrade to the latest release of Red Hat Linux, which is currently 7.2. Also, I see this bug is quite old and in "NEW" state. This is presumeably because it is misfiled against the redhat-release package which is pretty much only a few text files, config files, etc, and not related to the problem. A more appropriate choice for filing such bugs, and to ensure they are seen by someone and adequately diagnosed, is to file against the kernel package for system hangs, or the individual software package in the case of a sendmail or other package failure. If you continue to have such problems with the distro, please open a fresh bug report, against the relevant package, and include as much detail about your system, and the problem as you can, including any verbatim errors you see. Attach any relevant log files or other files to the new bug report using the file attachment link below the comment area.