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In my environment on our production server is frequently rebooting.It is an Oracle application server.
Red Hat Enterprise Linux Server release 5.8 (Tikanga)
64 Bit Machine
Please help me out on this issue. What are the first thing need to check?
Originally Posted by HariharanV
Please any one help me out on this...............
First, do NOT bump your own threads, especially not after just 2 hours. All you've succeeded in doing is removing your thread from the zero reply list, MAKING IT LESS VISIBLE. Second, we VOLUNTEER our time here, and don't just wait for you to post something...if you're in a hurry, then CALL RED HAT SUPPORT, since you're PAYING FOR IT, right???. They're there for you 24/7, since you're using RHEL.
If you're the administrator of a server, you should already know to check the log files for your services, the system logs, and dmesg, to see what events are occurring. You should also check the sudoers logs, to see if someone is shutting down the system. Have you run any Oracle traces? Called Oracle and/or Red Hat support? You've been registered here for three years now...with three years of experience, shouldn't you be able to do the basics by now?
I would start by checking the power supply. Is the AC line stable? Maybe the machine simply receives temporary power outages (spikes) causing the server to shutdown and restart when the power returns (this is a BIOS set up in modern machines). If the server were connected to an UPS, it would have the double advantage to protect from these transient outages and (if a data connection is available) to keep a log of every issue. Just my
Thank u colucix,
Actually that machine is running on vm it is virtual machine. I have seen the following line in my /var/log/message
kdump: failed to save a vmcore to /var/crash/2013-03-29-07:52
shutdown: shutting down for system reboot
Ok, so again...this is a Red Hat ENTERPRISE server, running Oracle. Have you contacted Red Hat and/or Oracle support yet?? Since you have ruled out a physical server issue, then it's a software issue. Have you tried checking the Oracle logs? ANY of the other things I mentioned previously? And since this is a VMware system, what version of VMware are you running, and have you contacted VMware support?? You're using three commercial products, all of which provide support when you buy them.