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Old 03-29-2013, 12:09 PM   #1
HariharanV
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Production server is frequently rebooting.


Hi All,
In my environment on our production server is frequently rebooting.It is an Oracle application server.

Release:
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?

Regards,
Hariharan V.
 
Old 03-29-2013, 02:14 PM   #2
HariharanV
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Unhappy

Please any one help me out on this...............
 
Old 03-29-2013, 03:09 PM   #3
TB0ne
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Quote:
Originally Posted by HariharanV View Post
Hi All,
In my environment on our production server is frequently rebooting.It is an Oracle application server.

Release:
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?
...and...
Quote:
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?
 
Old 03-29-2013, 03:25 PM   #4
HariharanV
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Hi TB0ne,

I have checked the logs, i couldn't see any unusual message. I have set the kdump but it is not generated.
 
Old 03-29-2013, 03:41 PM   #5
colucix
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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
 
Old 03-29-2013, 04:07 PM   #6
HariharanV
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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[4393]: shutting down for system reboot


Kernel command line: ro root=/dev/VolGroup00/lv_root rhgb quiet irqpoll maxcpus=1 reset_devices hdc=cdrom memmap=exactmap memmap=574K@64K memmap=6140K@16384K

memmap=124342K@23098K elfcorehdr=147440K memmap=2K$638K memmap=60K#3144640K memmap=4K#3144700K memmap=262144K$3670016K memmap=64K$4173824K memmap=4K$4175872K

memmap=128K$4194176K
Misrouted IRQ fixup and polling support enabled
This may significantly impact system performance
ide_setup: hdc=cdrom
Initializing CPU#0
PID hash table entries: 512 (order: 9, 4096 bytes)
Using TSC for driving interrupts
Console: colour VGA+ 80x25
Dentry cache hash table entries: 16384 (order: 5, 131072 bytes)
Inode-cache hash table entries: 8192 (order: 4, 65536 bytes)
Checking aperture...
ACPI: DMAR not present
Memory: 113900k/147440k available (2616k kernel code, 17152k reserved, 1672k data, 224k init)
Calibrating delay loop (skipped) preset value.. 4793.72 BogoMIPS (lpj=2396863)
Security Framework v1.0.0 initialized
SELinux: Initializing.
selinux_register_security: Registering secondary module capability
Capability LSM initialized as secondary
Mount-cache hash table entries: 256
kernel:NET:Registeredprotocolfamily2
kernel:IProutecachehashtableentries:1024(order:1,8192bytes)
kernel:TCPestablishedhashtableentries:4096(order:4,65536bytes)
kernel:TCPbindhashtableentries:2048(order:3,32768bytes)
kernel:TCP:Hashtablesconfigured(established4096bind2048)
kernel:TCPrenoregistered
kernel:SimpleBootFlagat0x36setto0x80
kernel:audit:initializingnetlinksocket(disabled)
kernel:type=2000audit(1364557920.716:1):initialized
kernel:TotalHugeTLBmemoryallocated,0
kernel:VFS:Diskquotasdquot_6.5.1
kernel:Dquot-cachehashtableentries:512(order0,4096bytes)
kernel:InitializingCryptographicAPI
kernel:alg:Notestforcrc32c(crc32c-generic)
kernel:ksign:Installingpublickeydata
kernel:Loadingkeyring
kernel:-Addedpublickey2D3142B3E704051
kernel:-UserID:RedHat,Inc.(KernelModuleGPGkey)
kernel:brd:moduleloaded
kernel:UniformMulti-PlatformE-IDEdriverRevision:7.00alpha2
kernel:ide:Assuming33MHzsystembusspeedforPIOmodes;overridewithidebus=xx
kernel:PIIX4:IDEcontrolleratPCIslot0000:00:07.1
kernel:PIIX4:chipsetrevision1
kernel:PIIX4:not100%nativemode:willprobeirqslater
kernel:ide0:BM-DMAat0x10c0-0x10c7,BIOSsettings:hda:pio,hdb:pio
kernel:ide1:BM-DMAat0x10c8-0x10cf,BIOSsettings:hdc:DMA,hdd:pio

Last edited by colucix; 03-29-2013 at 05:14 PM. Reason: Disabled smiles in text.
 
Old 03-30-2013, 09:33 AM   #7
TB0ne
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Quote:
Originally Posted by HariharanV View Post
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[4393]: 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.
 
  


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