Datacenter problems on server SWISS

[Leecher]

One of our webhosting dedicated servers has stopped responding, we have contacted the datacenter and they are investigating why the server is not responding to reboots. We will keep you informed. THIS DOES NOT AFFECT ALL OUR CUSTOMERS.

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[NIS-Francisco]

We are going to have to schedule an emergency maintenance window for this server (swiss) for today.

Server is having kernel problems, that caused the server to go down:

Jan 11 04:58:22 swiss pure-ftpd: (?@88.7.48.179) [INFO] New connection from
88.7.48.179
Jan 11 04:58:22 swiss kernel: Unable to handle kernel paging request at virtual
address 08000000
Jan 11 04:58:22 swiss kernel: printing eip:
Jan 11 04:58:22 swiss kernel: c0140983
Jan 11 04:58:22 swiss kernel: *pde = 28ffb001
Jan 11 04:58:22 swiss kernel: Oops: 0000 [#1]
Jan 11 04:58:22 swiss kernel: SMP
Jan 11 04:58:22 swiss kernel: Modules linked in: ipt_owner loop md5 ipv6
ipt_TOS iptable_mangle ip_conntrack_ftp ip_conntrack_irc ipt_REJECT ipt_LOG
ipt_limit iptable_filter ip$
Jan 11 04:58:22 swiss kernel: CPU: 0
Jan 11 04:58:22 swiss kernel: EIP: 0060:[] Not tainted
VLI
Jan 11 04:58:22 swiss kernel: EFLAGS: 00010097 (2.6.9-42.0.3.ELsmp)
Jan 11 04:58:22 swiss kernel: EIP is at find_get_pages+0x30/0x50
Jan 11 04:58:22 swiss kernel: eax: 4002012c ebx: 00000002 ecx: 00000001
edx: 08000000
Jan 11 04:58:22 swiss kernel: esi: 0000000e edi: cf477a48 ebp: f7cffe90
esp: f7cffe58
Jan 11 04:58:22 swiss kernel: ds: 007b es: 007b ss: 0068
Jan 11 04:58:22 swiss kernel: Process kswapd0 (pid: 53, threadinfo=f7cff000
task=f7d2b7b0)
Jan 11 04:58:22 swiss kernel: Stack: 00000000 f7cffe88 00000000 00000000
c01490dc f7cffe90 cf477998 00000000
Jan 11 04:58:22 swiss kernel: c0149515 0000000e ffffffff cf477a48
00000000 00000000 c17a6340 08000000
Jan 11 04:58:22 swiss kernel: c1358bc0 c1451be0 c159f320 c12df480
c10fee00 f7cff000 c032a380 00000021
Jan 11 04:58:22 swiss kernel: Call Trace:
Jan 11 04:58:22 swiss kernel: [] pagevec_lookup+0x17/0x1d
Jan 11 04:58:22 swiss kernel: []
invalidate_mapping_pages+0xb3/0xc6
Jan 11 04:58:22 swiss kernel: []
remove_inode_buffers+0x10/0x5f
Jan 11 04:58:22 swiss kernel: [] prune_icache+0xf0/0x1ec
Jan 11 04:58:22 swiss kernel: []
shrink_icache_memory+0x14/0x2b
Jan 11 04:58:22 swiss kernel: [] shrink_slab+0xf8/0x161
Jan 11 04:58:22 swiss kernel: [] balance_pgdat+0x1e1/0x30e
Jan 11 04:58:22 swiss kernel: [] schedule+0x86d/0x8db
Jan 11 04:58:22 swiss kernel: [] prepare_to_wait+0x12/0x4c
Jan 11 04:58:22 swiss kernel: [] kswapd+0xca/0xcc
Jan 11 04:58:22 swiss kernel: []
autoremove_wake_function+0x0/0x2d
Jan 11 04:58:22 swiss kernel: [] ret_from_fork+0x6/0x14
Jan 11 04:58:22 swiss kernel: []
autoremove_wake_function+0x0/0x2d
Jan 11 04:58:22 swiss kernel: [] kswapd+0x0/0xcc
Jan 11 04:58:22 swiss kernel: [] kernel_thread_helper+0x5/0xb
Jan 11 04:58:22 swiss kernel: Code: 40 10 56 89 d6 53 8b 6c 24 14 89 cb e8 be
2a 19 00 53 89 f1 8d 47 04 89 ea e8 9d 09 08 00 5e 89 c3 31 c9 39 d9 73 15 8b
54 8d 00 <8b> 02 f6 $
Jan 11 04:58:22 swiss kernel: <0>Fatal exception: panic in 5 seconds
Jan 11 04:58:22 swiss pure-ftpd: (?@88.7.48.179) [WARNING] Authentication
failed for user []
Jan 11 04:58:26 swiss pure-ftpd: (?@88.7.48.179) [INFO] Logout.
Jan 11 12:12:45 swiss syslogd 1.4.1: restart.
Jan 11 12:12:45 swiss syslog: syslogd startup succeeded
Jan 11 12:12:45 swiss kernel: klogd 1.4.1, log source = /proc/kmsg started.
Jan 11 12:12:45 swiss kernel: Linux version 2.6.9-42.0.3.ELsmp
(buildsvn@build-i386) (gcc version 3.4.6 20060404 (Red Hat 3.4.6-3)) #1 SMP Fri
Oct 6 06:21:39 CDT 2006
Jan 11 12:12:45 swiss kernel: BIOS-provided physical RAM map:

We replaced the NETWORK Card, but after checking the server logs, we found that the kernel was also at fault.

We need to do some hardware testing to ensure everything is running as it should (especially server memory), and upgrade/fix the kernel accordingly.

Thank you for your patience, we will keep you updated.

[NIS-Francisco]

It has been 24 hours since we replaced the memory, the server has been stable.

We can close the maintenance window now and expect no problems on this soon.