I have problem with some servers. Sometimes server hangs up and in kernel log I couldn't find any kernel panic or others information about problem. Below could be found spec: OS: Debian 7.8 Kernel: 2.6.32-openvz-042stab105.6-amd64 CPU: Intel(R) Core(TM) i7-4770 CPU @ 3.40GHz I've checked and that it isn't connected with CPU, because I've observed similar problem on other CPU: Intel(R) Xeon(R) CPU E3-1246 v3 @ 3.50GHz What should I check ? I have zabbix monitoring on every problematic server and from graph it is ok for me (any cpu jumps, any ram jumps, etc) In kern.log sometimes could be observed: ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@ ^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^ @Mar 8 18:32:21 gs92 kernel: imklog 5.8.11, log source = /proc/kmsg started. I forgot mention that while server is not responding, ping works but other service (ssh, apache, mysql) don't
When server hangs up I cannot login via console also, please see attachment what is visible on screen: // because I haven't yet accessed to share with links, so please correct link below: http: //i.imgur.com/JDyGksq.jpg
Hi, I recommend to check if there is no problem with storage. please provide all the details how storage is provided for servers.
Disk controller: 00:1f.2 SATA controller: Intel Corporation C600/X79 series chipset 6-Port SATA AHCI Controller (rev 06) Disks organized as software RAID: # cat /proc/mdstat Personalities : [raid1] md2 : active raid1 sda2[0] sdc2[2] sdb2[1] 135282624 blocks [3/3] [UUU] md1 : active raid1 sda1[0] sdc1[2] sdb1[1] 20478912 blocks [3/3] [UUU] unused devices: <none> Usage: Filesystem Size Used Avail Use% Mounted on udev 10M 0 10M 0% /dev tmpfs 13G 644K 13G 1% /run /dev/md1 20G 1.8G 17G 10% / tmpfs 5.0M 0 5.0M 0% /run/lock tmpfs 26G 0 26G 0% /dev/shm /dev/md2 127G 90G 31G 75% /home Disks: === START OF INFORMATION SECTION === Device Model: INTEL SSDSC2BB160G4 Serial Number: PHWL44560301160MGN LU WWN Device Id: 5 5cd2e4 04c43c174 Firmware Version: D2010370 User Capacity: 160,041,885,696 bytes [160 GB] Sector Sizes: 512 bytes logical, 4096 bytes physical Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 8 ATA Standard is: ACS-2 revision 3 Local Time is: Thu Mar 19 21:45:47 2015 CET SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF INFORMATION SECTION === Device Model: INTEL SSDSC2BB160G4 Serial Number: PHWL4456039W160MGN LU WWN Device Id: 5 5cd2e4 04c43c1fe Firmware Version: D2010370 User Capacity: 160,041,885,696 bytes [160 GB] Sector Sizes: 512 bytes logical, 4096 bytes physical Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 8 ATA Standard is: ACS-2 revision 3 Local Time is: Thu Mar 19 21:45:50 2015 CET SMART support is: Available - device has SMART capability. SMART support is: Enabled === START OF INFORMATION SECTION === Device Model: INTEL SSDSC2BB160G4 Serial Number: PHWL44560391160MGN LU WWN Device Id: 5 5cd2e4 04c43c1e1 Firmware Version: D2010370 User Capacity: 160,041,885,696 bytes [160 GB] Sector Sizes: 512 bytes logical, 4096 bytes physical Device is: Not in smartctl database [for details use: -P showall] ATA Version is: 8 ATA Standard is: ACS-2 revision 3 Local Time is: Thu Mar 19 21:47:16 2015 CET SMART support is: Available - device has SMART capability. SMART support is: Enabled
so have you checked is it working fine? what is the load on disks? where containers are created? in /home? you have to investigate and find if there is a problem in server. if not then submit a bug report.
What should I have checked ? I have no idea. That problem is connected with many type of servers. Load of disk is it ok in the moment when server hangs up, please see graph: http: //oi59.tinypic.com/358t3k5.jpg vz containers is created on /home part: # ls -l /var/lib/vz lrwxrwxrwx 1 root root 8 Mar 26 09:28 /var/lib/vz -> /home/vz I've tried many methods and I can't find solutions on that problem