Hardware Error Machine Check Events Logged Ubuntu
Contents |
communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed answers to any questions you might have Meta Discuss the workings and policies of this site About Us Learn more about
Hardware Error Machine Check Events Logged Redhat
Stack Overflow the company Business Learn more about hiring developers or posting ads with us hardware error machine check events logged centos Ask Ubuntu Questions Tags Users Badges Unanswered Ask Question _ Ask Ubuntu is a question and answer site for Ubuntu users and
Mca: Internal Parity Error
developers. Join them; it only takes a minute: Sign up Here's how it works: Anybody can ask a question Anybody can answer The best answers are voted up and rise to the top “mce: [Hardware Error]: mca: memory controller gen_channelunspecified_err Machine check events logged” appears in syslog. What should I do? up vote 7 down vote favorite 4 I have installed the latest version of OSSEC (2.8.1) and I have also enabled email notifications. And I am getting loads of these sorts of notifications saying that there is a Hardware Error and something about mce: OSSEC HIDS Notification. 2015 Apr 04 20:09:22 Received From: Bath-Towel->/var/log/syslog Rule: 1002 fired (level 2) -> "Unknown mcelog: failed to prefill dimm database from dmi data problem somewhere in the system." Portion of the log(s): Apr 4 20:09:21 Bath-Towel kernel: [ 1873.680872] mce: [Hardware Error]: Machine check events logged --END OF NOTIFICATION So what exactly does this mean? What does mce stand for? And is this apparent hardware error anything that I should worry about? OS Information: Description: Ubuntu 14.10 Release: 14.10 hardware error-handling share|improve this question edited Apr 11 '15 at 21:29 Eric Carvalho 28.1k1576105 asked Apr 4 '15 at 19:37 Paranoid Panda 13.8k2791205 You will need to do a bit of reading on ossec, see the rules - ossec-docs.readthedocs.org/en/latest/manual/rules-decoders . The web interface helps as it has a number of explanations - ossec.net/wiki/index.php/OSSECWUI:Install –bodhi.zazen Apr 4 '15 at 19:43 ossec-docs.readthedocs.org/en/latest/faq/… –bodhi.zazen Apr 4 '15 at 19:45 ossec is probably poorly supported or off topic here as it is not in the ubuntu repositories –bodhi.zazen Apr 4 '15 at 19:51 1 This is not about OSSEC at all. You got that notification because OSSEC found the word "error" in syslog. Although I don't think it is off-topic, you'll probably get more help form Unix & Linux or Server Fault. –Eric Carvalho Apr 4 '15 at 21:50 3 @bodhi.zazen All it has to do to be on-topic is run on Ubuntu. Now that doesn't
systemsStorageMicroHPC WorkstationsSoftwareeQUEUE – Our innovative web-based job submission tool.ACT Utils – Full featured cluster management software.Breakin – Open-source full featured hardware testing and diagnostics.ServicesACTnowHPC – On Demand HPC Cloud ComputingOur servicesRequest a quote
/var/log/mcelog
CloseTechIntel Xeon BroadwellKnights Landing - New Intel Xeon PhiGPU ComputingAMD hardware event. this is not a software error OpteronInfiniband CloseSupportSupport requestWarrantyKnowledge baseDownloadsCustomer portal CloseIndustriesEducationGovernmentEngineeringLife sciencesFinanceClimate and weatherEnergyManufacturing CloseBlog Close ACT knowledge base KB
Memory Scrubbing Error
CategoriesGetting Support (3)Hardware (1)Areca Raid Arrays (3)Infiniband (8)LSI Raid Arrays (7)Nvidia Graphics Cards (0)Power (1)Racks (2)Troubleshooting (8)Software (0)ACT Utilities (4)HPC apps & benchmarks (2)Linux (1)Schedulers (0)Open http://askubuntu.com/questions/605369/mce-hardware-error-machine-check-events-logged-appears-in-syslog-what-sho Grid Scheduler (Grid Engine) (1)TORQUE (1)Tech Tips (21)Search the KB Need Assistance?Support ticketName* First Last Company*Email* PhoneSerial numberPlease enter your system's serial number. This will expedite the handling of your ticket.Problem*Detailed description*Please make sure you are detailed as possible in your description above. Please include serial numbers, order numbers, or any other http://www.advancedclustering.com/act-kb/what-are-machine-check-exceptions-or-mce/ details that can help us resolve your issue as quick as possible.Attachments Drop files here or Include any screenshots or log files that will make your issue easier to diagnose.EmailThis field is for validation purposes and should be left unchanged. Submit a support ticketWhat are Machine Check Exceptions (or MCE)?Last update: August 18, 2014Categories:Hardware / TroubleshootingIf you are seeing messages in your system logs that state "Machine Check Event logged" this could be an indication of a hardware problem or failure.A machine check exception is an error detected by your system's processor. There are 2 major types of MCE errors, a notice or warning error, and a fatal exception. The warning will be logged by a "Machine Check Event logged" notice in your system logs, and can be later viewed via some Linux utilities. A fatal MCE will cause the machine to stop responding and the details of the MCE will be pr
September 14, 2015 04:36 Goal To know what the below error message means and how to troubleshoot it. xx xx xx:xx:xx xxxx kernel: [Hardware Error]: Machine check events logged - error logged on https://discuss.pivotal.io/hc/en-us/articles/206145257-DCA-V2-kernel-Hardware-Error-Machine-check-events-logged /var/log/messages Environment DCA V2Red Hat Enterprise Linux 6.xkernel-2.6.32-220.17.1.el6.x86_64mcelog-1.0pre3_20110718-0.7.el6.x86_64 Solution This message is harmless under the customer's hardware environment. The customer is monitoring /var/log/messages and the above message is subject to surveillance. But it is http://manpages.ubuntu.com/manpages/precise/man8/mcelog.8.html harmless message, so customer will ignore the above message and check /var/log/mcelog instead. The customer would like to know if the detail information is always recorded to /var/log/mcelog when the above message is logged hardware error in /var/log/messages. Troubleshooting /var/log/mcelog mcelog: failed to prefill DIMM database from DMI dataHardware event. This is not a software error.MCE 0CPU 0 BANK 12MISC 4937e01c086 ADDR 17a142ba40TIME 1431237188 Sun May 10 14:53:08 2015MCG status:MCi status:Corrected errorMCi_MISC register validMCi_ADDR register validThreshold based error status: greenMCA: Generic CACHE Level-2 Eviction ErrorSTATUS 8c2000400007017a MCGSTATUS 0MCGCAP 1000c14 APICID 0 SOCKETID 0CPUID Vendor Intel Family 6 Model 45 In the above case customer has hardware error machine used non-standard DIMMs in the cluster, which can be ignored as customer is aware of the issue. Resolution This is a harmless warning message. The DIMM database prefill relies on a specific nonstandard format of the DIMMs in the DMI BIOS tables. If this format is not used by the BIOS then mcelog will only discover DIMMs as they get their first error (if the CPU reports DIMMs in machine check errors). This applies to mcelog running on Intel servers mcelog has the (socketid, channel, DIMM) information from the CPU and tries to translate that into a motherboard silkscreen label using SMBIOS. The label is then logged in the log file and in the accounting database in memory. SMBIOS has no official way that works to do that translation, but on a Supermicro test system it was possible to do it by matching the non standard identifier. That is what mcelog is trying to do. Note Some reason where there are real problems1. DIMM failureBelow is an example of DIMM failure reported in mcelog Hardware event. This is not a software error.MCE 0not finished?CPU 7 BANK 5 TSC a4029f5662482RIP !INEXACT! 10:ffffffff812ea691MISC 20405ede86 ADDR 200ead3d80TIME 1431734326 Fri May 15 19:58:46 2015MCG status:RIPV MCIPMCi status:Error overflowUncor
mcelog --version DESCRIPTION X86 CPUs report errors detected by the CPU as machine check events (MCEs). These can be data corruption detected in the CPU caches, in main memory by an integrated memory controller, data transfer errors on the front side bus or CPU interconnect or other internal errors. Possible causes can be cosmic radiation, instable power supplies, cooling problems, broken hardware, or bad luck. Most errors can be corrected by the CPU by internal error correction mechanisms. Uncorrected errors cause machine check exceptions which may panic the machine. When a corrected error happens the x86 kernel writes a record describing the MCE into a internal ring buffer available through the /dev/mcelog device mcelog retrieves errors from /dev/mcelog, decodes them into a human readable format and prints them on the standard output or optionally into the system log. Optionally it can also take more options like keeping statistics or triggering shell scripts on specific events. The normal operating modi for mcelog are running as a regular cron job (traditional way, deprecated), running as a trigger directly executed by the kernel, or running as a daemon with the --daemon option. When an uncorrected machine check error happens that the kernel cannot recover from then it will usually panic the system. In this case when there was a warm reset after the panic mcelog should pick up the machine check errors after reboot. This is not possible after a cold reset. In addition mcelog can be used on the command line to decode the kernel output for a fatal machine check panic in text format using the --ascii option. This is typically used to decode the panic console output of a fatal machine check, if the system was power cycled or mcelog didn't run immediately after reboot. When the panic triggers a kdump kexec crash kernel the crash kernel boot up script should log the machine checks to disk, otherwise they might be lost