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367
votes
5answers
140k views

Anyone else experiencing high rates of Linux server crashes during a leap second day?

*NOTE: if your server still has issues due to confused kernels, and you can't reboot - the simplest solution proposed with gnu date installed on your system is: date -s now. This will reset the ...
15
votes
2answers
1k views

CRITICAL STRUCTURE CORRUPTION on Windows Server 2012 R2

I have a Windows Server 2012 R2 virtual machine; yes with all the updates. Additional software include Microsoft SQL Server 2014 (was 2012 on a previous VM). The web hosting company includes xenpci....
10
votes
4answers
5k views

How to use kdump/crash to investigate an OOM issue?

The problem A server crashed after multiple "Out of memory" messages and I am trying to pinpoint the culprit. If it is in userland - which process. If it is in the kernel - which kernel module. ...
8
votes
3answers
31k views

What is wrong in my php-fpm configuration?

I have a 64-bit server but only 256MB of RAM. So, I moved to nginx server with fast-cgi to connect to PHP. I have PHP 5.3.6 running. The issue is that after every two or three days when I try to ...
8
votes
1answer
414 views

Dell PowerEdge server crashed, how to repair? What happened? Information inside

I am currently in high school and run our school's website. This summer, our SysAdmin was diagnosed with cancer, and he went off for treatment, so I have been thrown into an interesting situation. I'...
8
votes
2answers
2k views

What can cause ALL services on a server to go down, yet still responding to ping? and how to figure out

It has happened to me already twice within very few days that my server goes down completely, meaning http, ssh, ftp, dns, smtp, basically ALL services stop responding, as if the server had been ...
5
votes
1answer
1k views

ESXi v5.5 is having random crashes

HW: Type: HP Proliant ML350 G5 RAM 22GB CPU 1 x Intel Xenon E5405 2.00GHz OP: ESXi 5.5 just updated from 5.1 to try and fix the crashes occurring on ESXi 5.1 on same hardware. I'm trying to find ...
5
votes
2answers
132 views

MCE Error Codes/Pink Screen - Should they be a cause for concern?

So I recently purchased a server grade system along with all server grade peripherals. I'm licensed for ESXi 6 and have all recent patches installed. System has been running around 2 weeks now and ...
5
votes
2answers
6k views

Why is Linux kdump not writing to /var/crash?

It's happened again! I have 4 servers which are crashing periodically, and there is no information printed to the system logs or the serial console. In addition, the Linux kdump service isn't writing ...
5
votes
1answer
2k views

Analyzing BSOD dump file from Windows 2008 R2 SP1

I have a problem with a virtual Windows Server 2008 R2 SP1 server running withing VMWare. The server is running Citrix and also has Symantec Endpoint protection installed. It randomly crashes and goes ...
4
votes
3answers
3k views

Can disk space be the reason for a server crash?

After looking into the MySQL error file, I found an error regarding disk space. Now I think its the reason for MySQL crashing: [root@xxxx ~]# cat /var/lib/mysql/xxxx.com.err 120528 17:45:05 [Note] ...
4
votes
2answers
544 views

MySql Data Loss - post mortem analysis - RackSpace Cloud Server

After a recent 'emergency migration' of a RS cloud server, the mysql databases on our server snapshot image proved to be days out of date from the backup date. And yet files that were uploaded ...
4
votes
3answers
6k views

APC XS 1300 Overloading every night at 2:45AM

Here is the situation that I have run into for the past 2 nights: I leave work and all is well, severs happily humming away everyone has access, life is good. I get in the morning, and the only ...
4
votes
2answers
199 views

Figuing out the “who, what, when and why” of a server crash

Currently, I'm the Moodle Admin for my University, and one of my responsibilities is to keep the server running and working all the time. Sometimes, for no apparent reason, Apache or / and MySQL ...
4
votes
1answer
292 views

Crash dump analysis

I hope this isn't a stupid question, and if it is, then I want to at least get it over with so I don't feel so dumb in the future. Here we are, loading up a Windows crash dump with Windbg. Here are ...
4
votes
1answer
1k views

Hyper-v on 2012R2 startup gen1 vm causes the host to freeze up

I've searched a lot to resolve the following issue, but nothing helped me. My problem is, that starting up a first-gen vm locks up the whole host. Only a hard reset helps. Second-gen vm starts and ...
4
votes
1answer
2k views

Apache httpd processes and PHP out of memory

I have a VPS running apache-php-mysql on centos and a single drupal website installed. The VPS has 256MB of RAM (could be the root cause of all my problems... maybe I just need more). Whenever I try ...
4
votes
2answers
3k views

How to stop a random ramp in FCGI Processes Killing the server

So got the below earlier to day... Around that time the logs show a ramp in processes(600) and associated memory (1.2g), cpu usage load average (80) untill the server gave out. Server had to be hard ...
4
votes
3answers
65 views

How do you force Windows to keep memory dumps?

I'm trying to debug a sporadic problem with some Dell tablets out in the field that crash intermittently. Looking at the Event Viewer logs, it seems that Windows automatically creates a memory dump ...
3
votes
3answers
6k views

Is a hardware watchdog already active at my CentOS server?

I rent a dedicated server (with Intel Haswell CPU and custom hardware) at a lowcost hosting service and use it with CentOS 6.4 / 64 bit Linux (with stock kernel: 2.6.32-358.14.1.el6.x86_64). Every ...
3
votes
2answers
589 views

Debian Linux server locked - no clues in the logs?

I had a server lock up this morning. Here is a screen shot from the console: None of the messages from the screen shot mean anything to me. I have a feeling that the important stuff probably ...
3
votes
2answers
1k views

memory&swap are full, can't ssh; any option other than physical restart?

by mistake, i executed some applications that used all memory (and i think swap) on my ubuntu server and its now crashed, SSH doesn't work and freezes. Do you know any other options other than ...
3
votes
1answer
404 views

Nonexistent service gets a start control?

I've got a pair of servers that both log an event "The cpuz135 service was successfully sent a start control." but cpu-z isn't installed on either machine. I can't find the service listed in Windows' ...
3
votes
5answers
747 views

Ubuntu 10.04 server crash

I'm running an Ubuntu 10.04 (x64) as a web/mysql server. The server became unresponsive to SSH, Ping, HTTP etc. and the technician with physical access to the machine sent me this screengrab here: ...
3
votes
2answers
176 views

Windows 2012 R2 server, crash, no dump file

I have a Windows 2012 R2 dedicated server. 64 GB RAM. Sitting in a remote datacenter. It crashes about 1-2 times a day. I have a KVM over the internet that I can view the screen. Screen says ...
3
votes
1answer
2k views

MySQL Periodically Crashing

MySQL Seems to be crashing quite often, I'd say every hour or so. The only thing running on this server that is using MySQL is a Drupal installation that I'm working on, there's only one person that'...
3
votes
3answers
3k views

Troubleshooting the dreaded 0x9C BSOD

We have a Dell PowerEdge 2950 running Windows Server 2003 R2, Enterprise x64 with Service Pack 2 installed. Recently, we've been experiencing multiple STOP errors occurring with that server. ...
2
votes
8answers
25k views

How to track down the cause of Windows Server 2008 crashing?

I have Windows Server 2008 running under VMware. Recently, its started to crash roughly every day, with continuous 100% CPU utilization, and no response in the GUI. Is there a step-by-step ...
2
votes
2answers
321 views

Hosting server's harddisk crashed [closed]

My hosting provider has told me that the server harddisk that I am currently using is crashed and they failed to recover most of the data and they only managed to recover some files or folder from the ...
2
votes
4answers
2k views

Windows Server 2008 R2 + MSSQL Server R2 crashes once a week, suggestions?

Can someone give me pointers where to look in order to debug why this fresh install of Windows Server 2008 R2 with an untweaked MS SQL-Server R2 which is serving just one ~5GB db to 2 clients crashes ...
2
votes
5answers
307 views

Server crashed - corporate web application is down - considering moving to an online host - any suggestions?

I'm in a mess here. For a couple of years we've been running our own custom made application on a local server in our office. The servers had its well bad days and good days now and then - however the ...
2
votes
4answers
7k views

Ubuntu 11.04 Server Crashing - failed command: READ FPDMA QUEUED

I have a new Ubuntu Server (11.04) that keeps crashing, especially during heavy disk I/O (like making a backup). It's drives are configures as a RAID 10 with 4 1TB Western Digital Caviar Black Hard ...
2
votes
1answer
11k views

PAM unable to dlopen(/lib64/security/pam_fprintd.so) causing CentOS/Redhat server to crash

CentOS 6, Parallels PLESK 10.4, Apache One of my servers went down over the weekend much to my dismay. On the day and time it occurred, my log errors/messages end with this - /var/log/secure: Jul ...
2
votes
3answers
497 views

memtest86+ crashing on server

We have a few DELL 1950 servers. One of those servers has CentOS6.3 and it's randomly rebooting, so I suspected it was hardware (no log generated). The other four servers do not randomly reboot. We ...
2
votes
5answers
7k views

How can I fix Purple Screen of Death for ESX 5.5?

I have a ESX 5.5 installed on my HP Proliant DL 180 G6 with a configuration of 8X Intel(R) Xeon(R) CPU E5540 @ 2.53GHz, 24 Gb RAM. Recently the server has crashed four times, showing the Purple ...
2
votes
1answer
89 views

Recovering MySQL Databases from Total Failure

MySQL was not starting. I backed up /var/lib/mysql/*. I uninstalled MySQL and reintalled it. It started again. I copied everything back to /var/lib/mysql. I restarted the service. I logged in and ...
2
votes
1answer
2k views

Kernel oops on Linux running in VirtualBox breaks some IO-related functionality on the server

We are having problems with CentOS release 6.3 running in VirtualBox on Windows 7 machines. The symptoms are the following: Everything works as normal for several hours, even days. Then something ...
2
votes
1answer
594 views

Windows Server 2003 Small Business Server (SBS) not generating crash dump on BSOD

I have a very frustrating issue. Our Windows Server running 2003 SBS SP2 is not generating crash dump files on a BSOD. I am currently troubleshooting an issue where a critical 3rd party service causes ...
2
votes
1answer
1k views

Windbg / minidump - how do I get a process list with memory use

I've used Windbg only for the most simple !analyze -v in the past. Now I've got a bit of a problem... Some process is running wild and consumes all available memory (I can see it spike in monitoring ...
2
votes
1answer
1k views

Analyzing crash dump file from Windows 2003 R2 SP2

My Windows 2003 R2 SP2 server crashes about once a month. I analyzed the crash dump but can't really figure out what it means. Any help is appreciated.... Microsoft (R) Windows Debugger Version 6....
2
votes
1answer
658 views

Server crash with ascii NUL characters in syslog ( ^@^@^@… )

I have some dedicated server hosted by a OVH (French service provider). OS : Ubuntu 12.04 x64 A few months ago, one of my server crashed. The only weird thing was some "ASCII NUL" caracters in the ...
2
votes
1answer
9k views

Server crashed, some MySQL databases are broken. Trying to recover with InnoDB recovery, but ibdata1 seems corrupt

I've a problem. Some days ago my root server crashes after a power outage. I realised that the MySQL server won't start. In the logs I find out that an error occured with InnoDB's ibdata1. I've ...
2
votes
1answer
2k views

Server hangs at “Shutting down loopback interface” on reboot

I'm having some trouble understanding what's going on with connecting one of our Xen hypervisors to our iSCSI SAN. Ever since we mounted our iSCSI targets, we've experienced hanging on reboots. This ...
2
votes
1answer
5k views

ESXI Crash need help to understand log and support about nexentastor on virtual machine

If i understand right, the following core dump means that the cpu4 has crashed the Host if i read the next line it seem that at the time the CPU 4 was assigned to the NexentaStore Vm ... SO if im ...
2
votes
1answer
308 views

Why might login failures cause SQL 2005 to dump and ditch?

Our SQL 2005 server began timing out and finally stopped responding on Oct 26th. The application logs showed a ton of 17883 events leading up to a reboot. After the reboot everything was fine but we ...
2
votes
0answers
40 views

Kernel Crash - kernel: BUG: unable to handle kernel paging request at 00000000ff8179b9

One of my Oracle Linux 6.5 Server running Oracle ASM/GRID experienced a kernel crash, it didn't respond i have performed a hard reboot. Server is Oracle Linux 6.5, kernel 2.6.39-400.214.3.el6uek....
2
votes
0answers
68 views

After Upgrading to Ubuntu 15.10 from 15.04, EC2 Webservers are Crashing

I have a variety of Ubuntu machines on EC2 running in production, with about 30 that were upgraded from 15.04 to 15.10. With most of the machines, the upgrade went flawlessly and experienced no issues ...
2
votes
0answers
90 views

Sudden failure of networking interface on CentOS 7

We're running a LAMP stack VPS on CentOS 7 hosting a few websites, MariaDB databases, and associated services. In the middle of the night our server mysteriously went completely offline. When we ...
2
votes
0answers
32 views

Perf crashing my RH

We are running perf on a 2.6.32-358.56.1.el6.x86_64 on an 8-core, dual socket machine. We have CPU iso on CPUs 1-31 (all except for 0), and our application is using CPUs 1-31. A few seconds into ...
2
votes
1answer
440 views

Ubuntu 12.04.2 LTS Server - Randomly hangs with no logging

My server randomly hangs and becomes unresponsive without any logging (dmesg, syslog, kern.log, boot.log, and messages). I cannot predict when it is going to happen. Sometimes the server runs fine for ...