Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [troubleshooting]

Troubleshooting is a form of problem solving, often applied to repair failed products or processes.

It is a logical, systematic search for the source of a problem so that it can be solved, and so the product or process can be made operational again. Troubleshooting is needed to develop and maintain complex systems where the symptoms of a problem can have many possible causes.

357 questions
4
votes
1 answer

Troubleshooting Windows Server 2012 storage spaces

I'm trying the new "Storage Pools" feature on Windows Server 2012, and I've created several disks on the pool. When I restart the server, some of the disks (two, out of four) do not attach automatically, and don't show up in the list of disks. I can…
Iravanchi
  • 330
  • 4
  • 11
4
votes
0 answers

Monit will not start my node js app

I have a problem with Monit that I use for monitoring of my Node.js app. I just moved from a single core machine to a multi core one. On both of them I run Ubuntu 11.10. On the old one this was working. This script below uses a upstart script that I…
Buzz
  • 41
  • 1
4
votes
2 answers

Cannot mount /dev/sdc1 on Debian 5.0, special device /dev/sdc1 doesn't exist

I'm trying to fix an odd problem I'm having that I've never seen or heard of before. I have a disk, /dev/sdc and I'm trying to mount it, but cannot. sudo mount /dev/sdc1 /mnt mount: you must specify the filesystem type Ok, I remember it was…
Jeff Welling
  • 422
  • 1
  • 4
  • 11
4
votes
7 answers

General tips for interpreting error logs

Reading log files can be pretty frustrating as, by nature, their content says as much about the developer who penned them as the problem itself. Do you have any general purpose tips for interpreting error logs (eg: "google is your friend" or "some…
username
  • 4,755
  • 19
  • 55
  • 78
3
votes
1 answer

Troubleshoot random server freezes without log entries

We are experiencing a very particular and unique problem on our C# application which is running under .NET framework 4.7.2, in kiosk mode on Windows 10 Operating System that runs on a Lenovo ThinkStation P320 Tiny as Hardware (the same problem was…
systempuntoout
  • 2,055
  • 2
  • 13
  • 10
3
votes
0 answers

How can I test network connectivity to a Keberos KDC (UDP/88)

How can I test network connectivity to a Keberos KDC (UDP/88)? Does Kerberos have a standard way to communicate that gives any output? HTTP for example, nc -v google.com 80 GET will dump the website nc -v smtp.gmail.com 587 ehlo…
Jacob Evans
  • 7,886
  • 3
  • 29
  • 57
3
votes
1 answer

How to troubleshoot Nginx 499 when it's not returning a web sockets handshake back to the client?

In a Kubernetes cluster, I have an Nginx server acting like a reverse proxy / TLS termination solution that proxypass requests to a backend Tomcat application that has some functionalities powered by Web Sockets (SockJS / Stomp). Unfortunately, the…
theMarceloR
  • 159
  • 1
  • 1
  • 7
3
votes
2 answers

HTTPS slow/times out while HTTP is working normally

tl:dr: http traffic works reliably and quick while https traffic is unreliable or extremely slow (2-5 minute load times). Details below. Hey server fault, I have a good one for you. This is the beginning of week two at a new place that just expanded…
Chris Ray
  • 41
  • 1
  • 3
3
votes
7 answers

Wireless network signal strength troubleshooting... where to start?

Here is the information displayed by the wireless router (see end of post). The problem is that my netbook does not get any signals from the router if moved more than 3 feet (yup, three feet) away from the router. Please outline steps that I should…
Salman A
  • 492
  • 2
  • 9
  • 17
3
votes
1 answer

Find source of sleeping mysql connections

We have a very large number of PHP scripts running on our server that do a variety of things. Lately I've noticed that when looking in PHPMyAdmin there are a large number of connections to our MySQL server just lingering. Normally we're very good…
ajax1515
  • 57
  • 2
  • 9
3
votes
3 answers

Windows Search Indexer Uses High CPU Usage

We have a Windows Server 2012. From time to time the Windows Indexer has too high CPU usage. What could cause this and how could it be solved. It runs perfect several weeks and then it takes too much CPU load. What is the easiest approach to solve…
Matthias
  • 33
  • 1
  • 1
  • 8
3
votes
1 answer

Virtual Server HDD shrinks without apparent reason

We have a virtual hosted Linux server, and in the last few months every now and then the HDD shrinks from 400GB down to the exact byte count that is in use. All existing data can be downloaded and displayed without a problem, but we can't upload or…
Christian
  • 209
  • 1
  • 3
  • 9
3
votes
1 answer

iptables FORWARD port to internal server

I've been struggling with a FORWARD policy that isn't working the way I'd like, and I can't figure out what is causing the session to fail. I hope someone can help. My goal is to forward port 3000 from eth0 to an internal Windows machine port 3389…
Jonathan Almquist
  • 33
  • 1
  • 4
3
votes
3 answers

huge slowdown in network of 40 nodes when local DNS is up

We have a LAN with ~40 workstations (mostly Windows) and a couple of servers. All of them use an internal DNS (196.168.0.4 running BIND 9.5.0-P2) and a gateway (192.168.0.1 running OpenBSD Packet Filter) which is a local PC acting as router. For the…
cherouvim
  • 794
  • 3
  • 21
  • 37
3
votes
1 answer

Odd one-way ping issue that I can't wrap my head around

Long time lurker, but today I encountered an odd problem that will bug me until resolution :-) It seems to be presenting as a one-way ping issue from one server to a failover cluster. All machines are running Windows Server 2008 R2 with IPV6…
WinAdmin
  • 51
  • 1
  • 3
1 2 3
…
23 24