Questions tagged [troubleshooting]

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

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Error: No space left on device: (deleted)/dev/zero

**** Hoster something changed on hypervizor but said, that nothing was changed. The problem is not on the server anymore... **** Could someone help me to solve the following problem: If I want to ...
kbu's user avatar
  • 255
0 votes
1 answer
3k views

Office 365 In-Place Hold preventing me from deleting user

I am using AD Connect to synchronize my on-premises Active Directory to our Office 365 tenant. I tried disabling a user from on-premises and then synchronizing to O365. However, it seems to have ...
blizz's user avatar
  • 1,154
0 votes
0 answers
43 views

Investigating night time shut downs

I have a Windows Server 2008 R2 install (AMD FX-4100 quad core, 32gb) is shutting down around 2:30 am every other night. I've updated the motherboard BIOS but that hasn't helped. I ran AUTORUNS.EXE ...
amber's user avatar
  • 149
-1 votes
1 answer
115 views

Diagnose Sudden Slowness on Linux

I have two identical Linux laptops (Core™ i7-4810MQ with 32GB RAM) both running Ubuntu 16.04. Running seemingly any command on machine 2 takes about 4-12 times as long as on machine 1, depending on ...
chadsgilbert's user avatar
1 vote
1 answer
325 views

Periods of high packet loss, two ethernet cables plugged into TWC modem

A small business for which I am the system administrator has been experiencing intermittent internet dropouts. There seems to be no pattern to the dropouts — sometimes there is nothing for a week, and ...
user3476044's user avatar
1 vote
1 answer
2k views

Strange behavior from App-V virtualized application - can't start new instance until all others are closed

I first must apologize for the vagueness of this. It is rather hard to pin down, which is why I turn to posting this. The environment is Windows 2012 R2 Citrix 7.16 servers, multi-tenant (which is ...
Gomibushi's user avatar
  • 1,313
0 votes
1 answer
2k views

Updating a Zone File - Adding CNAME records - How to troubleshoot/where have I gone wrong?

I apologize in advance for this newbie question. I've resorted to asking because I can't seem to find enough closely-related queries* on this network or elsewhere, and the BIND 9.9 ARM is not exactly ...
Jack Atlantic's user avatar
0 votes
1 answer
647 views

SSRS Subscription fails, Server Response 4.4.1

I have an SSRS server that processes many subscriptions on a daily basis. I have just become aware of this, so I don't know if it is a new or an old problem, but only one subscription has been ...
JamesTheDev's user avatar
-1 votes
1 answer
225 views

How to diagnose end user DNS problems with my domain? [closed]

I work for a small part of a large organization that has been on the internet since dinosaur days (pre-CIDR). I'm confident our DNS is properly configured, but a tiny fraction (<1%) of our remote ...
Foo Bar's user avatar
  • 161
0 votes
1 answer
1k views

What to do with trailing slash in $HOME on CentOS?

I have a little project server sandbox running CentOS. Setting up a new server package, I realized I needed to add new directory to the path and I found $HOME has a trailing slash for the main user. ...
xtian's user avatar
  • 321
0 votes
1 answer
1k views

Cisco C220 M3 Doesn't Recognize HBA, SSD

I am attempting to set up a Cisco C220 M3 blade server for a company and have been running into issues with the hard driver controller(s) that the machine has. The intent is to have vmWare ESXi ...
Oren Cope's user avatar
0 votes
2 answers
2k views

Part of LAN network connected to 1 switch freezes up periodically

I'm managing an office network which is spread across 2 buildings. (see network setup below) In building 2, we are getting a problem where the network slows down and then completely cuts off. The ...
sam's user avatar
  • 173
3 votes
0 answers
2k views

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 ...
Jacob Evans's user avatar
  • 8,006
3 votes
1 answer
15k views

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 ...
theMarceloR's user avatar
0 votes
3 answers
214 views

How to investigate critical server load reported by nagios3? [closed]

Nagios3 running on my Ubuntu Server occasionally sends me email reports similar to: Notification Type: PROBLEM Service: Current Load Host: localhost Address: 127.0.0.1 State: CRITICAL Date/Time: ...
Sfisioza's user avatar
  • 592
-1 votes
2 answers
2k views

Cannot ping any Windows device on local network, but can ping *nix

Strange issue started yesterday: I cannot ping any Windows PC on my local network. I have (2) Windows 7 Pro devices, one of which was reimaged just before this issue started; (1) Windows 10 Education ...
redbiscuit's user avatar
1 vote
0 answers
279 views

Troubleshoot random Network disconnection (USB Modem)

In general how to debug random network disconnection issues? I am working on Intel Edison board which is connected to the internet via a Huawei E8231 USB Modem. Few devices loose the internet ...
Sandeep's user avatar
  • 111
0 votes
1 answer
148 views

Tomcat view connector settings being used

Is there a way to view what settings are set for a connector at runtime? For instance, I want to see what maxConnections is set to. Pretty much verify all these settings: https://tomcat.apache.org/...
Matt's user avatar
  • 175
1 vote
0 answers
296 views

What network setting could impact iperf3 results?

I am making some bandwidth tests to set a baseline for some other tests and I have a behaviour I cannot understand. The tests are done with iperf3 on Linux (with and without -R to get both up- and ...
WoJ's user avatar
  • 3,657
1 vote
0 answers
339 views

How to troubleshoot rx_tcp_udp_chksum_err

Recently our Nagios started reported network interface errors on few servers and I have no idea how to identify what caused these errors. I collected some information here and hope someone can ...
Ask and Learn's user avatar
1 vote
0 answers
427 views

Ubuntu 14.04 becomes unresponsive after 2-12 hours + of idle time

As the title says my Ubuntu 14.04 server becomes unresponsive after a period of being idle. It is going to be an NGNX proxy box, but not taking production traffic yet for obvious reasons. It ran for ...
Jeff Gebhardt - MSFT's user avatar
-1 votes
1 answer
594 views

OpenVpn troubleshooting

I run a VPN with Openvpn on a Debian 8 server. It works kinda well. Sometimes (once a month or every 3 weveks) the tunnel stops running and I have to reboot the server to be able to connect to the ...
avenetj's user avatar
0 votes
1 answer
231 views

Diagnosing why apache virtual host has stopped working

We have an Apache (IBM HTTP Server that is a fork of Apache: http://www-03.ibm.com/software/products/en/http-servers) server that runs virtual hosts that listen to port 80, 8000, and others (this for ...
StackOverflowed's user avatar
2 votes
2 answers
9k views

how to debug/troubleshoot collectd?

I have an issue with custom script using exec plugin. From shell the script works well and nothing useful in /var/log/collectd.log. LoadPlugin logfile <Plugin logfile> LogLevel info ...
Putnik's user avatar
  • 2,327
0 votes
2 answers
295 views

HP ML115 G5 shuts itself off a little while afrer pushing the power button

We have (quite an old, yeah) HP ML115 G5 AMD based server which shuts itself off 10-15s later (during fan test I suppose) after pushing the power button and before BIOS POST single beep appears. We ...
Michal Sokolowski's user avatar
2 votes
3 answers
916 views

Diagnosing system which persistently recognises SATA drives but refusing to recognise SAS drive or its replacement?

I've done a fair bit of troubleshooting but I'm completely at a loss what could be going on. Hardware / platform Supermicro X10SRi-F motherboard EVGA 850W G2 PSU (one of the highest rated for power ...
Stilez's user avatar
  • 724
8 votes
1 answer
456 views

DNS issues after KB3200970 and KB3202790 updates installed

I have notices the issues after I let run Windows it updates a week ago. O The issue is illustrated here. What's happening is that when I open a link (or a new tab, etc), it's very likely the first ...
Mr. Raspberry's user avatar
1 vote
1 answer
2k views

Looking for a workaround to install a personal certificate in a mandatory profile

I have recently set up mandatory profiles for a PC image I am creating and I have been able to set up everything I need in the profiles via group policy with the exception of one major item. ...
Jacob skidmore's user avatar
0 votes
1 answer
401 views

Apache Server CPU Spikes what will be the root cause?

We have a CMS Server which runs with apache Server. During night time around 7 to 11 PM the cpu spikes and after some time it comes down automatically. I tried different troubleshooting methods like ...
brtr's user avatar
  • 1
2 votes
2 answers
403 views

Testing VPN from same network I want to VPN into

This is a general question. I'm building a VPN for my work network on a Juniper SRX firewall, and I need to troubleshoot it. Right now, I have to walk to a cafe or library to test it and then go ...
Michael's user avatar
  • 23
5 votes
2 answers
6k views

debugging stuck apache/php thread on production server

I have a linux system with apache httpd and PHP which is loaded using LoadModule php5_module /usr/lib/apache2/modules/libphp5.so. I've enabled the mod_status module of apache and I see a particular ...
cherouvim's user avatar
  • 824
1 vote
2 answers
30k views

Why is Group Policy not applying a desktop wallpaper setting?

I am configuring Group Policy in Windows Server 2008 R2 Enterprise to apply Desktop Wallpaper to Users and Computer in OU called HR. I shared the folder over the network using share and storage ...
John Ambers's user avatar
1 vote
2 answers
732 views

Win2012r2 Services Recovery Tab documenation refuses to launch

Services Recovery Tab Help will not launch. [ On the "Recovery" tab in Windows Services.msc, clicking on "Help me set up recovery actions" results in "An internal error occurred (...
rjt's user avatar
  • 584
3 votes
2 answers
6k views

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 ...
Chris Ray's user avatar
0 votes
1 answer
610 views

Troubleshooting Apache virtualhost

Got some trouble using this configurations : <VirtualHost *:80> ServerAdmin ************** ServerName nagios.vdb.local ServerAlias nagios DocumentRoot /usr/local/nagios/share ...
Nicolas Frbezar's user avatar
0 votes
1 answer
132 views

VoIP NAT to connect to companies of the same ip address range together

I am currently using packet tracer to configure the network for Company A. I have configured DHCP and telephony service successfully but the problem I'm facing is when company A tries to contact ...
user3636442's user avatar
0 votes
1 answer
994 views

Cannot connect to internet after a power cut yesterday

I work at a small company, we have set up our LAN using an ASUS RT-N18U. We are in a small office as part of a business park, our network comes in over wire, as part of a package supplied by the ...
mal's user avatar
  • 137
0 votes
2 answers
2k views

Troubleshoot if /etc/init.d script would run on startup, without actually rebooting?

I have this script in /etc/init.d that I want to know if it will be run when the system reboots. Is there a way to "simulate" the conditions of a reboot to see if the script will actually be invoked (...
jotadepicas's user avatar
2 votes
1 answer
4k views

How to troubleshoot a web server?

NOTE: This is being asked, not because it is a good question (in my personal opinion, it's not), but because I've noticed a lot of questions on here boil down to this question, and since I'm sick of ...
Parthian Shot's user avatar
1 vote
0 answers
878 views

Sun X4150 not powering up via power button

What I have I have a Sun Server X4150 ( https://docs.oracle.com/cd/E19121-01/sf.x4150/820-1852-13/doradi-overview.html ) which I have set up in a research environment (I'm testing various OSs and RAID ...
Madivad's user avatar
  • 111
0 votes
1 answer
3k views

Couchdb service shuts down a second after start

I'm having problems getting the couchdb service running. When I start it, it only lives for a second or so before shutting itself down. Here's an example - first a status command showing it's inactive....
hallvors's user avatar
  • 103
0 votes
1 answer
298 views

Failure installing and running couchdb on Lubuntu

I'm trying to get started using CouchDB on a laptop where I recently installed Lubuntu (15.10). I'm having strange issues.. Yesterday, I installed CouchDB (sudo apt-get install couchdb) and it ran ...
hallvors's user avatar
  • 103
0 votes
1 answer
3k views

How to Handle Routes of Two Laravel Projects on One Domain or Server?

I'm working on a project divided into two separate parts. Part one, the bigger part, is in Laravel 4.2. Part two, the shorter part, is in Laravel 5. Both are on the same server. My goal is to access ...
Khuram's user avatar
  • 101
2 votes
2 answers
929 views

Website inaccessible until host is pinged from client (on a class A subnet)

There is this really weird issue on the internal network, this happens constantly to "random" machines. Machine (client) boots up, goes to some-intern-website-which-is-not-accessible-from-internet....
Gizmo's user avatar
  • 289
0 votes
1 answer
788 views

Server response not being received

I have a python program that sends requests via a socket connection to a local 3rd party application which in turn forwards my request to a server. The server response then makes it's way back to my ...
darkpool's user avatar
  • 169
3 votes
1 answer
4k views

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 ...
ajax1515's user avatar
  • 157
-1 votes
2 answers
2k views

Windows 7 (32-bit) Sysprep not running Unattend.XML but no error in logs

I am trying to Sysprep a Windows image that will run on identical hardware. The issue I'm facing is that the Unattend.XML file is somehow not running whatsoever, but the logs itself do not say ...
Josh's user avatar
  • 1
0 votes
1 answer
95 views

Port forwarding https request to other server.

I've been asked to fix a issue but I did not configure this server so I could not figure out what's happening here.. www.mywebsite.com connects to 20.20.20.20 (Webserver) www.mywebsite.com:...
ajsdg's user avatar
  • 161
5 votes
1 answer
5k views

Machine with bonded interface does not receive multicast packets on all slave interfaces

After an upgrade of our machines from RHEL 6.6 to RHEL 6.7 we observed a problem where 4 of our 30 machines only receive multicast traffic on one of their two slave interfaces. It is unclear if the ...
K Erlandsson's user avatar
0 votes
0 answers
306 views

Intermittent Network Instability

I have an office network being run by a Linksys WRT1900AC, and I'm experiencing significant, but intermittent issues. I have between 15 and 20 devices connected to it, including computers, phones, ...
mschultz's user avatar
  • 101

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