Finding problems in a program and trying to solve these.

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2
votes
1answer
1k views

Failure to obtain IP with ARP over Wi-Fi with personal Wi-Fi router in client mode

I'm trying to connect a Samsung TV to the Internet using a TL-MR3020 personal wireless router in client mode. The TV fails to connect to the network. It sees the ethernet cable connected though. ...
3
votes
1answer
618 views

SQL Server Debugging: “Unable to Step. Invalid operation”

I'm debugging a call to a Stored Procedure in SSMS (2012). Frequently, and various random points in the code, a dialog pops up: Microsoft SQL Server Management Studio: Unable to Step. Invalid ...
1
vote
2answers
658 views

Diagnose hard lockup on Linux

During past month one of my Debian Squeeze (Linux 2.6.32-bpo.5-amd64) machines did lock up twice, hard. No response to ARP, dark console, Caps Lock, Num Lock not working, Magic SysRq ineffective. ...
0
votes
1answer
2k views

IP Camera working on lan but not on internet

My IP cam model is Genius 350TR, I tested the cam at home on lan and internet and it worked. Then I shifted it to an office. It works on the office lan setup but I cannot connect to the ip cam from ...
2
votes
3answers
2k views

Failed Request Tracing XML fails to display in Internet Explorer (IIS 7.5)

I have installed the Tracing feature and enabled failed request tracing for a website, to debug a Classic ASP website. The XML logs are created upon occurring errors, however when I open them in IE, ...
1
vote
1answer
253 views

Node app crashes after a while on micro EC2 instance even with supervisor

I'm using supervisor to start my node.js application on a micro EC2 instance. However, the app only stays running for some time until it eventually shuts down. Not exactly sure how long the app stays ...
1
vote
2answers
831 views

Amazon EC2 instance - issuing “top” command just goes blank on the ssh terminal

I have created an Amazon EC2 micro instance, running Amazon AMI. I logged into the server using ssh client. Once it logs in successfully, if I issue the "top" command, the top output never shows up ...
2
votes
2answers
255 views

sshd immediately core dumps after fsck repair

I have a centos server that recently needed a fsck repair on it's main hard drive. After fixing a bunch of inode issues (booting from a system rescue disk), the box booted clean. Most of the ...
3
votes
1answer
2k views

How to trace Apache 301 Moved Permanently?

I have one virtual host on my machine, which I am accessing localy. I am running apache2 under windows 7. When accessing this host, I see in Fiddler, that server redirects browser to different remote ...
4
votes
4answers
8k views

How can I investigate sustained high CPU usage by Microsoft.Exchange.Rpc.ClientAccess.Service.exe?

One CAS server in our array has nearly 90% of its 4 CPUs used. The remaining CAS servers are at 30 percent. How should I investigate what is causing this increase? Below is a graph of: Six ...
2
votes
0answers
290 views

A tool to measure overhead of establishing TCP connections

I need a tool which would while doing port forwarding measure how much time was spent establishing TCP connections vs total time passed. Charles debugging proxy has the port forwarding feature and ...
1
vote
1answer
63 views

Should I Install Windows 2003 Server Debugging Symbols in a Production Environment?

I have a software vendor that has requested that we install the Windows debugging symbols and the desktop heap monitor in our production environment. The vendor is trying to determine if we are ...
1
vote
0answers
337 views

GRE debug: “adding 0 encap bytes”?

What this debug message actually means? Shouldn't encapsulation add 24 extra bytes or not? For what reason encapsulation is not adding bytes to original packet in this debug message? Dec 28 ...
1
vote
2answers
697 views

Command that will take a 'system snapshot' of a linux system for later diagnosis?

I am running a Ubuntu Linux server with Apache, wsgi, django and mysql on it. Recently something happened and the wsgi processes frooze up. Restarting apache solved the problem. As with many live ...
0
votes
2answers
251 views

how do I troubleshoot rdp

I have one Windows XP SP3 pc on the domain that I cannot rdp into. The xp pc is enabled for rdp sessions. Port 3389 is open in the firewall. There are no errors in the event logs. I have tried to rdp ...
3
votes
1answer
1k views

Why can't openSSL verify google's certificate?

When I run the command openssl -connect www.google.com:443 from a Debian VM, I get the following within the output: Verify return code: 20 (unable to get local issuer certificate) What's going ...
1
vote
0answers
342 views

ColdFusion server won't to start

I'm trying to debug coldfusion application in Adobe Coldfusion builder 2.0 and I coldfusion server won't start. Here is log of console: [localServer]:Listening for transport dt_socket at address: ...
0
votes
1answer
231 views

Coldfusion crashing when I initiate debugging session?

I've been trying to hook up eclipse to RDS for a CF8 testing server I have in my office. Every time I try to test the connection, the CF8 application server service crashes. When I check the event ...
0
votes
1answer
879 views

I would like to redirect port 8140 on my public IP address (ip1) to port 8140 on Internet host (ip2)

edit3: i would like to get exactly what is descripted in http://shorewall.net/FAQ.htm#faq1g but it doesn't work for me. edit3 end; os: debian squeeze shorwall: 4.4.11.6-3 3 computers a, b & c; ...
4
votes
2answers
7k views

How to debug “HTTP request sent, awaiting response”?

I have a Linux server on an ADSL connection, and I just noticed that sometimes I get Connecting to example.com|xxx.xxx.xxx.122|:80... connected. HTTP request sent, awaiting response... when I use ...
4
votes
3answers
4k views

How can I find out where a file is physically located on the disk (block numbers)?

This is an obscure question, I know. I'm trying to do some performance testing of some disks on a Linux box. I'm getting some inconsistent results, running the same test on the same disk. I know ...
3
votes
2answers
52 views

debugger in bash

I use sh -xv my_script.sh to debug the /bin/sh script. How do I debug /bin/bash scripts? I am getting the following error and I need to know the line that needs to edit. # ./batch_master.sh ...
1
vote
1answer
73 views

Tools to help identify unknown server issue

We've been struggling to identify a issue where all our bespoke systems crash at least once a day. We haven't changed all our systems to we're trying to pin down what else has changed which is ...
1
vote
2answers
6k views

Unable to start Apache2 service on Solaris 10

This is a default installation of Solaris 10 x86. No tweaks or customization. 1) I first enable apache2. bash-3.00# svcadm enable apache2 2) Restart apache2 bash-3.00# svcadm restart apache2 3) ...
8
votes
3answers
1k views

Performing root-cause analysis

I want to learn more about how to perform root-cause analysis. More times than not, our department tells the user to try rebooting (thier Windows XP system), which actually "fixes" a good number of ...
4
votes
3answers
467 views

Send bash -x output to logfile without interupting standard output

Is there a way to send the information displayed by running a bash script with the -x option to a file, while not changing the standard output seen by a user running the script? This is a debugging ...
1
vote
1answer
54 views

Apache/PHP Configuration question - Where else can info.php be disabled besides php.ini?

Sorry for the bone head Q. but I rarely need to reinstall my server :) I wish to enable phpinfo() function. My php.ini config file has the disable_functions directive blank--which I understand is the ...
0
votes
1answer
2k views

Should I expect ICMP transit traffic to show up when using debug ip packet with a mask on a Cisco IOS router?

So I am trying to trace an ICMP conversation between 192.168.100.230/32 an EZVPN interface (Virtual-Access 3) and 192.168.100.20 on BVI4. # sh ip access-lists 199 10 permit icmp 192.168.100.0 ...
1
vote
2answers
1k views

Debugging perceived network saturation

I'm having a network issue where one machine is saying it is sending data at a rate of 150 Mbit/s but the other machine is receiving at a mere 100 Mbit/s. The sending application eventually crashes, ...
1
vote
1answer
403 views

Can only debug once

I can only debug a query once, after that I get this error and have to restart Management Studio. Unable to start T-SQL Debugging. Could not connect to computer '(local)'. The requested name is ...
2
votes
2answers
849 views

How to intercept socket traffic on solaris?

I'm not very familiar with Solaris, so maybe there are tools that I don't know about. I need to debug the communication between two components on the same machine, talking to each other using a normal ...
0
votes
1answer
160 views

How do I find out what's causing an access denied error?

I am getting an access denied error when I try to run a vbs script that uses WMI to do some stuff to IIS on Windows 7. Is there some sort of tool that can tell me what's causing the access denied?
3
votes
2answers
7k views

All connections from this network get stuck in SYN_RECV state, connections from my home or phone properly get ESTABLISHED

My server (a linode VPS) suddenly started to timeout on every request yesterday. I'm pretty inexperienced in networking and would love to learn a process for debugging these connectivity issues. ...
1
vote
1answer
508 views

Debug tips for intermittent slow responses from Confluence

I've started seeing a situation on our internal Atlassian Confluence instance where we get snappy performance most of the time, but a couple of times an hour requests (both read and write operations) ...
1
vote
1answer
251 views

DHeapmon not reporting expected number of total desktops in IIS6

Hope someone can help me make sense of this. I'm trying to debug some COM+ errors we see in our production environment and a few of them report that the desktop heap is exhausted, so I installed ...
0
votes
1answer
340 views

Dummy HTTP Post server

Where can I download a simple Windows GUI app that can consume an HTTP POST, display its contents, and return 200?
0
votes
1answer
170 views

Where do I find the Java command line tool “Gdb”?

Where do I find the Java command line tool "Gdb" ? It's not included in my Sun JDK 1.6 distribution. I need a way to take a java core dump from a live java instance.
0
votes
2answers
919 views

Debug Nexenta/OpenSolaris core files?

I have a Sun x4540 that was recently converted to NexentaStor Enterprise Edition from an earlier OpenSolaris. The system disks were wiped and the zpools were exported and reimported. I'm hosting ...
1
vote
1answer
371 views

How do I troubleshoot network connectivity problems in windows?

I'd really like to understand how to debug my network connectivity issues, but everything I find on the internet is either for basic users on "How to add a wireless network" or it's people talking ...
0
votes
1answer
306 views

Simple MySQL query locking up until database restart

I have a very simple query that runs in 216ms on my development machine but was taking more than 45 seconds on my production server, that is, until I restarted MySQL there: UPDATE `forum_categories` ...
0
votes
3answers
241 views

How to debug website that isn't loading

So I've got a website up and running with nginx/php-fpm/ubuntu It works really well (and fast) and uses hardly any memory. My client started an ad campaign yesterday, and there were a couple times ...
4
votes
2answers
4k views

How to enable debug of dhcp client on Windows 7

Is it possible to enable some sort of debugging for dhcp client on Windows 7?
1
vote
3answers
855 views

How do I find the query parameters for a prepared statement in an oracle .trc file?

I have an oracle query generating a 3137 error, and the trace file contains the query. For example: select x from y where z = :1 I think it would help to isolate the problem if I could determine ...
1
vote
1answer
832 views

How to get more information from the system crash

I'd like to debug an issue I'm having with a linux (debian stable) server, but I'm running out of ideas of how to confirm any diagnosis. Some background: The servers are running DL160 class with ...
0
votes
2answers
246 views

Where to get the source tar of zend debugger for PHP 5.3.x for linux?

I went here,but the web debugger only contains the windows version zenddebugger.dll, where to get the source tar of zend debugger or better the zenddebugger.so for linux?
2
votes
0answers
639 views

How to configure PHPStorm to debug on IIS

I installed PHP 5 on IIS on a Windows 7 64 bit machine using the Web Platform Installer. I am using PHPStorm as my PHP IDE but cant find any documentation on how to get debugging to work. PHPStorm ...
14
votes
8answers
9k views

How to setup a fake SMTP server to catch all mails?

I'm looking for an smtp service that essentially obeys the RFC, except rather than sending mail it simply logs to a file [date] sent mail to <address> Or whatever. I can bash this together ...
2
votes
1answer
263 views

Format Filename for Process Core Files per Session

Is there a way to change the core filename format per session instead of for the entire machine? On Linux the only way I can find is using sysctl as root: sudo /sbin/sysctl -w ...
1
vote
1answer
2k views

Troubleshooting PHP High CPU on Production Server

We're trying to find a bug that will cause multiple PHP processes to be run at the same time and thus eating up the CPU resources for around 5 minutes. During these 5 minutes, our server will totally ...
0
votes
2answers
303 views

capture traffic between boards at PC using wireshark

I have two board connected using ethernet interface by means of switch. I have a linux machine connected to the switch where I run wireshark. I assign same IP address range for both boards and the ...