Technical notes, and other ideas.
Refer: https://tecadmin.net/tutorial/bash-scripting/bash-debugging/
Example – Enable Debug in Script
You can enable debug mode by adding set -xv option inside a shell script. This is useful to enable debugging for some part of the script.
#!/bin/bash
set -xv # this line will enable debug
cd /var/log/
for i in "*.log"; do
du -sh $i
doneRefer: 20120503 Debugging JBoss 100 Percent CPU Usage.pdf
There's a quick and dirty way of identifying which threads are using up the CPU time on JBoss. Go the the JMX Console with a browser (usually on http://localhost:8080/jmx-console, but may be different for you), look for a bean called ServerInfo, it has an operation called listThreadCpuUtilization which dumps the actual CPU time used by each active thread, in a nice tabular format. If there's one misbehaving, it usually stands out like a sore thumb.
There's also the listThreadDump operation which dumps the stack for every thread to the browser.
Not as good as a profiler, but a much easier way to get the basic information. For production servers, where it's often bad news to connect a profiler, it's very handy.
From: Mounagurusamy, Jayakumar (HAL)
Sent: Thursday, February 02, 2012 1:08 PM
To: Fernan, Diana (HAL Contractor) expires 30 days until HR approval; Ruckman, Maurice (HAL)
Cc: Harrington, Scott (HAL Contrator); c-dfernan@hollandamerica.com; Bueing, Teresa (HAL)
Subject: RE: eZair - Hyperlink in POLAR Admin Access
Maurice,
Here is the log file location, can you please take a look?
\itnasweb_nonprod$tst01_logststezair
After storage moved:
\nasitweb_nonprod$tst01_logststezair
Change the following attributes in the web.config file to get output on the page with errors:
Sample location:
C:\Inetpub\wwwroot\wss\VirtualDirectories\test-eFleet80\web.config
Append the following to your url ?contents=1, such as
http://mysite/itsbroken/?contents=1
This throws the page into debug mode to disable the bad parts.