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Most trusted JOB oriented professional program
DevOps Certified Professional (DCP)

Take your first step into the world of DevOps with this course, which will help you to learn about the methodologies and tools used to develop, deploy, and operate high-quality software.

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DevOps to DevSecOps – Learn the evolution
DevSecOps Certified Professional (DSOCP)

Learn to automate security into a fast-paced DevOps environment using various open-source tools and scripts.

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Get certified in the new tech skill to rule the industry
Site Reliability Engineering (SRE) Certified Professional

A method of measuring and achieving reliability through engineering and operations work – developed by Google to manage services.

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Master in DevOps Engineering (MDE)

Get enrolled for the most advanced and only course in the WORLD which can make you an expert and proficient Architect in DevOps, DevSecOps and Site Reliability Engineering (SRE) principles together.

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Azure DevOps Solutions Expert

Learn about the DevOps services available on Azure and how you can use them to make your workflow more efficient.

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Learn and get certified
AWS Certified DevOps Professional

Learn about the DevOps services offered by AWS and how you can use them to make your workflow more efficient.

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Jenkins Troubleshooting Guide

jenkins-troubleshooting

jenkins-troubleshooting

Jenkins Troubleshooting

Jenkins is one of the important CI tools which many organization used as part of their Build and DevOps infrasture. I am going to consolidate all the troubshooting techniques which can be used in order to find any issues related in jenkins.

Step 1. Take a look at Log generated by the jenkins and plugins via http://jenkins-master/log

Note: Here you can also create your own logger and and set your custom log levels such as (severe, warning, info, config, file, finer, finest, all)

Step 2. Also, you can look at /var/log/jenkins/jenkins.log via doing “tail -f /var/log/jenkins/jenkins.log” and check carefully whats breaking it.

Log file in windows – jenkins.err.log & jenkins.out.log

Slave log file in windows – logs\slaves

Step 3. Check the system log file

Step 4. Few Jenkins plugins which can you help you
https://wiki.jenkins-ci.org/display/JENKINS/Monitoring

Step 4. Make sure your Jenkins & installed plugins version is installed with most uptodate stable release.

Some Common issues:
Issues 1. If Jenkins hangs, follow https://wiki.jenkins-ci.org/display/JENKINS/Jenkins+is+hanging

Issues 2 Site is down with no 404 messages
Cause- Jenkins had an Out of Memory (OOM) error causing the server to kill the jenkins instance
Solution: Restart server; Review heap logs to identify root cause of error

Issues 3 Site is up however no jobs are displayed
Cause 1: AWS Server rebooted but data volume did not mount properly
Solution: mount <device> <path> on the instance

Issues 4 – java.lang.outofmemoryerror permgen space issues

Solution – http://www.scmgalaxy.com/scm/build-workflow-management/jenkins/jenkins-java-lang-outofmemoryerror-permgen-space-issues.html

Rajesh Kumar
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