Random tech issues we face
ulimit is a shell command to control the resources available to a bash shell and all the programs that are started from this shell. We can get and set the ulimit of a process or a user Ulimit of a process Ulimit of a process can be found by doing cat of /process/<pid>/limits. Ulimit of a …
First download certificate in java file Import it using keytool command Java Trust store location : <JRE_HOME>/lib/security/cacerts
Sometime back I got below error while connecting to SSL secured site in java. I was using java 8 update 60. Why this error comes and how to resolve it. We will see that. PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target Before getting into solution, I would like …
Recently faced an issue where the docker stop was not calling a shutdown hook was not working correctly. The same application when run as a spring boot applicaiton or jar without docker invokes the shutdownhook. During debugging found that the boot app inside the container is not geting SIGTERM when docker stop command is being issued. The boot …
Remove all existing keysGenerate ssh key for the current user which wants to commit to githubadd the ssh key for new userInitialise the new Repository Add the remote url ( here note that we are not using https url)Add user name and email to git configCommit and push to git
Requirement: Update log4j2.properties on all elastic search servers, restart them and check if logs are being rolled and purged over or not. Use Case 1: Take backup of existing log4j2.properties if existsUpdate log4j2.properties of all the elastic search data and master nodesRestart elastic search server playbook : log4j-update.yml Use Case 2: Check whether elastic search service …
Sometimes, we have seen in logs same exception occurs continuously and you get full stacktrace of that exception. But after some time, you just get only exception message not full stack trace. The reason for this is below from java doc. The compiler in the server VM now provides correct stack backtraces for all …
Use below command for sorting process by memory usage. ps aux –sort -rss
We create threads in application to improve performance. So, how many maximum threads can we create?? You might wondering we can create threads as much as memory is available in system. So If you try running below program, what is the output you are going to get?? So, only 2029 threads in my application. I …
Spent few hours to upgrade the version of `style.css` for a wordpress theme Finally got following, Assume you want to bump up the version of style.css for twentysixteen theme. Go To /wp-content/themes/twentysixteen/functions.php