Author Archives: parasjain01

Liferay 6 Certification Preparation Tips

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How to prepare There is no shortcut. Don’t rely on any sample questions online(including this post) completely. Best way to prepare is to practice tutorial here . Even the experienced developers should try to go through the tutorial, try to create portlets, hooks and learn the concepts by doing things. One… Read more »

“A Cloud Guru” vs “Linux Academy” vs CloudAcademy

Disclaimer – This post is based on my personal experience. I have spent more than 8 months with A Cloud Guru and just a few weeks with other two services – Linux Academy and CloudAcademy. I am NOT associated or affiliated with any of the services and/or product mentioned in the post…. Read more »

Default profile (default.properties) for Patching Liferay on Jboss

You can always use patching tool’s auto-discovery option to generate a profile. In case you are not able to use that following are the sample settings for JBoss. Just create default.properties under patching-tool directory

Key properties to remember are war.path which should point to your ROOT.war directory and global.lib.path… Read more »

Tomcat – How to resolve java.util.zip.ZipException: error in opening zip file

This post is not necessarily about any specific technology. Just wanted to tell you about one possible reason for this commonly faced problem. I was working on a Spring MVC application lately and I got the following error SEVERE [localhost-startStop-4] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/springcaptcha]] at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:153)… Read more »

Multiple files upload in Liferay 6.1

Today I have found a weird bug in Liferay’s UploadServletRequestImpl in the following method

  The intention of the above code is to return the full name of the file(s) being uploaded. But actually the above code returns the name of the first file uploaded on the form with the name… Read more »

JournalVmUtil in Liferay 6.1

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Disclaimer – Following is not the best or optimal solution. If you have better suggestion please write in comments JournalVmUtil was present upto Liferay 5.2 and then deprecated in Liferay 6.0 and then completed removed in Liferay 6.1. If you are upgrading to 6.1 and make extensive use of JournalVmUtil… Read more »