java.lang.IllegalArgumentException: Invalid or unreadable WAR file : error in opening zip file

Question

I got this error in Catalina.2011-03-30.log when my display.war file executed on Tomcat. The error is shown below:

Mar 30, 2011 8:01:31 PM org.apac         


        

Answer 1

The Cause is clearly shown:

java.lang.IllegalArgumentException: Invalid or unreadable WAR file : error in opening zip file  

A WAR (Web ARchive) file is a zip file containing your classes, libraries and resources for your web application.

Rename your WAR file from a.war to a.zip. If you can't open the zip file using Winzip/7-Zip/WinRar, rebuild your WAR file again.

Hope this helps.