Error: Archive for required library cannot be read

Question

I am having trouble setting up the build path of my java project. I am currently in a Co-Op IT position so I am somewhat new to all this. My background is mostly in C++ and I am learning java on the fly. I am also somewhat new to Eclipse (Kepler service release 1).

I am working on a bug on an existing program and need to get the program to build so I can work on it. When I add all of the external .jar files that I know for a fact are the right ones, I am getting this error on two of them :

"Archive for required library: '(location of file)' cannot be read or is not a valid ZIP file"

Two of the other full time guys on my team have gotten the program to run with those exact same .jar files, one running Eclipse Indigo and the other running the same Kepler version as myself. I also was able to open the two .jar files manually and everything appears to be there. After every trial trying to fix this, I have refreshed, cleaned and restarted eclipse. The two other full time guys said they have never seen this error. I would like to get some insight on this from anyone who has any similar experiences so that I don't have to use up much more of their time.

Answer 1

I had the same error here. What I did to resolve the problem was close and reopen the project.

Answer 2

I got the same problem and found out the root cause is the JDK in my linux shell is set to 1.6, but in the eclipse, the JRE is 1.7.

Answer 3

Just came across this link that shows a way to get unblocked. In preferences dialog box go to

Java->Compiler->Building

and change Incomplete build path to "Warning" (from default "Error") This can be done globally (for all projects), or on a project by project basis.

Answer 4

I got this problem, took help from following link solution which basically says to 1. delete the corresponding maven download folder 2. maven>update project in eclipse

In my case I deleted hibernate folder, since i was getting error related to hibernate-validator.jar

Answer 5

i fixed this by just deleting everything inside of the /Users/username/.m2/repository folder. not the repository folder itself. and then running a mvn clean package in the project folder

Answer 6

In my case ..worked after removing this from spirngrest-servlet.xml file.

    <prop key="net.sf.ehcache.configurationResourceName">/Sysehcache.xml</prop>

I think it had to do with default location of maven repository of jar files. Been at it for 3 days. finally solved it.Hope it helps anyone.Just look for similar think in your spirngrest-servlet.xml file. Good luck.