“PWC6345: There is an error in invoking javac.” error when using Jetty WTP plugin to deploy a JSP page on Jetty

Question

I\'m trying to deploy a JSP-page on Jetty, using the Jetty WTP plugin for Eclipse. But I get the error below. It looks like Jetty can\'t find javac. Is there an

Answer 1

In addition to updating the JAVA_HOME (see above)... If you're encountering this error from command line (e.g. starting Jetty server from dos window), check where windows is finding the java.exe:

where java

If windows comes back with a path showing to your jre, then check your PATH. Chances are the %PATH% contains a path pointing to the jre instead of jdk.

Answer 2

Ok, solved this after a lot of searching around.

Download any jdk and point JAVA_HOME to this jdk. Inside this jdk folder you will find ./bin and ./jre/bin Copy the javac from ./bin and paste it in ./jre/bin [remember copy not cut]

Now in eclipse, Run->External-Tools->External-Tools-Configurations, select the build.xml for of your project in the left pane and click on the JRE tab in the right pane. Click on installed JREs and add the jdk in the previous step. Once done, select this new JRE (jdk1.6.0_31) as the 'Separate JRE', click on apply at the bottom and run.

This assumes you are doing a jetty:run using ant on eclipse.

Answer 3

I have the same problem. When I run where java, the output is:

C:\Windows\System32\java.exe

D:\Program Files\Java\jdk1.7.0_25\bin\java.exe

Of course the first one is incorrect. So my problem lies in the PATH. I can rectify this by either removing the java.exe in the directory C:\Windows\System32\ because I'm sure it's useless, or putting the second entry in front of the first one.

So When encountering this problem, please check your PATH for the jdk. I hope that my problem and my solution is helpful in some way.

Answer 4

if you set environment variable JRE_HOME , please unset or delete it and start server again .

Answer 5

Strange because this thread suggests:

The solution was to install the package jdk7-openjdk.
Perhaps this should be added to the list of dependencies (or maybe for jetty, and not solr itself)?

But that doesn't help much on Windows, where the binary for openjdk7 aren't easily available.
(In "OpenJDK availability for Windows OS" comments, eckes mentions having found some openjdk binaries for Windows, as part of the Build b146. However, said releases aren't maintained any more)

The bug report filled by the OP Jonas is closed with a simple reference to the Eclipse wiki page "Jetty/Howto/Configure JSP".

Answer 6

I added this line to 'eclipse.ini' file which is present inside eclipse folder.

-vm C:\Program Files\Java\jdk1.8.0_131\bin\javaw.exe

and I also change the JRE path in eclipse

windows -> preferences -> java -> Installed JREs

and provided path upto jdk

C:\Program Files\Java\jdk1.8.0_131