“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

I got the PWC6345 error when running jetty-runner 9.2.1 standalone from Windows 7 cmd (or batch file) with Oracle JDK 1.7.0_60, and none of the other suggestions in this or other forums worked. I'll leave my workaround here, in case it helps someone...

After installing the JDK, running 'where java' showed two different java.exe paths, the first being in the Windows system folder, and the second in the JDK folder (which is the one I added to the path manually). Both of these are actually installed by the same JDK installer. The java.exe in the system folder was taking precedence and causing the full JDK to go undetected.

Placing the JDK bin folder (e.g. "C:\Program Files\java\jdk1.7.0_60\bin") on the path before the other system paths fixed the issue.

Answer 2

I got this error when deploy war package to our server.

My deploy command is (applied web container you may find):

java  -jar jetty-runner.jar  --port 8020 xx.war

I write this answer because it confused me almost one day. I tried some methods above but failed.

Finally I found there is only jre on my servers but not full jdk.

$ls /usr/lib/jvm/java-1.8.0-openjdk-1.8.0.131-2.b11.el7_3.x86_64
jre

I fix it with searching available jdk and install one.

$yum search java | grep 'java-'
$sudo yum install java-1.8.0-openjdk-devel.x86_64

(Notice the -devel)