Knime Server - NoClassDefFound EclipseCompiler

KNIME Server
1

Hello,

Not sure if there's a special category for Knime Server questions. I'm trying to run a workflow containing a Java Snippet node on the Server and I get a NoClassDefFound for org.eclipse.jdt.internal.compiler.tool.EclipseCompiler, the workflow runs fine on KAP.

Did a bit of debugging and knime_server/knime_executor (which I assume is used by the server) contains:

./plugins/org.eclipse.jdt.compiler.apt_1.2.100.v20160418-1457.jar
./plugins/org.eclipse.jdt.compiler.tool_1.1.100.v20160418-1457.jar

The compiler.tool jar contains the required jar. How to debug why it's not getting loaded?

We are using KAP 3.3.1 and Server version: 4.4.0

Thanks and Best Regards,

Cosmin

2

Does the Java Snippet work when you start the KNIME Analytics Platform GUI from the same installation? You could also try to start it once with "-clean" as argument.

3

Hello Thor,

I've searched the logs and found the problem, the following folder was not present(not sure why) + some internal folders had root as owner thus preventing correct file creation. Thank you very much for your help

(/home/tomcat/knime_server/workflow_repository/runtime/runtime_knime-rmi-50100/.metadata/.plugins/org.eclipse.core.resources)