Jenkins returns null instead of error in output - groovy

Question

There is my code
def build() {
try {
// some build gradle task here
// gradle install task
}
catch(Throwable err) {
// println "DEBUGGGGGGG"
globalVar.echo "TEST#"
globalVar.echo "TEST#"
globalVar.echo err.getMessage()
globalVar.echo "TEST"
globalVar.echo err.getCause()
globalVar.echo "TESTSSSS"
throw err
}
finally {
}
jenkins Output from my job:
Pipeline] echo
TEST#
[Pipeline] echo
TEST#
[Pipeline] echo
null
[Pipeline] echo
TEST
Finished: FAILURE [Pipeline] echo null [Pipeline] echo TESTSSSS
then trows Exception
hudson.model.Run$RunnerAbortedException
at org.jfrog.hudson.pipeline.common.executors.GradleExecutor.exe(GradleExecutor.java:144)
at org.jfrog.hudson.pipeline.common.executors.GradleExecutor.execute(GradleExecutor.java:69)
at org.jfrog.hudson.pipeline.scripted.steps.ArtifactoryGradleBuild$Execution.run(ArtifactoryGradleBuild.java:89)
at org.jfrog.hudson.pipeline.scripted.steps.ArtifactoryGradleBuild$Execution.run(ArtifactoryGradleBuild.java:65)
at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1$1.call(AbstractSynchronousNonBlockingStepExecution.java:47)
at hudson.security.ACL.impersonate(ACL.java:290)
at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1.run(AbstractSynchronousNonBlockingStepExecution.java:44)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:748)
How can I get Exception cause ? in my case if i run gradle install from command line ( without jenkins ) is :
error: incompatible types: cannot be converted to boolean
but I would to see error in jenkins job console output

Answer 1

Try -
try{
//your code
}
catch (exc){
println exc
}
Works for me.