sap1ens commented on code in PR #370:
URL:
https://github.com/apache/flink-kubernetes-operator/pull/370#discussion_r977209625
##########
flink-kubernetes-operator/src/main/java/org/apache/flink/kubernetes/operator/validation/DefaultValidator.java:
##########
@@ -180,10 +180,6 @@ private Optional<String> validateJobSpec(
return Optional.empty();
}
- if (StringUtils.isNullOrWhitespaceOnly(job.getJarURI())) {
- return Optional.of("Jar URI must be defined");
- }
Review Comment:
Hey @jeesmon, I've tweaked `AbstractFlinkService` to pass an empty noop jar,
however now I'm seeing an exception on the JobManager side:
```
Caused by: java.lang.ClassNotFoundException:
org.apache.flink.streaming.examples.statemachine.StateMachineExample
at java.net.URLClassLoader.findClass(Unknown Source) ~[?:?]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:?]
at
org.apache.flink.util.FlinkUserCodeClassLoader.loadClassWithoutExceptionHandling(FlinkUserCodeClassLoader.java:68)
~[flink-dist-1.15.2.jar:1.15.2]
at
org.apache.flink.util.ChildFirstClassLoader.loadClassWithoutExceptionHandling(ChildFirstClassLoader.java:65)
~[flink-dist-1.15.2.jar:1.15.2]
at
org.apache.flink.util.FlinkUserCodeClassLoader.loadClass(FlinkUserCodeClassLoader.java:52)
~[flink-dist-1.15.2.jar:1.15.2]
at java.lang.ClassLoader.loadClass(Unknown Source) ~[?:?]
at
org.apache.flink.runtime.execution.librarycache.FlinkUserCodeClassLoaders$SafetyNetWrapperClassLoader.loadClass(FlinkUserCodeClassLoaders.java:172)
~[flink-dist-1.15.2.jar:1.15.2]
at java.lang.Class.forName0(Native Method) ~[?:?]
at java.lang.Class.forName(Unknown Source) ~[?:?]
at
org.apache.flink.client.program.PackagedProgram.loadMainClass(PackagedProgram.java:479)
~[flink-dist-1.15.2.jar:1.15.2]
at
org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:153)
~[flink-dist-1.15.2.jar:1.15.2]
at
org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:65)
~[flink-dist-1.15.2.jar:1.15.2]
at
org.apache.flink.client.program.PackagedProgram$Builder.build(PackagedProgram.java:691)
~[flink-dist-1.15.2.jar:1.15.2]
at
org.apache.flink.runtime.webmonitor.handlers.utils.JarHandlerUtils$JarHandlerContext.toPackagedProgram(JarHandlerUtils.java:182)
~[flink-dist-1.15.2.jar:1.15.2]
```
My job config is the following:
```
apiVersion: flink.apache.org/v1beta1
kind: FlinkSessionJob
metadata:
name: basic-session-job-only-example-noop2
spec:
deploymentName: basic-session-deployment-only-example
job:
entryClass:
org.apache.flink.streaming.examples.statemachine.StateMachineExample
parallelism: 4
upgradeMode: stateless
```
I've manually copied the jar file with the StateMachineExample class to the
/opt/flink/lib folder.
After analyzing the code it looks like Flink creates and utilizes a special
classloader that only uses the uploaded jar and nothing else. Of course, it
can't find anything since the jar is empty.
What do I miss?
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