[jira] [Created] (FLINK-8187) Web client does not print errors

["Timo Walther (JIRA)" <ji...@apache.org>]

Timo Walther created FLINK-8187:
-----------------------------------

             Summary: Web client does not print errors
                 Key: FLINK-8187
                 URL: https://issues.apache.org/jira/browse/FLINK-8187
             Project: Flink
          Issue Type: Bug
          Components: Webfrontend
            Reporter: Timo Walther


When submitting a jar with no defined Main class, the web client does not respond anymore and instead of printing the REST error:

{code}
java.util.concurrent.CompletionException: org.apache.flink.util.FlinkException: Could not run the jar.
	at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.lambda$handleJsonRequest$0(JarRunHandler.java:90)
	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1590)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: org.apache.flink.util.FlinkException: Could not run the jar.
	... 9 more
Caused by: org.apache.flink.client.program.ProgramInvocationException: Neither a 'Main-Class', nor a 'program-class' entry was found in the jar file.
	at org.apache.flink.client.program.PackagedProgram.getEntryPointClassNameFromJar(PackagedProgram.java:592)
	at org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:188)
	at org.apache.flink.client.program.PackagedProgram.<init>(PackagedProgram.java:147)
	at org.apache.flink.runtime.webmonitor.handlers.JarActionHandler.getJobGraphAndClassLoader(JarActionHandler.java:72)
	at org.apache.flink.runtime.webmonitor.handlers.JarRunHandler.lambda$handleJsonRequest$0(JarRunHandler.java:69)
	... 8 more
{code} 



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