Github user sachingoel0101 commented on a diff in the pull request:
https://github.com/apache/flink/pull/1214#discussion_r43098720
--- Diff:
flink-clients/src/main/java/org/apache/flink/client/CliFrontend.java ---
@@ -909,7 +919,21 @@ private int handleError(Throwable t) {
}
LOG.error("Error while running the command.", t);
- t.printStackTrace();
+ // check if the error was due to an invalid program in detached
mode.
+ if (t instanceof ProgramInvocationException && t.getCause()
instanceof DetachedProgramException) {
+ System.err.println(t.getCause().getMessage());
+ // now trace to the user's main method. We don't wanna
show unnecessary information
+ // in this particular case.
--- End diff --
True. I didn't wanna change the existing stack traces.
This will require maintaining a global variable for whether the program was
run in interactive mode. The `DetachedProgramException` is a special case where
we don't wanna clutter the stack trace with flink's trace, instead just show
the user program's stack trace.
In other cases, this might not be the case.
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