[FLINK-900] Webclient does not show System.out messages

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: pre-apache, 0.6-incubating
• Labels: github-import
• Assignee: Robert Metzger
• Reporter: GitHub Import
• Created: 09/Jun/14 13:06
• Updated: 18/Jun/14 12:13
• Resolved: 18/Jun/14 12:13

Description

When submitting the KMeans Job using the web client, I'm getting the following exception:
```
An error occurred while invoking the program:

The program plan could not be fetched. The program silently swallowed the control flow exceptions.

eu.stratosphere.client.program.ProgramInvocationException: The program plan could not be fetched. The program silently swallowed the control flow exceptions.
at eu.stratosphere.client.program.Client.getOptimizedPlan(Client.java:154)
at eu.stratosphere.client.web.JobSubmissionServlet.doGet(JobSubmissionServlet.java:161)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:735)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:532)
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:453)
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:227)
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:965)
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:388)
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:187)
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:901)
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:117)
at org.eclipse.jetty.server.handler.HandlerList.handle(HandlerList.java:47)
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:113)
at org.eclipse.jetty.server.Server.handle(Server.java:352)
at org.eclipse.jetty.server.HttpConnection.handleRequest(HttpConnection.java:596)
at org.eclipse.jetty.server.HttpConnection$RequestHandler.headerComplete(HttpConnection.java:1048)
at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:549)
at org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:211)
at org.eclipse.jetty.server.HttpConnection.handle(HttpConnection.java:425)
at org.eclipse.jetty.io.nio.SelectChannelEndPoint.run(SelectChannelEndPoint.java:489)
at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:436)
at java.lang.Thread.run(Thread.java:744)
```

The problem is that the main() method just returns (printing a message to `System.out`).
This is not very intuitive, since you have to look into the webclient.out log

---------------- Imported from GitHub ----------------
Url: https://github.com/stratosphere/stratosphere/issues/900
Created by: rmetzger
Labels:
Milestone: Release 0.5.1
Created at: Tue Jun 03 12:25:04 CEST 2014
State: open