Problem Running RoboRunner

Jump to navigation Jump to search

Problem Running RoboRunner

I'm finally at the point where I am trying to actually launch RoboRunner. Currently running into an error I will have to debug. Posting part of the stack trace here in case anyone wants to comment.

Copying missing bots... 0 JAR copies done!
Initializing engine: robocodes\z1... Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at robowiki.runner.BattleRunner.initEngine(BattleRunner.java:66)
	at robowiki.runner.BattleRunner.<init>(BattleRunner.java:42)
	at robowiki.runner.RoboRunner.<init>(RoboRunner.java:172)
	at org.xandercat.roborunner.runner.RoboRunnerService.startRunner(RoboRunnerService.java:44)
	at org.xandercat.roborunner.runner.action.LaunchRoboRunnerAction.actionPerformed(LaunchRoboRunnerAction.java:46)
	at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)

And the chunk of relevant code from RoboRunner:

      System.out.print("Initializing engine: " + enginePath + "... ");
      ProcessBuilder builder = new ProcessBuilder(command);
      builder.redirectErrorStream(true);
      Process battleProcess = builder.start();
      BufferedReader reader = new BufferedReader(
          new InputStreamReader(battleProcess.getInputStream()));
      String processOutput;
      do {
        processOutput = reader.readLine();
      } while (!processOutput.equals(BattleProcess.READY_SIGNAL));
      System.out.println("done!");
      _processQueue.add(battleProcess);

Presumably, the input stream never provided the BattleProcess.READY_SIGNAL. I'll have to do some digging to figure out why. I'm not entirely clear on what the RoboRunner requirements are, but at the moment I am running it under Java 6 with Robocode 1.7.3.0.

Skotty19:31, 5 December 2012

FYI -- line 66 is the while part of the do/while loop.

Skotty19:32, 5 December 2012
 

I'll take a deeper look later when I'm home. At a glance, it seems like processOutput is coming up null - maybe the condition should be "processOutput != null && ...". What command are you using to launch this?

Voidious20:03, 5 December 2012
 

Looks like the problem was I didn't have one of the needed Robocode jars in the classpath. Thanks for including source in the RoboRunner jar; that made debugging easier.

Skotty21:16, 5 December 2012
 

Fixing the classpath fixed the problem I was having. Also, I am running RoboRunner via new RoboRunner(...) and then calling the runBattles() method. I need to dig a little deeper to determine how best to extract the battle results; at the moment it is just letting RoboRunner barf them on System.out. :-)

Skotty21:41, 5 December 2012
 

One thing is for sure -- it runs oodles faster than RoboResearch. I'm definitely switching. I suppose it may have been possible to branch RoboResearch to run battles a la RoboRunner, but I'm having fun building a new UI, so I'm continuing on.

Skotty21:45, 5 December 2012
 

You do not have permission to edit this page, for the following reasons:

  • The action you have requested is limited to users in the group: Users.
  • You must confirm your email address before editing pages. Please set and validate your email address through your user preferences.

You can view and copy the source of this page.

Return to Thread:Talk:RoboJogger/Problem Running RoboRunner/reply (6).