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Could not debug, because UTFDataFormatException is thrown when reaching breakpoint [message #898009]

Wed, 25 July 2012 15:29

Martin Benedict

Messages: 22
Registered: June 2012

Junior Member

Always when I try to debug my ATL script and breakpoint is reached an UTFDataFormatException is thrown which tells me the following stack trace.

java.io.UTFDataFormatException: encoded string too long: 343862 bytes
	at java.io.DataOutputStream.writeUTF(Unknown Source)
	at java.io.DataOutputStream.writeUTF(Unknown Source)
	at org.eclipse.m2m.atl.debug.core.adwp.ADWP.writeValue(ADWP.java:142)
	at org.eclipse.m2m.atl.debug.core.adwp.ADWP.sendMessage(ADWP.java:225)
	at org.eclipse.m2m.atl.engine.emfvm.launch.debug.NetworkDebugger$3.doIt(NetworkDebugger.java:308)
	at org.eclipse.m2m.atl.engine.emfvm.launch.debug.NetworkDebugger.dialog(NetworkDebugger.java:227)
	at org.eclipse.m2m.atl.engine.emfvm.launch.debug.NetworkDebugger.step(NetworkDebugger.java:151)
	at org.eclipse.m2m.atl.engine.emfvm.lib.ExecEnv.stepTools(ExecEnv.java:1886)
	at org.eclipse.m2m.atl.engine.emfvm.ASMOperation.exec(ASMOperation.java:330)
	at org.eclipse.m2m.atl.engine.emfvm.ASMOperation.exec(ASMOperation.java:388)
	at org.eclipse.m2m.atl.engine.emfvm.ASMOperation.exec(ASMOperation.java:388)
	at org.eclipse.m2m.atl.engine.emfvm.ASMOperation.exec(ASMOperation.java:388)
	at org.eclipse.m2m.atl.engine.emfvm.ASM.run(ASM.java:208)
	at org.eclipse.m2m.atl.engine.emfvm.launch.EMFVMLauncher.internalLaunch(EMFVMLauncher.java:170)
	at org.eclipse.m2m.atl.engine.emfvm.launch.EMFVMUILauncher.launch(EMFVMUILauncher.java:43)
	at org.eclipse.m2m.atl.core.service.LauncherService.launch(LauncherService.java:136)
	at org.eclipse.m2m.atl.core.ui.launch.AtlLaunchConfigurationDelegate$1.run(AtlLaunchConfigurationDelegate.java:274)

Does anybody has an idea what could be the reason of the exception. Perhaps its my file it contains about 900 lines of code, but I think this should ATL can handle, shouldn't it?
After stopping the debug-run and starting it again the variables couldn't be analyzed.

I already filed a bug (https://bugs.eclipse.org/bugs/show_bug.cgi?id=385849), but I hope to find anybody who have also this problem. Is there anybody out there. Or has anybody an idea what could be the problem?

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Re: Could not debug, because UTFDataFormatException is thrown when reaching breakpoint [message #899163 is a reply to message #898009]

Mon, 30 July 2012 17:30

Dennis Wagelaar

Messages: 147
Registered: July 2009

Senior Member

Op 25-07-12 17:29, Martin Benedict schreef:
> Always when I try to debug my ATL script and breakpoint is reached an
> UTFDataFormatException is thrown which tells me the following stack trace.
>
>
> java.io.UTFDataFormatException: encoded string too long: 343862 bytes
> at java.io.DataOutputStream.writeUTF(Unknown Source)
> at java.io.DataOutputStream.writeUTF(Unknown Source)
> at org.eclipse.m2m.atl.debug.core.adwp.ADWP.writeValue(ADWP.java:142)
> at org.eclipse.m2m.atl.debug.core.adwp.ADWP.sendMessage(ADWP.java:225)
> at
> org.eclipse.m2m.atl.engine.emfvm.launch.debug.NetworkDebugger$3.doIt(NetworkDebugger.java:308)
>
> at
> org.eclipse.m2m.atl.engine.emfvm.launch.debug.NetworkDebugger.dialog(NetworkDebugger.java:227)
>
> at
> org.eclipse.m2m.atl.engine.emfvm.launch.debug.NetworkDebugger.step(NetworkDebugger.java:151)
>
> at org.eclipse.m2m.atl.engine.emfvm.lib.ExecEnv.stepTools(ExecEnv.java:1886)
> at org.eclipse.m2m.atl.engine.emfvm.ASMOperation.exec(ASMOperation.java:330)
> at org.eclipse.m2m.atl.engine.emfvm.ASMOperation.exec(ASMOperation.java:388)
> at org.eclipse.m2m.atl.engine.emfvm.ASMOperation.exec(ASMOperation.java:388)
> at org.eclipse.m2m.atl.engine.emfvm.ASMOperation.exec(ASMOperation.java:388)
> at org.eclipse.m2m.atl.engine.emfvm.ASM.run(ASM.java:208)
> at
> org.eclipse.m2m.atl.engine.emfvm.launch.EMFVMLauncher.internalLaunch(EMFVMLauncher.java:170)
>
> at
> org.eclipse.m2m.atl.engine.emfvm.launch.EMFVMUILauncher.launch(EMFVMUILauncher.java:43)
>
> at
> org.eclipse.m2m.atl.core.service.LauncherService.launch(LauncherService.java:136)
> at
> org.eclipse.m2m.atl.core.ui.launch.AtlLaunchConfigurationDelegate$1.run(AtlLaunchConfigurationDelegate.java:274)
>
>
>
> Does anybody has an idea what could be the reason of the exception. Perhaps
> its my file it contains about 900 lines of code, but I think this should ATL
> can handle, shouldn't it?
> After stopping the debug-run and starting it again the variables couldn't be
> analyzed.
>
> I already filed a bug (https://bugs.eclipse.org/bugs/show_bug.cgi?id=385849),
> but I hope to find anybody who have also this problem. Is there anybody out
> there. Or has anybody an idea what could be the problem?

Interesting issue! Your breakpoint is on a method that returns a String, which
the debugger tries to copy over a TCP socket back to Eclipse, so that you can
view it. Apparently, java.io.DataOutputStream.writeUTF() does not handle
writing Strings as long as yours. Do you really have String values of over
300kB in your model?

Dennis

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