Why can't I step through Java API classes?

Question

I have set a breakpoint in String class. On running the program in debug mode the breakpoint is hit but I cannot step into the code. Pressing F5 resumes the execution to next breakpoint. I have removed java.* package from step filters.

I am using Groovy grails toolsuite instead of vanilla Eclipse.

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Edit: Eclipse does seem to have source archive: enter image description here

@orionll I tried that. Didn't work. Seems to be a bug in GGTS. I tried this in vanilla Eclipse and it works. — Kshitiz Sharma, May 29 '14 at 04:13
The distinguishing feature of StringCoding is that it is package private ...... — Stephen C, May 29 '14 at 04:20
@StephenC I don't understand how accessibility of the Class should affect debugging. And the source for JDK is included in `src.zip`, which is correctly attached to `rt.jar`. — Kshitiz Sharma, May 29 '14 at 04:28
Possibly: http://stackoverflow.com/questions/18255474/debug-jdk-source-cant-watch-variable-what-it-is — assylias, May 29 '14 at 05:57
@KshitizSharma - neither do I. Nevertheless, that's what is different about it. Have you checked that the source for that class is in the src.zip file?? — Stephen C, May 29 '14 at 06:05

score 0 · Answer 1 · answered Jun 04 '14 at 05:34

This is a defect in Groovy Grails Toolsuite bundle.

I wanted to localize the fault, so I started with vanilla eclipse and installed each plugin in the bundle individually until the problem occured. It showed up when I installed Grails IDE plugin.

The way to get around this problem is take a vanilla eclipse and install Groovy Eclipse and Spring IDE separately. This will also make eclipse run faster as it'll avoid other stuff that comes bundled with GGTS.

Andrew Eisenberg · Accepted Answer · 2014-06-06T16:17:10.833

0

GGTS has step filters on by default. Go to Preferences -> Java -> Debug -> Step filtering to disable it. You also may need to go to Preferences -> Groovy -> Debugger -> Extended debugging and disable all preferences there.

edited Jun 06 '14 at 16:17

answered Jun 06 '14 at 15:31

Andrew Eisenberg

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In the question I've clearly mentioned that I've properly configured Step filters. A screenshot is attached. – Kshitiz Sharma Jun 06 '14 at 15:41
Make sure that you also have Extended debugging disabled. By default, it only applies to Groovy projects, but there is an option to turn it on globally. Disable all of that to be sure. – Andrew Eisenberg Jun 06 '14 at 16:18
I'll check that on Monday morning and let you know. Although I suspect that its something to do with `Grails IDE` plugin as I've mentioned in my answer. – Kshitiz Sharma Jun 07 '14 at 05:57
The only interaction that Grails IDE has in that area is through those options I mention above. – Andrew Eisenberg Jun 08 '14 at 02:18
Your suggestion works. However when I disable extended debugging the Display view stops working. Evaluating an expression gives a NP. – Kshitiz Sharma Jun 19 '14 at 07:33

Why can't I step through Java API classes?

2 Answers2