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Posted to notifications@netbeans.apache.org by GitBox <gi...@apache.org> on 2022/10/08 14:36:30 UTC
[GitHub] [netbeans] blakemcbride opened a new issue, #4754: Debug info not updated when code dynamically re-loaded
blakemcbride opened a new issue, #4754:
URL: https://github.com/apache/netbeans/issues/4754
### Apache NetBeans version
Apache NetBeans 15
### What happened
Rather than compiling code and then running it, my system compiles, dynamically loads, and then runs code. The benefit of this is that code can be changed at runtime on a live system without having to compile or re-boot a production server. This is something I have been using for years in production environments. It works well. The actual source code for this is at [https://github.com/blakemcbride/Kiss](https://github.com/blakemcbride/Kiss)
Previously, I used IntelliJ. Debugging this code in a live environment and changing it dynamically worked as expected. However, NetBeans doesn't seem to update its debug info when I dynamically change code. The first time I execute the code, NetBeans debugs fine. However, after I change the code, NetBeans seems to have its line numbers off. So, the new code is executing, but NetBeans is using debug info from the original load.
Again, this is production code that has been working perfectly for years. With IntelliJ, I have been able to debug updated code without a problem. And there has never been a problem in production. When I update a file, the new code gets executed just fine.
I created two videos that demonstrate the problem. The first video shows code that is dynamically loaded. It debugs just fine. The second video shows a debug session after it has been changed and re-loaded. You can see that NetBeans is using the wrong line number information. Here are links to the two videos.
[](https://private.stack360.io/files/debug-1.mkv)
[](https://private.stack360.io/files/debug-2.mkv)
### How to reproduce
_No response_
### Did this work correctly in an earlier version?
No / Don't know
### Operating System
Fedora Linux
### JDK
17
### Apache NetBeans packaging
Apache NetBeans binary zip
### Anything else
_No response_
### Are you willing to submit a pull request?
No
### Code of Conduct
Yes
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273679398
You can assure me? Have you seen my videos? Clearly, it's not working.
I remind you that I have debugged this code with IntelliJ for many years without a problem. So, the difference between these two scenarios is NetBeans.
Also, this is not some wacky test project. This is a large system that has been in production for more than ten years.
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273777489
The test program is at [https://private.stack360.io/files/Test.zip](https://private.stack360.io/files/Test.zip)
In it, there is a file named README.txt that has the instructions.
Thank you!
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273807240
I updated it agin to include the NetBeans project files.
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[GitHub] [netbeans] neilcsmith-net commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
neilcsmith-net commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1279036313
I'm aware of dynamic-loader - it's similar, although simpler, to how PraxisCORE works. Feel free to contact me (company info on my GitHub profile). It _might_ be something I can take a look at.
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1275183172
When I load a new version, I remove all references to the old class. So there is only one loaded at a time.
If memory serves, Groovy has the ability to dynamically compile and load files built-in. For Java, I use [https://github.com/dvare/dynamic-loader](https://github.com/dvare/dynamic-loader)
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273848704
That system also dynamically loads Java. I tested it. The problem exists in Java too. So, this is not a Groovy problem.
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273845561
Exactly. Thank you!
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[GitHub] [netbeans] neilcsmith-net commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
neilcsmith-net commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1274433207
I develop a dynamic reloading system myself, although I've never used the debugger with it - mainly because the dynamic source code doesn't exist in files on disk either.
A question would be how you're doing reload? I haven't looked at your system. But in terms of Java at least do you use HotSwap or dynamic classloaders? Because there could be a 1-to-1 vs 1-to-many mapping between source and class to consider too.
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[GitHub] [netbeans] lkishalmi commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
lkishalmi commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273669724
I can assure you that the dynamic class reloading for debugging is working in Java projects. Just tested, it works with Groovy as well (though I could imagine, that there are limitations)
I have to mention that I've tested this with Gradle projects which probably is the best project type for Groovy support in NetBeans.
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[GitHub] [netbeans] BradWalker commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
BradWalker commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273720467
> If you like, I can create a smallish open-source program to demonstrate the problem.
That would be extremely HELPFUL! My professional experience has taught me a small reproducible test case goes a very long ways to helping with fixing/diagnosing a problem.
Then maybe others, like me, can get more involved.
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1280022307
Incidentally, I noticed that not only does IntelliJ handle this situation correctly, but so does eclipse. So, the only major IDE that doesn't is NetBeans.
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273684721
Also, you can test this with a typical Gradle project because Gradle compiles the code before it gets executed. I'm not doing that, as I've explained.
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[GitHub] [netbeans] lkishalmi commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
lkishalmi commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273837729
I see what you mean! I think so far the debug info loading happened in one direction IDE -> APP, or in the first use IDE <- APP, but after the first IDA <- APP sync the IDE never syncs the debug info back from the APP.
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1278937999
I am interested in funding a project to correct this problem. If interested, please contact me.
Blake McBride
blake1024@gmail.com
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273682895
If you like, I can create a smallish open-source program to demonstrate the problem.
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1273790312
I just updated Test.zip with a few corrections to the README.txt file.
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[GitHub] [netbeans] blakemcbride commented on issue #4754: Debug info not updated when code dynamically re-loaded
Posted by GitBox <gi...@apache.org>.
blakemcbride commented on issue #4754:
URL: https://github.com/apache/netbeans/issues/4754#issuecomment-1280021091
Neil was unable to help me, so this is still an open project.
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