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SCM ignores our plugin after upgrade to 4.0.5 from

Mike Philpot (324) | asked Mar 04 '15, 3:25 p.m.
edited Mar 05 '15, 4:57 a.m. by Ralph Schoon (62.3k33643)
We have a plugin under scmtools/eclipse/plugin that extends scm. It was working fine before we upgraded our RTC eclipse client to v4.0.5. Now scm does not "see" the plugin and does not load it.

 'scm -clean -v' with RTC v4.0.0.1 shows our plugin as loaded and the list of subcommands it adds.

The same command with v4.0.5 returns only the standard plugins that are loaded with the default deployment. Our plugin is ignored and is not listed in the output of loaded plugins.

Can anyone think of anything we are missing or might have misconfigured. In the past, we've occasionally encountered minor issues with changes to the JAVA API that necessitated changes to our plugin, but it has never failed to load before. I can't imagine that our plugin is now incompatible going from to 4.0.5.

Even running with the -debug -consoleLog flags gives no useful clues. Our plugin does not show up at all in that output either; so, I am leaning toward some config problem. Is there some new config file or setting(s) that 4.0.5 needs for plugins that does not?


5 answers

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Evan Hughes (2.4k1318) | answered Mar 05 '15, 10:42 a.m.
edited Mar 09 '15, 9:30 a.m.
I've had success checking to see why a bundle didn't load using the OSGi console. The CLI makes that hard, since it eats the stdin, but you can tell OSGi to provide a console on a port by adding 'osgi.console=9999 ' to configuration/config.ini

After doing that:
  1. run scm daemon start to start a long-lived subcommand. You should get output on the stdout of the CLI saying something like Listening on port 9999 ...
  2. Telnet to port 9999.
  3. Run 'ss' to get a listing of bundles. Search for your bundle (using your terminal emulator's search command) and note the number in the left-most column. 
  4. Now type 'diag your-bundle-number'. OSGi should tell you which bundles failed to resolve.

kanjbala jawahar commented Mar 06 '15, 12:47 a.m.

We are novice here Evan. So please give more details on how to go about doing what you are suggesting.
What cmd. to run from where, things like that.


Evan Hughes commented Mar 09 '15, 9:30 a.m. | edited Mar 09 '15, 9:31 a.m.

I've edited the answer to be more explicit. Does it provide enough information?

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sam detweiler (12.5k6191201) | answered Mar 04 '15, 11:52 p.m.
if you look at your plugin build, META.INF, are the dependencies marked with specific versions?
If so, this can cause your plugin to not load, silently.

Mike Philpot commented Mar 05 '15, 6:27 a.m.

Thanks for the suggestion.

Here are a few of the lines with versions from the META-INF/MANIFEST.MF file:

   Bundle-Version: 2.0.0.qualifier

   Require-Bundle: org.eclipse.core.runtime;bundle-version="3.5.0",;bundle-version="2.1.0",;bundle-version="2.1.0",;bundle-version="1.1.0",;bundle-version="1.1.0",
    <snip additional similar lines>

Can't list them all because of the character limit for comments, but you get the idea...

This plugin is a few years old. It has been modified over time to work with changes in the JAVA API, but has never failed to load before. To my knowledge, we have not modified these versions. I assumed they were just minimum thresholds, not exact version requirements. Am I wrong?

Ralph Schoon commented Mar 05 '15, 6:32 a.m. | edited Mar 05 '15, 6:32 a.m.

I'd suggest to check in the pulgin.xml and to make sure that this is the minimal version and not the specific version - or remove the versions altogether. This makes sure that the version numbers don't mismatch.
By default it is the minimal version, which should be fine. Check just in case.

Mike Philpot commented Mar 05 '15, 7:30 a.m.

Thanks. Just double checked the plugin.xml. I don't see anything that should override the default. This is the only line that I guess could affect it:
<?eclipse version="3.4"?>
But as this has been there and working across all the different versions until now, I didn't think it was a problem.
I think I'm just going to rebuild the plugin with a later version of the client and see where that gets me.

Is there a way to force scm to tell me why it is ignoring the plugin. (i.e. is there anything logged or some debug/tracing I can enable to see the logic it is using.) The -debug flag with the scm command didn't show anything, but maybe there's more info somewhere else?

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Ralph Schoon (62.3k33643) | answered Mar 05 '15, 4:56 a.m.
Has the plugin been deployed to the new version of the SCM tools?

As far as I am aware there have been no drastic changes to the API and if there were, you should see errors in the log files and not nothing.

Mike Philpot commented Mar 05 '15, 6:08 a.m.

Yeah, I agree that this is not related to the API. This is a problem with loading the plugin. It is some kind of config problem. We've got the plugin in the scmtools/eclipse/plugins directory like normal. But for whatever reason it is not being loaded at all. We are stumped at the moment.

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kanjbala jawahar (601815) | answered Mar 06 '15, 1:07 a.m.
So, to Ralph, Sam and others:
(I work with Mike Phllpot and am working on this issue with him.)

1. This is an API issue, albeit internal API (more on this below).
2. We have extended SCM and a vast amount of interfaces have been changed between to 4.0.5.
Our plugin extends the extension point and all of those packages/interfaces have been moved around (changed a lot) in 4.0.5.
We are extending, so we have no choice but to use internal APIs.

Having said that, can RTC folks/experts help us get out of this hole?

I went through the packages and decided that the extension point would now be:

I don't know if that is correct though, based on what I went over that seemed to be the right way to go.
After that I reduced the size of my code to bare minimum and fixed the compilation errors and exported the jar to the <RTC-Cliet-dir>/jazz/scmtools/eclipse location (eclipse automatically puts it under plugins).
Next I ran "scm -clean" followed by "scm -v" but I don't see my bundle.

What I should see is something like this: (showing what I see in

C:\RTC-Client-Win-\jazz\scmtools\eclipse>scm -v
Build Id: RTC-I20120911-1740, version 3.1.100.v20120817_2130
  Subcommands: load login logout create create/workspace create/baseline create/changeset create/snapshot
<removed some stuff>, version 3.1.100.v20120817_2130
  Subcommands: tools.verify tools.validate tools.echo.stdin tools.metronome tools.pkgtest tools.configvalue tools.log, version 3.1.100.v20120822_0505
  Subcommands: help version daemon daemon/start daemon/stop daemon/deregister daemon/register, version 2.0.0.kishore_final3 <<===== My plugin extension.
  Subcommands: mrbuild mrbuild/approveworkitem mrbuild/comparesnapshots mrbuild/createsnapshot mrbuild/extractsnapshots mrbuild/mapsnapshots <removed more stuff>


Thanks in advance for your help.

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kanjbala jawahar (601815) | answered Mar 06 '15, 3:01 p.m.
So we finally figured it out.
I will add more for others here later, but for now:
--the extension point that I replaced with is correct and is working now.

The underlying API was changed vastly and moved around into different packages/interfaces.
But since we are hooking into the subcommand interfaces we have to pay this price until we move on to a more reliable solution.

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