Riddhi Jagdish Patil - tested using 9.0.2 and observed the same bug.

How to test:

• Start IGB 9.1.0
• Reset preferences to defaults
• Clone an IGB App to your local - choose one that is NOT currently available in any default App store parts of IGB 9.1
• Build it.
• Remove or rename the jar file that is created.
• Add the "target" folder as a local App repository
• Observe that the App is shown on the list of Apps available to install
• Click "Install"

If the bug is fixed, the button will not switch to showing the App as installed.
If the bug is still in effect, the button will show the App as installed.

Issue:
App Manager should not lie about whether an App is actually installed

Solution:
Once the resolver.deploy() is done executing, check if the app is installed by checking the installed apps list in BundleContext. If the app is installed show the status as installed else display error message.

Files changed:
plugins/plugin-manager/src/main/java/org/lorainelab/igb/plugin/manager/AppManagerFxPanel.java
plugins/plugin-manager/src/main/java/org/lorainelab/igb/plugin/manager/BundleActionManager.java
plugins/plugin-manager/src/main/java/org/lorainelab/igb/plugin/manager/service/impl/PluginManagerServiceImpl.java

Code changes are present in folowing branch:
https://bitbucket.org/rpatil14/riddhifork-igb/branch/IGBF-2186#diff

Test scenario:
1) Incorrect jar installation:
Start IGB 9.1.0
Reset preferences to defaults
Clone an IGB App to your local - choose one that is NOT currently available in any default App store parts of IGB 9.1
Build it.
Remove or rename the jar file that is created.
Add the "target" folder as a local App repository
Observe that the App is shown on the list of Apps available to install
Click "Install"
Expected output - App should not be installed and error message should be displayed

2) Correct jar installation:
Start IGB 9.1.0
Reset preferences to defaults
Select any repository from Manage Repositories
Observe that the App is shown on the list of Apps available to install
Click "Install"
Expected output - App should be installed and error message should not be displayed

cc. [~aloraine]

To test, I did this:

• Built version 0.0.1 of super-simple-igb-app (from git@bitbucket.org:lorainelab/super-simple-igb-app.git) by running mvn package
• Added "target" from above to IGB as a new App repository
• Observed that super-simple-igb-app appeared as a new option in IGB App Manager
• Removed the jar file for above (to simulate a corrupt or missing jar file)
• Clicked "Install" button in IGB App Manager

I expected to see an error dialog (as in Test scenario 1 above) but instead, IGB hung and I needed to force-quit IGB.

cc: Riddhi Jagdish Patil

Above comment is from installing https://bitbucket.org/rpatil14/riddhifork-igb/downloads/IGBF-2186.dmg

To test, I attempted to install ProtAnnot (available from the BioViz App repository). When I clicked "Install" I observed that IGB again hung – a spinning wheel appeared and never ended.

I am able to get the error message.
Attached test1.png

Can you ask one of the other Mac users to try it out - after installing using the installer from your downloads?
Remind them they should delete their bundles directory before trying to run the IGB from your installer.
Their bundles directory is ~/.igb/bundles

I checked in Prutha's laptop, while installing incorrect jar App Manager hangs. I will check the logs.
For correct jar the app was installed successfully in Mac

cc. [~aloraine]

Closing for now - won't fix.