Duplicate com.sun.xml.bind installed screw other plugins

[tkupka]

Describe the bug
Duplicate com.sun.xml.bind installed which prevent other plugins to load Mylyn is good example.

To Reproduce
Install vanilla STS 4.9.0
install Mylyn from eclipse market place and restart
Open Task Repositories view for example
Eclipse still have original plugin com.sun.xml.bind_2.2.0.v201505121915.jar
Install Timekeeper 2 from https://resheim.net/p2/eclipse-timekeeper_beta/ and restart
It will install com.sun.xml.bind_2.3.3.v20201118-1818.jar and now eclipse has both 2.3.3 and 2.2.0 version of the plugin.
Open Task Repositories view is not working as well as Workweek from timekeeper.

The same happens if you install following plugin from Mylyn (http://download.eclipse.org/mylyn/releases/latest)
Mylyn Builds Connector: Hudson/Jenkins 1.17.0.v20200730-1155 org.eclipse.mylyn.hudson.feature.group Eclipse Mylyn
instead of timekeeper

I have tried the same with latest Eclipse and it behaves the same but all both plugins are working well.

Running on
java 15 2020-09-15
Java(TM) SE Runtime Environment (build 15+36-1562)
Java HotSpot(TM) 64-Bit Server VM (build 15+36-1562, mixed mode, sharing)

[martinlippert]

Thanks a lot for including the detailed steps, that helped a lot to reproduce this. Once the installation reaches a certain point, it causes a package-use conflict for the javax.xml.bind package, specifically around the bundle org.eclipse.mylyn.commons.notifications.feed, which causes the bundle to not resolve anymore.

This can also be reproduced using the latest Eclipse SDK and the steps above instead of Spring Tools 4 for Eclipse 4.9.0, even though the problem surfaces differently on the UI. But the package-use conflict in the Mylyn bundle is still happening.

I would suggest to report this against the Mylyn project.

As a workaround, you could install the Spring Dashboard (optional) feature from here:
https://download.springsource.com/snapshot/TOOLS/nightly/e4.18

It installs an old STS3 dashboard, but that feature keeps the right bundle versions around to prevent the package-use conflict from happening. You can even install this into a "broken" install and it should make it work again.

Hope that helps!

[tkupka]

I tried the same steps with eclipse.buildId=4.18.0.I20201202-1800 and it's working well. I can use timekeeper2 and hudson connector.
I have also installed spring STS plugins ( Spring Tool Suite 4 Main Feature 4.9.0.202012132054 org.springframework.boot.ide.main.feature.feature.group Pivotal, Inc.) and no problem so far.

[martinlippert]

@tkupka Ok, sounds good. Should we close the issue then? We could re-open again if anything additional comes up.

[tkupka]

The Mylyn behaves in strange way STS 4.9.0 in STS. I lost my queries from JIRA multiple times. I hope it will be fixed in up-comming rel. in meantime the eclipse.buildId=4.18.0.I20201202-1800 with all STS plugins looks good.
Let's close it

[dominik42]

yep, workaround works.
May it has to be mentioned, that only the Spring Dashboard is needed from https://download.springsource.com/snapshot/TOOLS/nightly/e4.18 ... all other components could left unchecked.