[jbosstools-issues] [JBoss JIRA] (JBIDE-18506) Usage plugin sometimes locks JBT/JBDS

[Alexey Kazakov (JIRA)]

    [ https://issues.jboss.org/browse/JBIDE-18506?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13009037#comment-13009037 ] 

Alexey Kazakov commented on JBIDE-18506:
----------------------------------------

OK. It's clear now what causes this lock. When some plugin which register a usage event type in its startup method (it's a recommended way) it's invoking this syncExec() in Usage. If in the same time Eclipse UI invokes the usage tread (asyncExec()) from the earlyStartup method then we can get a deadlock in the synchronized JBossToolsUsageActivator.getDefault().getJBossToolsEclipseEnvironment() method.

I still can't reproduce it but Snjezana's stacktrace is enough to see the problem.

I modified the original Snjezana's PR to make sure the updated screen settings are available in all threads: https://github.com/jbosstools/jbosstools-base/pull/328

> Usage plugin sometimes locks JBT/JBDS
> -------------------------------------
>
>                 Key: JBIDE-18506
>                 URL: https://issues.jboss.org/browse/JBIDE-18506
>             Project: Tools (JBoss Tools)
>          Issue Type: Bug
>          Components: usage
>    Affects Versions: 4.2.0.CR1
>            Reporter: Snjezana Peco
>            Assignee: Alexey Kazakov
>             Fix For: 4.2.0.CR2
>
>         Attachments: usagestacktrace.out
>
>
> JBossToolsUsageActivator initializes settings when starting and calls
> AbstractEclipseEnvironment.initScreenSettings()
> that uses the Display.syncExec method 
> which causes JBT/JBDS to freeze. The issue isn't always reproducible, but it often happens when starting JBDS/JBT in a new workspace.
> While I was testing JBIDE-16379, I reproduced it each time when I started Eclipse 4.4.1/JBT 4.2.0.CR1 in a new workspace.



--
This message was sent by Atlassian JIRA
(v6.3.1#6329)