[jbosstools-issues] [JBoss JIRA] (JBIDE-11929) Project examples freezes during quickfix dialog

[Rob Stryker (JIRA)]

Rob Stryker created JBIDE-11929:
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             Summary: Project examples freezes during quickfix dialog
                 Key: JBIDE-11929
                 URL: https://issues.jboss.org/browse/JBIDE-11929
             Project: Tools (JBoss Tools)
          Issue Type: Bug
          Components: project-examples
    Affects Versions: 3.3.0.CR1
            Reporter: Rob Stryker
            Assignee: Snjezana Peco
             Fix For: 3.3.0.CR1


When importing the dvd seam example project, a list of quickfixes was shown. After trying to fix each one, the UI would freeze for 15-30 seconds. A Jstack revealed the following:

{code}

"main" prio=10 tid=0x00007f35b8009800 nid=0x26e1 in Object.wait() [0x00007f35bd93c000]
   java.lang.Thread.State: TIMED_WAITING (on object monitor)
        at java.lang.Object.wait(Native Method)
        - waiting on <0x00000000fe463e08> (a org.eclipse.core.internal.jobs.Semaphore)
        at org.eclipse.core.internal.jobs.Semaphore.acquire(Semaphore.java:39)
        - locked <0x00000000fe463e08> (a org.eclipse.core.internal.jobs.Semaphore)
        at org.eclipse.core.internal.jobs.JobManager.join(JobManager.java:847)
        at org.eclipse.core.internal.jobs.InternalJob.join(InternalJob.java:380)
        at org.eclipse.core.runtime.jobs.Job.join(Job.java:385)
        at org.jboss.tools.project.examples.dialog.MarkerDialog.okPressed(MarkerDialog.java:237)
{code}

Clearly the UI thread is waiting on a newly scheduled background job, which causes the freeze. The lines in this stacktrace match with lines in trunk. The offending lines of code seem to be this:

{code}
	ProjectExamplesActivator.waitForBuildAndValidation.schedule();
	ProjectExamplesActivator.waitForBuildAndValidation.join();
{code}

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