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[p2-dev] Problems with boostrap installs, mysterious missing jars, and checkCertificates errors.

p2,

Our product upgrade process consists of using the p2 director to
tear down an existing install and then install the new version of
our root IU.

Recently I've started seeing the following failure during the
install process:
~~~
!ENTRY org.eclipse.equinox.p2.engine 4 4 2012-10-27 12:16:57.109
!MESSAGE An error occurred during the org.eclipse.equinox.internal.p2.engine.phases.CheckTrust phase.
!SUBENTRY 1 org.eclipse.equinox.p2.engine 4 0 2012-10-27 12:16:57.109
!MESSAGE session context was:(profile=SGXXProfile, phase=org.eclipse.equinox.internal.p2.engine.phases.CheckTrust, operand=, action=).
!SUBENTRY 1 org.eclipse.equinox.p2.engine 4 0 2012-10-27 12:16:57.109
!MESSAGE Error reading signed content.
!STACK 0
java.io.IOException: The file "C:\Users\carloso\MentorGraphics\Support\CB-1602\install03\eclipse\plugins\gnu.io.rxtx_2.1.7.4_v20071016.jar" does not exist
	at org.eclipse.osgi.baseadaptor.bundlefile.ZipBundleFile.<init>(ZipBundleFile.java:61)
	at org.eclipse.osgi.baseadaptor.bundlefile.ZipBundleFile.<init>(ZipBundleFile.java:55)
	at org.eclipse.osgi.internal.signedcontent.SignedBundleHook.getSignedContent(SignedBundleHook.java:253)
	at org.eclipse.equinox.internal.p2.engine.phases.CertificateChecker.checkCertificates(CertificateChecker.java:73)
	at org.eclipse.equinox.internal.p2.engine.phases.CertificateChecker.start(CertificateChecker.java:54)
	at org.eclipse.equinox.internal.p2.engine.phases.CheckTrust.completePhase(CheckTrust.java:50)
	at org.eclipse.equinox.internal.p2.engine.Phase.postPerform(Phase.java:241)
	at org.eclipse.equinox.internal.p2.engine.Phase.perform(Phase.java:98)
	at org.eclipse.equinox.internal.p2.engine.PhaseSet.perform(PhaseSet.java:47)
	at org.eclipse.equinox.internal.p2.engine.Engine.perform(Engine.java:75)
	at org.eclipse.equinox.internal.p2.engine.Engine.perform(Engine.java:44)
	at org.eclipse.equinox.internal.provisional.p2.director.PlanExecutionHelper.executePlan(PlanExecutionHelper.java:41)
	at org.eclipse.equinox.internal.provisional.p2.director.PlanExecutionHelper.executePlan(PlanExecutionHelper.java:23)
	at org.eclipse.equinox.internal.p2.director.app.DirectorApplication.executePlan(DirectorApplication.java:767)
	at org.eclipse.equinox.internal.p2.director.app.DirectorApplication.planAndExecute(DirectorApplication.java:760)
	at org.eclipse.equinox.internal.p2.director.app.DirectorApplication.performProvisioningActions(DirectorApplication.java:747)
	at org.eclipse.equinox.internal.p2.director.app.DirectorApplication.run(DirectorApplication.java:1040)
	at org.eclipse.equinox.internal.p2.director.app.DirectorApplication.start(DirectorApplication.java:1222)
	at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
	at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
	at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
	at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
	at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
	at org.eclipse.equinox.launcher.Main.main(Main.java:1414)
~~~

It's true, the file's not there, but that's because
it seems like p2 didn't install it and we got to 
running checkCertificates on a file that wasn't yet
installed. We're using platform 3.8.1.

I've seen this issue before and it appears to be a race,
and depending on the OS it might not reproduce.

Has anyone else seen something like this?

Any pointers on where to start digging?

Cheers,
Carlos.
-- 
Carlos O'Donell
Mentor Graphics / CodeSourcery
carlos_odonell@xxxxxxxxxx
carlos@xxxxxxxxxxxxxxxx
+1 (613) 963 1026