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From "Christian Schneider (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ARIES-1430) Blueprint bundle shut down after timeout even if all dependencies are present at that time
Date Sun, 11 Oct 2015 19:06:05 GMT
Christian Schneider created ARIES-1430:
------------------------------------------

             Summary: Blueprint bundle shut down after timeout even if all dependencies are
present at that time
                 Key: ARIES-1430
                 URL: https://issues.apache.org/jira/browse/ARIES-1430
             Project: Aries
          Issue Type: Bug
          Components: Blueprint
    Affects Versions: blueprint-core-1.4.4
            Reporter: Christian Schneider
            Assignee: Christian Schneider
             Fix For: blueprint-core-1.4.5


When I run the jpa blueprint example it works fine at the start but after 4 minutes I see
the exception below.

When the blueprint context is created the future for the timeout of dependencies is canceled.
https://github.com/apache/aries/blob/trunk/blueprint/blueprint-core/src/main/java/org/apache/aries/blueprint/container/BlueprintContainerImpl.java#L379

In Aries JPA I use a ComponentDefinitionRegistryProcessor to scan for the @PersistenceContext
annoations and register a service reference for these. I think that this triggers
the future for the timeout of such dependencies again. If this processor is called after the
future is canceled above then the future will not be canceled anymore. So after the timeout
(5min) it will
trigger and stop the blueprintcontainer even if all dependencies are satisfied now.

This is the code that is executed after the timeout:
https://github.com/apache/aries/blob/trunk/blueprint/blueprint-core/src/main/java/org/apache/aries/blueprint/container/BlueprintContainerImpl.java#L341

It matches the exception and explains why there are no unresolved dependencies.

I would be happy about feedback from anyone with deeper blueprint knowledge. Is what I do
there in Aries JPA incorrect? If yes then we need a new Aries JPA release .. though I am not
sure how to better address the problem.
If it is correct then we need to fix this in blueprint core.
A simple fix/workaround would be to check if there are no unresolved dependencies when the
future times out and not stop the container in this case. A better fix would cancel the future
as soon as all dependencies are fulfilled.


2015-10-11 19:08:43,371 | ERROR | rint Extender: 2 | BlueprintContainerImpl           | 12
- org.apache.aries.blueprint.core - 1.4.4 | Unable to start blueprint container for bundle
net.lr.tasklist.cdi.tasklist-persistence/1.0.0.SNAPSHOT due to unresolved dependencies []
java.util.concurrent.TimeoutException
    at org.apache.aries.blueprint.container.BlueprintContainerImpl$1.run(BlueprintContainerImpl.java:336)[12:org.apache.aries.blueprint.core:1.4.4]
    at org.apache.aries.blueprint.utils.threading.impl.DiscardableRunnable.run(DiscardableRunnable.java:48)[12:org.apache.aries.blueprint.core:1.4.4]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[:1.8.0_60]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)[:1.8.0_60]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)[:1.8.0_60]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)[:1.8.0_60]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)[:1.8.0_60]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)[:1.8.0_60]
    at java.lang.Thread.run(Thread.java:745)[:1.8.0_60] 




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