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https://issues.apache.org/jira/browse/ARIES-2065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17478825#comment-17478825
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Arthur Naseef commented on ARIES-2065:
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I have written 2 different ways of reliably catching the race condition, with
the second forcing the HashMap's ConcurrentModificationException by modifying
the mapping function passed to {{{}Map.computeIfAbsent(){}}}. I can share this
code if it helps.
A unit test to capture this case should be feasible. However, understanding
the timing of execution of the operation passed to {{fromOsgiRunnable()}}
inside {{splitBy()}} has proven challenging for the time available.
The full stack trace of the ConcurrentModificationException runs through these:
{code:java}
org.apache.aries.component.dsl.internal.ServiceReferenceOSGi$DefaultServiceTrackerCustomizer.addingService
org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding{code}
> ConcurrentModificationException at java.util.HashMap.computeIfAbsent
> --------------------------------------------------------------------
>
> Key: ARIES-2065
> URL: https://issues.apache.org/jira/browse/ARIES-2065
> Project: Aries
> Issue Type: Bug
> Components: Component DSL
> Reporter: Arthur Naseef
> Priority: Major
>
> Using aries-jax-rs-whiteboard with resources from 2 different bundles, I hit
> the following.
> {code:java}
> java.util.ConcurrentModificationException
> at java.base/java.util.HashMap.computeIfAbsent(Unknown Source)
> at org.apache.aries.component.dsl.OSGi.lambda$null$79(OSGi.java:734)
> at
> org.apache.aries.component.dsl.internal.JustOSGiImpl.lambda$new$2(JustOSGiImpl.java:47)
> at
> org.apache.aries.component.dsl.internal.OSGiImpl.run(OSGiImpl.java:50){code}
> Debugging, this was tracked back to {{OSGi.splitBy()}} and it's use of
> {color:#172b4d}HashMap{color}.
> When this happens, the services fail to start up. Since this is a race
> condition, it does not happen every time.
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