Svetoslav Neykov created BROOKLYN-357:
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Summary: $brooklyn:entitySpec entities blocking each other when
resolving DSL
Key: BROOKLYN-357
URL: https://issues.apache.org/jira/browse/BROOKLYN-357
Project: Brooklyn
Issue Type: Bug
Reporter: Svetoslav Neykov
Entities created out of {{$brooklyn:entitySpec}} share their config and DSL
objects in particular, blocking each other when resolving them. One entity not
able to resolve or taking longer than usual will block the rest entities in the
group failing our quorum strategies.
The locking happens in
[{{BrooklynDslDeferredSupplier}}|https://github.com/apache/brooklyn-server/blob/d03f254ba19472e3fb5e0a7260cb07679991684a/camp/camp-brooklyn/src/main/java/org/apache/brooklyn/camp/brooklyn/spi/dsl/BrooklynDslDeferredSupplier.java#L111].
The objects shouldn't store any state as they are shared between entities so
we can remove the locking altogether. An alternative is to clone the objects
but it won't fully solve the problem as the DSL object can still be shared
between entities through the config inheritance hierarchy.
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