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https://issues.apache.org/jira/browse/AMBARI-11394?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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John Speidel resolved AMBARI-11394.
-----------------------------------
Resolution: Fixed
merged to trunk
> Blueprint cluster provision occasionally fails due to out of order database
> writes
> ----------------------------------------------------------------------------------
>
> Key: AMBARI-11394
> URL: https://issues.apache.org/jira/browse/AMBARI-11394
> Project: Ambari
> Issue Type: Bug
> Affects Versions: 2.1.0
> Reporter: John Speidel
> Assignee: John Speidel
> Fix For: 2.1.0
>
>
> Provisioning a cluster may occasionally fail to complete as a result of an
> out of order database write.
> This error presents itself as start task(s) that never progresses beyond the
> PENDING state. For these logical pending tasks, there are no associated
> physical tasks.
> When a host is matched to a host request, an install request is submitted
> followed immediately by a start request. The install task transitions all
> host components desired_state for the host from INIT to INSTALLED. But,
> because of an error in the persistence layer, after the desired_state is set
> to INSTALLED, it is overwritten on another thread (heartbeat handler thread)
> to INIT. As a result, the component is never started because it it's desired
> state is INIT and isn't processed by the start operation.
> The root cause of this is that the public method
> ServiceComponentHostImpl.handleEvent() is annotated with '@Transactional'.
> Inside of this method the proper locks are acquired, BUT because this method
> is marked as @Transactional it's invocation is wrapped in a proxy which wraps
> the method invocation in a transaction. As a result, the transaction is
> committed in the proxy after the method returns outside of any
> synchronization which allows for out of order writes.
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