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From "Kevin Sutter (JIRA)" <>
Subject [jira] Closed: (OPENJPA-115) Bottleneck(s) with using OpenJPA in a Container-managed environment
Date Tue, 31 Jul 2007 19:01:06 GMT


Kevin Sutter closed OPENJPA-115.

> Bottleneck(s) with using OpenJPA in a Container-managed environment
> -------------------------------------------------------------------
>                 Key: OPENJPA-115
>                 URL:
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: kernel
>            Reporter: Kevin Sutter
>            Assignee: Kevin Sutter
>            Priority: Critical
>             Fix For: 0.9.7
> Running some benchmarks against OpenJPA using the Sun Java System (SunOne) application
server. Under load, we're not able to push the cpu to 100%. The culprit seems to be the lock
and synchronization processing within AbstractBrokerFactory.newBroker(..). According to sections
5.9.1 and 5.9.2 in the JPA specification, it looks like OpenJPA is attempting to do too much
management of the created EntityManagers. Within a Container-managed environment, the Container
takes care of the lifecycle of the EntityManagers. So, there does not seem to be a need to
do the findBroker(..) invocation, nor is there a need to keep track of the created EntityManagers
(_brokers) so that they can be closed when the Factory is closed. 
> Once we have verified these changes, there may be others that are needed. But, we have
to get by this bottleneck first before going to the next layer... 
> Kevin

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