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https://issues.apache.org/jira/browse/DERBY-1228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Matrigali updated DERBY-1228:
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Does anyone know if there is an issue with how jdbc drivers get booted in 
different classloaders?  

> Make it possible to run multiple instances of Derby within the same VM
> ----------------------------------------------------------------------
>
>                 Key: DERBY-1228
>                 URL: https://issues.apache.org/jira/browse/DERBY-1228
>             Project: Derby
>          Issue Type: New Feature
>          Components: Services
>            Reporter: David Van Couvering
>
> Make it possible to run multiple instances of Derby within the same VM, each 
> with its own derby.system.home, separate configuration parameters, and even 
> different versions of Derby jar files. I haven't looked at this carefully, 
> but at first glance I think this would require (a) refactoring Derby code to 
> get all configuration from a configuration API rather than directly from 
> system properties (b) write a configuration API/class that supports a 
> properties file as well as system properties (in the future this class could 
> also work with JMX) (c) the ability to specify the derby.system.home and a 
> classpath as a DataSource property (d) a Derby classloader that loads Derby 
> jar files from the classpath specified on the DataSource

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