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https://issues.apache.org/jira/browse/POOL-123?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Phil Steitz updated POOL-123:
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Issue Type: Improvement (was: Bug)
Summary: borrowObject from the AbandonedObjectPool hangs on a wait()
method when the WHEN_EXHAUSTED_BLOCK is set (was: borrowObject from the
GenericObjectPool hangs on a wait() method when the WHEN_EXHAUSTED_BLOCK is set)
> borrowObject from the AbandonedObjectPool hangs on a wait() method when the
> WHEN_EXHAUSTED_BLOCK is set
> -------------------------------------------------------------------------------------------------------
>
> Key: POOL-123
> URL: https://issues.apache.org/jira/browse/POOL-123
> Project: Commons Pool
> Issue Type: Improvement
> Affects Versions: 1.4
> Environment: Windows XP, eclipse. JDK 1.6
> Reporter: Meir Shahar
> Priority: Minor
>
> This bug is related to bugs #1, #38 & #102. Thought the bugs are closed, I
> think there is a (edge condition) scenario that is not handled properly:
> Config:
> 10 active connections limit
> RemoveAbandoned set to 'on'
> RemoveAbandonedTimeout set to x (say 60 secs)
> Suppose 10 connections were borrowed and the 11 th request was issued, all
> within a time frame shorted then the timeout.
> The first 10 requests are in methods that do not properly release the
> connection.
> This means that the 11 th thread is waiting indefinitely until a notify is
> sent.
> The 'non releasing' threads the first 10 connections hence no notification is
> sent
> The 'garbage collection' is performed by the calling AbandonedObjectPool
> before calling the GenericObjectPool.borrowObject(...). This garbage
> collection will not be called again and the wait() will stay locked though
> some connections might be come available through timeout expiration.
> The quick n dirty workaround is to setMaxWait(...) but still I think a better
> solution will be along the lines of:
> 1. Waiting for removeAbandonedTimeout secs
> 2. Retry regular allocation
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