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https://issues.apache.org/jira/browse/POOL-356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16935230#comment-16935230
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M Sazzadul Hoque edited comment on POOL-356 at 9/22/19 7:00 AM:
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IMHO, it doesn't make any sense to {{create()}} within {{destroy(p)}}. For
example, {{clear()}} uses {{destroy(p)}}{{ and it's absurd to create same
number of idle objects again. Even worse, doesn't this lead to an infinite
loop?}}
was (Author: sazzad):
IMHO, it doesn't make any sense to {{create()}} within {{destroy(p)}}. For
example, {{clear()}} uses {{destroy(p)}} {{}} and it's absurd to create same
number of idle objects again. Even worse, doesn't this lead to an infinite
loop?{{}}
> deadlock if borrowObject gets called to fast and maxIdle is 0
> -------------------------------------------------------------
>
> Key: POOL-356
> URL: https://issues.apache.org/jira/browse/POOL-356
> Project: Commons Pool
> Issue Type: Bug
> Affects Versions: 2.6.0
> Reporter: Mark Struberg
> Assignee: Mark Struberg
> Priority: Major
> Fix For: 2.6.1
>
>
> I figured this while creating a unit test for OpenJPA. But also did see this
> in real production with commons-dbcp2. See DBCP-513 for more info.
> See this comment for a precise explanation what happens
> https://issues.apache.org/jira/browse/DBCP-513?focusedCommentId=16660545&page=com.atlassian.jira.plugin.system.issuetabpanels%3Acomment-tabpanel#comment-16660545
> The problem is basically that the logic to immediately destroy a pool object
> does not notify the DeLinkedQueue:
> {code}
> if (isClosed() || maxIdleSave > -1 && maxIdleSave <=
> idleObjects.size()) {
> try {
> destroy(p);
> {code}
> But the borrowObject code is locking on that condition...
> {code}
> if (borrowMaxWaitMillis < 0) {
> p = idleObjects.takeFirst();
> }
> {code}
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