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https://issues.apache.org/jira/browse/POOL-283?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14307637#comment-14307637
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Valentin Mayamsin edited comment on POOL-283 at 2/5/15 5:50 PM:
----------------------------------------------------------------
I resolved this issue in my project by switching to 1.6, it doesn't have this
issue since it's implemented differently. For 2.x let me suggest wrapping
objects into a wrapper similar to this (pseudo-code):
{code}
class IdentityWrapper {
Object obj;
IdentityWrapper(Object obj) {
this.obj=obj;
}
boolean equals(Object that) {
return that==obj;
}
int hashCode() {
return System.identityHashcode(obj);
}
}
{code}
The drawback is it will create extra object for each returnObject(Object obj)
call. I'm not sure how significant is it.
was (Author: yavalek):
I resolved this issue in my project by switching to 1.6, it doesn't have this
issue since it's implemented differently. For 2.x let me suggest wrapping
objects into a wrapper similar this (pseudo-code):
{code}
class IdentityWrapper {
Object obj;
IdentityWrapper(Object obj) {
this.obj=obj;
}
boolean equals(Object that) {
return that==obj;
}
int hashCode() {
return System.identityHashcode(obj);
}
}
{code}
The drawback is it will create extra object for each returnObject(Object obj)
call. I'm not sure how significant is it.
> 'Object has already been retured to this pool or is invalid' for collections
> ----------------------------------------------------------------------------
>
> Key: POOL-283
> URL: https://issues.apache.org/jira/browse/POOL-283
> Project: Commons Pool
> Issue Type: Bug
> Affects Versions: 2.2
> Reporter: Valentin Mayamsin
>
> This test throws exception:
> {code}
> GenericObjectPoolConfig config = new GenericObjectPoolConfig ();
> config.setMaxTotal ( 2 );
> GenericObjectPool<Set> setsPool = new GenericObjectPool<> ( new
> BasePooledObjectFactory<Set> ()
> {
> @Override
> public Set create () throws Exception
> {
> return new HashSet();
> }
> @Override
> public PooledObject<Set> wrap ( Set o )
> {
> return new DefaultPooledObject<> ( o );
> }
> @Override
> public void passivateObject ( PooledObject<Set> p ) throws
> Exception
> {
> p.getObject ().clear ();
> super.passivateObject ( p );
> }
> }, config );
> final Set set1 = setsPool.borrowObject ();
> final Set set2 = setsPool.borrowObject ();
> setsPool.returnObject ( set1 );
> setsPool.returnObject ( set2 ); // this throws
> java.lang.IllegalStateException: Object has already been retured to this pool
> or is invalid
> {code}
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