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Posted to dev@commons.apache.org by Marc Jambert <ma...@vegatechnologies.fr> on 2004/08/06 10:23:27 UTC

[Collections] PB with LRUMap serialization

Hi all

I have met a strange problem while serializing/deserializing LRUMaps.

I am performing the following operations in my code:
1) If serialized file exists, deserialize LRUMap
2) Fill LRUMap
3) Serialize LRUMap to file

I run my program several times, and the memory is growing over and over
at each run ! After 10 runs the deserialization of a file of 1850 bytes
ends up in taking 300megs in memory. The strange thing is that :

* The number of entries is the same each time
* The size of the file cache on disk is always the same (though the file
is modified)

I replaced the LRUMap with a classical HashMap and do not have any
memory problem.

Any clue ? Is there some kind of memory leak ? 

Thanks!


-- 
o----------------------------------o
|           Marc Jambert           |
| marc.jambert@vegatechnologies.fr |
|                                  |
|       (tel) 05-67-77-19-72       |
|       (fax) 05-67-77-19-98       |
o----------------------------------o
|        Vega Technologies         |
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Re: [Collections] PB with LRUMap serialization

Posted by Stephen Colebourne <sc...@btopenworld.com>.
Can you supply a test case demonstrating the problem
please ;-) The serialization aspects were new in
collections 3.1 so may have an odd bug.

Stephen

 --- Marc Jambert <ma...@vegatechnologies.fr>
wrote: 
> Hi all
> 
> I have met a strange problem while
> serializing/deserializing LRUMaps.
> 
> I am performing the following operations in my code:
> 1) If serialized file exists, deserialize LRUMap
> 2) Fill LRUMap
> 3) Serialize LRUMap to file
> 
> I run my program several times, and the memory is
> growing over and over
> at each run ! After 10 runs the deserialization of a
> file of 1850 bytes
> ends up in taking 300megs in memory. The strange
> thing is that :
> 
> * The number of entries is the same each time
> * The size of the file cache on disk is always the
> same (though the file
> is modified)
> 
> I replaced the LRUMap with a classical HashMap and
> do not have any
> memory problem.
> 
> Any clue ? Is there some kind of memory leak ? 
> 
> Thanks!
> 
> 
> -- 
> o----------------------------------o
> |           Marc Jambert           |
> | marc.jambert@vegatechnologies.fr |
> |                                  |
> |       (tel) 05-67-77-19-72       |
> |       (fax) 05-67-77-19-98       |
> o----------------------------------o
> |        Vega Technologies         |
> o----------------------------------o
> 
> 
>
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> To unsubscribe, e-mail:
> commons-dev-unsubscribe@jakarta.apache.org
> For additional commands, e-mail:
> commons-dev-help@jakarta.apache.org
> 
>  

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