Ehcache.Cache.put does not works with a specific ColdFusion element (and takes about 4 seconds)

Question

I'm using ColdFusion 9 with Ehcache

Ehcache was working pretty well but since I re-installed my machine Ehcache.Cache.put refuse to work on a specific element but is working on tons of other elements.

Cache.put throws no exception and takes about 4 seconds to return. The element I try to put in cache is a ColdFusion component and is only about 7ko. I don't use serialization.

The cache configuration is:

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
         xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
         maxBytesLocalHeap="300m">
         
<sizeOfPolicy maxDepth="99999999" maxDepthExceededBehavior="continue"/>

<defaultCache 
    eternal="false" 
    timeToIdleSeconds="300" 
    timeToLiveSeconds="1200" 
    overflowToDisk="false"
    statistics="true">

I changed it to

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    xsi:noNamespaceSchemaLocation="http://ehcache.org/ehcache.xsd"
    maxEntriesLocalHeap="900">

<defaultCache 
    eternal="false" 
    timeToIdleSeconds="300" 
    timeToLiveSeconds="1200" 
    overflowToDisk="false"
    statistics="true"
    maxEntriesLocalHeap="100"> 

And this works! Changing from a maxBytesLocalHeap to a maxEntriesLocalHeap config makes the difference! I think maybe the internal size calculation is not working. Using maxEntriesLocalHeap do not require size calculation that's why it works with the new configuration.

So why:

1. is Cache.put not working with maxBytesLocalHeap on only one specific element?
2. no exception?
3. Cache.put function takes 4 seconds?
4. this problem on a brand new machine re-installation?

If you have any clue, please let me know. I really need to switch back to maxBytesLocalHeap.

PS:

• The application also uses JDK 1.6, MachII, Hibernate and ColdSpring

Answer 1

Ehcache sizing of a ColdFusion element go too deep and process every Java underlying objects like ColdFusion frameworks objets, etc...

I fixed my issue by setting a filter. I use the system property net.sf.ehcache.sizeof.filter which points to text file location containing FQCN or fields for the sizing engine to ignore. Source: http://forums.terracotta.org/forums/posts/list/6371.page

I set net.sf.ehcache.sizeof.filter by starting Java VM with -D argument like that:

-D net.sf.ehcache.sizeof.filter=/My/Path/To/File.config

My filter configuration file contains:

coldfusion.runtime.NeoPageContext
coldfusion.runtime.CfJspPage
coldfusion.monitor.memory.MemoryTrackable
coldfusion.monitor.sql.QueryStat
coldfusion.monitor.memory.MemoryTrackerProxy
javax.servlet.ServletContext