LRUPolicy is not loaded

Question

Our web application has caching enabled in a pretty standard way, with the LRUPolicy configured as follows:

    <ObjectCache Enabled="true">
        <Policy Type="LRU" Class="com.tridion.cache.LRUPolicy">
            <Param Name="Size" Value="10000" />
            <Param Name="MemSize" Value="256m" />
        </Policy>
        ...
    </ObjectCache>

For some reason however, the log tells me that the:

17:38:46.642 [WebContainer : 0] INFO  com.tridion.cache.CacheFactory - No policy configured, creating a cache with an empty policy.

In other words: the LRUPolicy is somehow not loaded, and the EmptyPolicy is used instead. As a result, the MemSize and Size parameters are ignored (see Cache list size seems limited to 128 items). I understand that this is the normal behaviour of the EmptyPolicy.

What could be the reason for the LRUPolicy not being loaded? I've checked - and ruled out - the following already:

• Incorrect/malformed cd_storage_conf.xml (double-checked it, it's fine)
• The LRUPolicy class could be missing (checked it, it's in the cd_cache.jar, alongside the EmptyPolicy which is loaded)

What am I missing here?

Answer 1

Quirijn in the caching setups that I've performed I observe that the system always starts with empty policy but immediately loads the LRU policy after.

Can you see if you log files mention anything at all about the LRU policy?

Example logs:

2012-01-27 10:28:19,863 INFO CacheFactory - No policy configured, creating a cache with an empty policy.

2012-01-27 10:28:19,867 INFO LRUPolicy - Creating LRU Policy for region

2012-01-27 10:28:19,867 DEBUG LRUPolicy - Configuring LRU Policy for region

2012-01-27 10:28:19,868 DEBUG LRUPolicy - List size of global LRU Policy = 0