webMethods Knowlegebase : Configuration for MemoryStoreEvictionPolicy. (1752135)

Problem

There are statements in "Distributed BigMemory Max Configuration Guide" (http://terracotta.org/documentation/4.0/bigmemorymax/configuration/distributed-configuration#incompatible-configuratio) as follows.

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Incompatible Configuration

For any clustered cache, you must delete, disable, or edit configuration elements in ehcache.xml that are incompatible when clustering with Terracotta. Clustered caches have a <terracotta/> or <terracotta clustered="true"> element.

The following Ehcache configuration attributes or elements should be deleted or disabled:

- Replication-related attributes such as replicateAsynchronously and replicatePuts.

- The attribute MemoryStoreEvictionPolicy must be set to either LFU or LRU. Setting MemoryStoreEvictionPolicy to FIFO causes the error IllegalArgumentException.

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1) The document states either LRU or LFU can be set to MemoryStoreEvictionPolicy but the following error comes up when LFU is set to MemoryStoreEvictionPolicy.

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Warning: Error while creating store asynchronously for Cache: CachePerson

net.sf.ehcache.config.InvalidConfigurationException: There is one error in your

configuration:

* CacheManager configuration: Policy 'LFU' is not a supported memory store eviction policy.

at org.terracotta.modules.ehcache.store.ClusteredStore.validateConfig(ClusteredStore.java:236)

at org.terracotta.modules.ehcache.store.ClusteredStore.<init>(ClusteredStore.java:121)

at org.terracotta.modules.ehcache.store.EnterpriseClusteredStore.<init>(EnterpriseClusteredStore.java:128)

at ......

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2) The document also states "MemoryStoreEvictionPolicy to FIFO causes the error IllegalArgumentException." but actually "net.sf.ehcache.config.InvalidConfigurationException" instead is thrown when FIFO is set to MemoryStoreEvictionPolicy.