ehcache warning message " No configuration found"

Question

I have got following warning when the application start up.

2009-05-13 09:19:41,171 WARN  net.sf.ehcache.config.Configurator - No configuration found. Configuring ehcache from ehcache-failsafe.xml found in the classpath:jar:file:/app/java/lib/ehcache-1.1.jar!/ehcache-failsafe.xml  

I found encache code in following url .. ConfigurationFactory Code

Application is trying to load ehcache.xml but could not find the file so then it loads ehcache-failsafe.xml.I would like to know does this cause any problem to application ? what is impact loading ehcache-failsafe.xml ?

Answer 1

ehcache.xml should be introduced in your classpath and specifically in WEB-INF/classes/. Then, you can specify your needs in it according to your environment.

This is an example:

<?xml version="1.0" encoding="UTF-8"?>

<ehcache>
    <diskStore path="java.io.tmpdir"/>

    <cache name="org.hibernate.cache.UpdateTimestampsCache"
           maxElementsInMemory="50000"
           eternal="true"
           overflowToDisk="true"/>

    <cache name="org.hibernate.cache.StandardQueryCache"
           maxElementsInMemory="50000"
           eternal="false"
           timeToIdleSeconds="120"
           timeToLiveSeconds="120"
           overflowToDisk="true"
           diskPersistent="false"
               diskExpiryThreadIntervalSeconds="120"
           memoryStoreEvictionPolicy="LRU"
            />

    <defaultCache
            maxElementsInMemory="50000"
            eternal="false"
            timeToIdleSeconds="120"
            timeToLiveSeconds="120"
            overflowToDisk="true"
            diskPersistent="false"
            diskExpiryThreadIntervalSeconds="120"
            memoryStoreEvictionPolicy="LRU"
            />

</ehcache>

After 3 years, hope that my response can help others.

Answer 2

Loading ehcache-failsafe.xml doesn't cause a problem per se; however it most likely isn't optimal for your application.

There's no way for EhCache developers to know what you intend to cache; thus ehcache-failsafe.xml included in distribution attempts to provide some "lowest common denominator" settings that would work more or less OK in most cases. You get a warning as a reminder to specify configuration that would be more appropriate for your specific needs.