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The 'stateProvider' refers to a custom SPStateManager implementation and is used for filters and RACS coordinating with the filters persisting the current user request state, RACS validating it and persisting the current security context state and filters getting the information about the context. Filters and RACS use a 'RelayState' token to work with the current request state. RACS persists the security context and the filters retrieve and validate it using the cookie which RACS also sets to point to this security context.

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For example, by default, the EhCache provider will overflow the data to the system temp directory and will not persist the data across restarts. The following EhCache default configuration can be used to change it:

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<ehcache xsi:noNamespaceSchemaLocation="ehcache.xsd" updateCheck="false" monitoring="autodetect" dynamicConfig="true">

    <diskStore path="/home/username/work/ehcache"/>

    <defaultCache
            maxEntriesLocalHeap="5000"
            timeToIdleSeconds="3600"
            timeToLiveSeconds="3600"
            overflowToDisk="true"
            maxElementsOnDisk="10000000"
            diskPersistent="true"
            diskExpiryThreadIntervalSeconds="120"
            memoryStoreEvictionPolicy="LRU"
            />
</ehcache>

seen here. To change the default configuration, simply copy this file to a custom location and make whatever changes are required. Assuming this configuration is saved in WEB-INF/ehcache.xml, the EhCache provider can be configured as follows:

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