File upload error - ehcache (Roller 4.1, GF 3.1)

Hi


Has anyone seen this error before:

ERROR 2012-10-22 09:28:56,566 DiskStore:get - userCacheCache: Could not read disk store element for key <my-user-id>
net.sf.ehcache.CacheException: userCache Cache: The Disk store is not active.
        at net.sf.ehcache.store.DiskStore.checkActive(DiskStore.java:207)
...

I get it consistently when I'm trying to upload a file (e.g. image) to my blog. Could it be a file permissions problem - it broke a while back but I'm not sure what changed.

I don't know if it's related but I've got this file in /tmp:
-rw-r--r-- 1 oracle oinstall    0 Oct 22 11:02 userCache.data
(it was owned by root so I deleted it and then GF restart recreated it)


This is Roller 4.1 running on GF 3.1 on 32 bit Oracle Linux and with an XE 11.2 database at the backend (yep, I guess I may be the only one running this other than you-know-who).

My roller-custom.properties contains:

openjpa.jdbc.DBDictionary=oracle
hibernate.dialect=org.hibernate.dialect.OracleDialect

# http://web.archiveorange.com/archive/v/PxZtPqJeegB3jnL5hp8o
openjpa.QueryCompilationCache=false


TIA!



Simon
PS. And yes, I do want to upgrade to Roller 5.0.1 but last time I tried a year or so ago I found several bugs in the Oracle-specific parts of the upgrade and still couldn't get it to work. It is on my To Do list to fix though and I'll post details here.