Alfresco (Cluster) NoClassFoundException EHcache failed

[finner]

Hi,
I get

.NoClassDefFoundError: edu/emory/mathcs/backport/java/util/concurrent/Executors

as, what seems to be the root cause of an EHCache Configuration Failed when I try to deploy to a clustered environment. I renamed the ehcache-custom.xml and index-tracking-custom.xml as described in the Wiki. I didn't make any changes to the content of these files.

Has anyone stumbled across this before ?
Cheers
Finner

[finner]

Hi,
Found out what was up.
My WAR had ehcache-1.3.0.jar I replaced it with ehcache-1.2.4.jar

Finner

[yulimin]

You should add backport-util-concurrent-3.0.jar to WEB-INF\lib directory in your web application or in the .war file