Call to any of javax.ejb.Timer methods yeilds
'java.lang.IllegalStateException: Cannot obtain inMethodFlag for: Timer.<methodName>'.
Temporary solution: put
org.jboss.ejb.
AllowedOperationsAssociation
.pushInMethodFlag(AllowedOperationsAssociation.IN_BUSINESS_METHOD);
in the beginning of each business method and
org.jboss.ejb.
AllowedOperationsAssociation
.popInMethodFlag();
at end(before 'return' in getter or '}' in setter).