[ https://issues.jboss.org/browse/DROOLS-890?page=com.atlassian.jira.plugin... ] Thomas Leung commented on DROOLS-890: ------------------------------------- Also, another hint is that we observed it always happened in one of our drl rule which it eval an local function and then this function call another local function. e.g. In test.drl : rule "A" when eval(function1(...)) then ..... end function boolean function1(...) { return function2(...); } function boolean function2(...) { return true; } I reviewed the generated java from this drl and seems like Drools will compile all functions to individual classes and the rule class import static the function1 class and then function1 class will import static the function2 class. Just wonder if this will cause the ClassNotFoundException or not ? Our functions are not likely causing ClassNotFoundException as it just does some string manipulations. -- This message was sent by Atlassian JIRA (v6.4.11#64026)