[rules-users] Help : drools implementing

[vista2007]

I want to call rules from session bean. I implement this by calling a utility
callss from the Session bean method. 
That Utility class load the rule file as

 "final Reader source = new
InputStreamReader(BaseRuleImpl.class.getResourceAsStream(rulefile));"

this gives the result as expected. But it throws an exception in the server
as follows,(Server log)

java.lang.Throwable
        at
com.sun.enterprise.loader.EJBClassLoader$SentinelInputStream.<init>(EJBClassLoader.java:1123)
        at
com.sun.enterprise.loader.EJBClassLoader$InternalJarURLConnection.getInputStream(EJBClassLoader.java:1216)
        at java.net.URL.openStream(URL.java:1009)
        at java.lang.ClassLoader.getResourceAsStream(ClassLoader.java:1161)
        at
com.sun.enterprise.loader.EJBClassLoader.getResourceAsStream(EJBClassLoader.java:782)
        at java.lang.Class.getResourceAsStream(Class.java:2030)
        at org.drools.semantics.java.RuleBuilder.<clinit>(Unknown Source)
        at org.drools.compiler.PackageBuilder.addRule(Unknown Source)
        at org.drools.compiler.PackageBuilder.addPackage(Unknown Source)
        at org.drools.compiler.PackageBuilder.addPackageFromDrl(Unknown
Source)
        at
com.argosoftware.rules.impl.BaseRuleImpl.readRule(BaseRuleImpl.java:29)
        at com.argosoftware.rules.impl.RuleImpl.fireRule(RuleImpl.java:54)
        at
com.argosoftware.rules.ejb.session.LogicHandlerBean.ruleHandler(LogicHandlerBean.java:42)

 I think this is because of the IO operation.
Can anybody kindly suggest a solution for this.?

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