[jboss-jira] [JBoss JIRA] Resolved: (JBRULES-2223) ArrayIndexOutOfBoundsException in AbstractRuleBase.getStatefulSessions()

ArrayIndexOutOfBoundsException in AbstractRuleBase.getStatefulSessions() ------------------------------------------------------------------------ Key: JBRULES-2223 URL: https://issues.jboss.org/browse/JBRULES-2223 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Affects Versions: 4.0.7 Reporter: Assen Todorov Assignee: Mark Proctor Priority: Critical The following exception was thrown on a clustered application, based on Terracotta & JBoss Drools (4.0.7). {code} java.lang.ArrayIndexOutOfBoundsException: 0 at org.drools.util.ObjectHashSet.toArray(ObjectHashSet.java:152) at org.drools.common.AbstractRuleBase.getStatefulSessions(AbstractRuleBase.java:724) ....... {code} The code : {code} /** * Creates a new rule base if necesarry. * @param aRuleSet the rule set for the new rule base. * @throws RuleConversionException if the rule engine has a problem with rule set compilation and loading. */ private void createRuleBase(final RuleSet aRuleSet) throws RuleConversionException { Check.notNull(aRuleSet, "aRuleSet"); final String code = aRuleSet.getCode(); Check.notNull(code, "aRuleSet.getCode()"); Check.notEmpty(code, "aRuleSet.getCode()"); final ECRC ecrc = new ECRC(); ecrc.update(code); final long crc = ecrc.getValue(); synchronized(ruleBaseCache) { ruleBase = ruleBaseCache.get(crc); if(ruleBase == null) { ruleBase = loadRuleBaseFromCode(code); ruleBaseCache.put(crc, ruleBase); } else { // rulebase already exist final StatefulSession[] sessions = ruleBase.getStatefulSessions(); if(sessions.length > 0) { // old sessions (working memories exist) for(StatefulSession session: sessions) { // clear the working memory session.dispose(); } } } } } {code} The class where this method is defined, is declared as _instrumented-classes_ in the Terracotta configuration. Hope this helps !