[jboss-jira] [JBoss JIRA] Resolved: (JBRULES-2904) KnowledgeAgent unsubscribes monitors, doesn't resubscribe them

KnowledgeAgent unsubscribes monitors, doesn't resubscribe them -------------------------------------------------------------- Key: JBRULES-2904 URL: https://issues.jboss.org/browse/JBRULES-2904 Project: Drools Issue Type: Bug Security Level: Public(Everyone can see) Components: drools-core Affects Versions: 5.1.1.FINAL Reporter: Laird Nelson Assignee: Esteban Aliverti Fix For: 5.2.0.M2 A KnowledgeAgent set up to monitor a .drl file, and set to perform incremental builds, will correctly monitor that file for changes. When a change to that file, however, results in a DRL syntax exception (or any other KnowledgeBuilder errors), the KnowledgeAgent no longer monitors the resource for changes. This means that a typo in the file effectively stops the KnowledgeAgent from ever seeing that file again. Consequently, an error in the DRL file requires a restart to whatever server is using the KnowledgeAgent. Esteban and I have found that the error is related to lines 337 and following of KnowledgeAgentImpl.java. Here is a snippet from one of his emails to me: "The problem seems to be related to the lines you mentioned. When a resource is modified, all its knowledgeDefinition->resource are cleared and reconstructed later. I don't see any reason to unsubscribe the listener though. So the call to Set<KnowledgeDefinition> definitions = this.removeResourceMapping(resource, true); should be Set<KnowledgeDefinition> definitions = this.removeResourceMapping(resource, false); "That means: remove all the mappings but don't unsubscribe me (the kagent) as a listener." Further background can be found at http://drools-java-rules-engine.46999.n3.nabble.com/Drools-5-1-What-happe...