[jboss-jira] [JBoss JIRA] Reopened: (JBAS-4815) UnifiedInvokerProxyHA - Client instance check and assignment should be atomic

UnifiedInvokerProxyHA - Client instance check and assignment should be atomic ----------------------------------------------------------------------------- Key: JBAS-4815 URL: http://jira.jboss.com/jira/browse/JBAS-4815 Project: JBoss Application Server Issue Type: Bug Security Level: Public(Everyone can see) Components: Clustering, Remoting Affects Versions: JBossAS-4.2.1.GA, JBossAS-5.0.0.Beta2 Reporter: Galder Zamarreno Assigned To: Galder Zamarreno Fix For: JBossAS-5.0.0.CR1 I have realised that UnifiedInvokerProxy/UnifiedInvokerProxyHA maintain a instance reference to the InvokerLocator/Client instances to a specific invocation is using. That is, when a new target is chosen, the unified proxy updates its Client and corresponding InvokerLocator instances (if they've changed), and uses the Cient instance variable to make the call. As far as I can see there's no synchronisation in the usage/assignment of Client or InvokerLocator. Proxies are meant to be thread safe which means that multiple client app threads could be using the same proxy without any problems. I can see all this going wrong the moment someone uses client proxies this way in a clustered environment with round robin load balance policy. We've got no guarantee that round robin will work correctly in these situations. Several solutions have been discussed in