Clustering: scattered cache sampling errors ------------------------------------------- Key: WFLY-12669 URL: https://issues.jboss.org/browse/WFLY-12669 Project: WildFly Issue Type: Bug Components: Clustering Affects Versions: 18.0.0.Final Reporter: Tommasso Borgato Assignee: Paul Ferraro Priority: Blocker Attachments: clusterbench-ee8.ear The issue is about scattered cache replication across cluster nodes; WildFly is started in clustered mode using a scattered cache for replicating HTTP session data across cluster nodes; all 4 nodes in the cluster are initialized with the following {{cli}} script: {noformat} embed-server --server-config=standalone-ha.xml /subsystem=jgroups/channel=ee:write-attribute(name=stack,value=tcp) /subsystem=infinispan/cache-container=web/scattered-cache=testScattered:add() /subsystem=infinispan/cache-container=web:write-attribute(name=default-cache, value=testScattered) {noformat} The test is run with [wildfly-18.​0.0.Final.zip|https://download.jboss.org/wildfly/18.0.0.Final...]; The same tests run with version [wildfly-17.​0.1.Final.zip|https://download.jboss.org/wildfly/17.0.1.Final...] do not have any problem; hence this looks like a regression; As usual, we test that the serial value stored in the scattered cache is incremented at every call: when this is not true, we say we have a *sampling error*; Using MOD_JK as load balancer, we have a *22.46%* of *sampling errors* with wildfly-18.​0.0.Final.zip (0% with wildfly-17.​0.1.Final.zip): - OK [eap-7.x-clustering-http-session-shutdown-scattered with wildfly-17.​0.1.Final.zip|https://eap-qe-jenkins.rhev-ci-vms.eng.rdu2.red...] - ERROR [eap-7.x-clustering-http-session-shutdown-scattered with wildfly-18.​0.0.Final.zip|https://eap-qe-jenkins.rhev-ci-vms.eng.rdu2.red...] Using HAPROXY as load balancer, we have a *1.71%* of *sampling errors* with wildfly-18.​0.0.Final.zip (0% with wildfly-17.​0.1.Final.zip): - OK [eap-7.x-clustering-http-session-shutdown-scattered with wildfly-17.​0.1.Final.zip|https://eap-qe-jenkins.rhev-ci-vms.eng.rdu2.red...] - ERROR [eap-7.x-clustering-http-session-shutdown-scattered with wildfly-18.​0.0.Final.zip|https://eap-qe-jenkins.rhev-ci-vms.eng.rdu2.red...] Using MOD_CLUSTER as load balancer, we have a *1.85%* of *sampling errors* with wildfly-18.​0.0.Final.zip (0% with wildfly-17.​0.1.Final.zip): - OK [eap-7.x-clustering-http-session-shutdown-scattered with wildfly-17.​0.1.Final.zip|https://eap-qe-jenkins.rhev-ci-vms.eng.rdu2.red...] - ERROR [eap-7.x-clustering-http-session-shutdown-scattered with wildfly-18.​0.0.Final.zip|https://eap-qe-jenkins.rhev-ci-vms.eng.rdu2.red...] On the server we deploy, as usual, {{clusterbench}} (see attachment clusterbench-ee8.ear).