Clustering: replicated-cache sampling errors -------------------------------------------- Key: WFLY-12718 URL: https://issues.jboss.org/browse/WFLY-12718 Project: WildFly Issue Type: Bug Components: Clustering Affects Versions: 18.0.0.Final Reporter: Tommasso Borgato Assignee: Paul Ferraro Priority: Blocker The issue is about replicated-cache in fail-over tests. WildFly is started in clustered mode using a replicated 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/replicated-cache=testRepl:add() /subsystem=infinispan/cache-container=web/replicated-cache=testRepl/component=locking:write-attribute(name=isolation, value=REPEATABLE_READ) /subsystem=infinispan/cache-container=web/replicated-cache=testRepl/component=transaction:write-attribute(name=mode, value=BATCH) /subsystem=infinispan/cache-container=web/replicated-cache=testRepl/store=file:add() /subsystem=infinispan/cache-container=web:write-attribute(name=default-cache, value=testRepl) {noformat} The test is run with wildfly-18.​0.0.Final.zip; The same tests run with version wildfly-17.​0.1.Final.zip do not have any problem; hence this looks like a regression; As usual, we test that the serial value stored in the replicated cache is incremented at every call: when this is not true, we say we have a sampling error; Here are the runs that exhibit this issue: - **22.82% Fail Rate with WildFly-18 ** [eap-7.x-clustering-http-session-shutdown-repl#23|https://eap-qe-jenkins.r...] - **0% Fail Rate with WildFly-17 ** [eap-7.x-clustering-http-session-shutdown-repl#24|https://eap-qe-jenkins.r...] We also repeated the tests to make sure it can be reproduced: - **22.75% Fail rate with WildFly-18 ** [eap-7.x-clustering-http-session-shutdown-repl#26|https://eap-qe-jenkins.r...] - **0% Fail Rate with WildFly-17 ** [eap-7.x-clustering-http-session-shutdown-repl#25|https://eap-qe-jenkins.r...]