This issue is related to both EAP and mod_cluster. Scenario: - An LB that sits in front of a few EAP nodes(EAP1, EAP2,EAP3, EAP4) - A browser sending multiple requests(possibly concurrent) to EAP1 - EAP1 has an issue and stops responding - LB gets request R1 from browser , and does not recognize the jvmroute(since EAP1 is down) - LB redirects the request to EAP2 - The browser sends another request(R2) still with a jvm route that contains EAP1 - LB looks at R2 sees a faulty route and redirects it to EAP3 - Similar thing happens for R3 which gets sent to EAP4 - EAP2,EAP3,EAP4 all try to lock and own the session and most likely failing causing continuous retries and timeouts
https://bugzilla.redhat.com/show_bug.cgi?id=1366939 https://bugzilla.redhat.com/show_bug.cgi?id=1366754
https://github.com/modcluster/mod_cluster/commit/01cdb9b48c5788c92bf631edf1c288f49ef44c53