Set secure cookie in WildFly-8.2.1:
<session-cookie http-only="false" secure="true"/>
Then, got following error with mod_cluster:
2017-09-28 01:27:10,014 ERROR [org.jboss.modcluster] (UndertowEventHandlerAdapter - 1) MODCLUSTER000042: Error MEM sending STATUS command to <IP>:<port>,
configuration will be reset: MEM: Can't read node 2017-09-28 01:27:20,023
ERROR [org.wildfly.mod_cluster.undertow.UndertowEventHandlerAdapter] (UndertowEventHandlerAdapter - 1) null: java.lang.NullPointerException at
org.jboss.modcluster.mcmp.impl.DefaultMCMPRequestFactory.createConfigRequest(DefaultMCMPRequestFactory.java:128)
at org.jboss.modcluster.mcmp.impl.ResetRequestSourceImpl.getResetRequests(ResetRequestSourceImpl.java:89)
at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:384) at org.jboss.modcluster.mcmp.impl.DefaultMCMPHandler.status(DefaultMCMPHandler.java:350)
at org.jboss.modcluster.ModClusterService.status(ModClusterService.java:458) at org.wildfly.mod_cluster.undertow.UndertowEventHandlerAdapter.run(UndertowEventHandlerAdapter.java:160)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [rt.jar:1.8.0_121] at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) [rt.jar:1.8.0_121]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) [rt.jar:1.8.0_121]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) [rt.jar:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [rt.jar:1.8.0_121]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [rt.jar:1.8.0_121] at java.lang.Thread.run(Thread.java:745) [rt.jar:1.8.0_121]
There is no issue with mod_jk when secure cookie is enabled. No mod_cluster error if secure cookie is false.
