Apache Modcluster failed to drain active sessions

Question

I'm am using JBoss EAP 6.2 as Webapplication server and Apace Modcluster for load balancing.

Whenever I try to undeploy my webapplication, I get the following warning

14:22:16,318 WARN  [org.jboss.modcluster] (ServerService Thread Pool -- 136) MODCLUSTER000025: Failed to drain 2 remaining active sessions from default-host:/starrassist within 10.000000.1 seconds
14:22:16,319 INFO  [org.jboss.modcluster] (ServerService Thread Pool -- 136) MODCLUSTER000021: All pending requests drained from default-host:/starrassist in 10.002000.1 seconds

and it takes forever to undeploy and the EAP server-group and node in which the application is deployed becomes unresponsive.

The only workaround is to restart the entire EAP server. My Question is, Is there an attribute that I can set in EAP or ModCluster so that the active sessions beyond a maxTimeOut would expire itself?

Answer 1

To control the timeout to stop a context you can use the following configuration value:

Stop Context Timeout

The amount of time, measure in units specified by stopContextTimeoutUnit, for which to wait for clean shutdown of a context (completion of pending requests for a distributable context; or destruction/expiration of active sessions for a non-distributable context).

CLI Command:

/profile=full-ha/subsystem=modcluster/mod-cluster-config=configuration/:write-attribute(name=stop-context-timeout,value=10)

Ref: Configure the mod_cluster Subsystem

Likewise if you are using JDK 8 take a look at this issue: Draining pending requests fails with Oracle JDK8