[jboss-jira] [JBoss JIRA] (WFLY-6583) Session leak on SmartOS hosts

[Michael Noack (JIRA)]

Michael Noack created WFLY-6583:
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             Summary: Session leak on SmartOS hosts
                 Key: WFLY-6583
                 URL: https://issues.jboss.org/browse/WFLY-6583
             Project: WildFly
          Issue Type: Bug
          Components: Clustering
    Affects Versions: 10.0.0.Final, 9.0.0.Final, 8.2.0.Final
         Environment: CentOS 7 or SmartOS instance using Joyents Infrastructure/Bare metal container.

[root at 979638eb-b45c-45b3-9fdb-d7f48276e4ef /]# java -version
java version "1.8.0_77"
Java(TM) SE Runtime Environment (build 1.8.0_77-b03)
Java HotSpot(TM) 64-Bit Server VM (build 25.77-b03, mixed mode)

[root at 979638eb-b45c-45b3-9fdb-d7f48276e4ef /]# uname -a
Linux 979638eb-b45c-45b3-9fdb-d7f48276e4ef 3.10.0 BrandZ virtual linux x86_64 x86_64 x86_64 GNU/Linux

[root at 979638eb-b45c-45b3-9fdb-d7f48276e4ef /]# cat /etc/issue
\S
Kernel \r on an \m
            Reporter: Michael Noack
            Assignee: Paul Ferraro
            Priority: Minor


When running Wildfly 8.2.0-Final, 9.0.0-Final or 10.0.0-Final in domain mode using the full-ha profile some sessions never get closed when running on SmartOS or a BrandZ kernel on SmartOS. The amount of unclosed sessions rises slowly. I've been keeping track of this issue for almost a year now and handled it by restarting the entire cluster at first.

When registering a HttpSessionListener and logging any sessionCreated(HttpSessionEvent se) and sessionDestroyed(HttpSessionEvent se) one can cleary see some sessions never generate the sessionDestroyed event.

The problem disappears when running the very same setup on a KVM instance of CentOS 6 or 7 (regardless whether the KVM host is SmartOS or Linux).



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