https://issues.apache.org/bugzilla/show_bug.cgi?id=49150
Summary: All primary sessions are deleted at
BackupManager#stopInternal.
Product: Tomcat 7
Version: unspecified
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Cluster
AssignedTo: [email protected]
ReportedBy: [email protected]
BackupManager#stopInternal is as follows.
=====
protected synchronized void stopInternal() throws LifecycleException {
super.stopInternal();
LazyReplicatedMap map = (LazyReplicatedMap)sessions;
if ( map!=null ) {
map.breakdown();
}
cluster.removeManager(this);
}
=====
In Tomcat 7.0.0 RC1, super#stopInternal() is called first.
In StandardManager#stopInternal() of the super class,
The session is stored, and expire all active sessions.
Storing session is unnecessary in BackupManager.
and
When the session expired, the session is deleted from all cluster nodes.
As a Result,
All primary sessions (of own node has) are deleted from all cluster nodes.
For instance,
Node1 : sessionA(primary), sessionB(proxy), sessionC(backup)
Node2 : sessionA(backup), sessionB(primary), sessionC(proxy)
Node3 : sessionA(proxy), sessionB(backup), sessionC(primary)
If Node1 is stopped, it becomes the following.
Node1 : stopped
Node2 : sessionB(primary), sessionC(backup)
Node3 : sessionB(backup), sessionC(primary)
sessionA is expired.
It should be the following.
Node1 : stopped
Node2 : sessionA(primary), sessionB(primary), sessionC(backup)
Node3 : sessionA(backup), sessionB(backup), sessionC(primary)
There is no problem in Tomcat6.0.x,
because it executes super.stop() after LazyReplicatedMap#breakdown() .
I made a patch against trunk.
Best Regards.
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