https://issues.apache.org/bugzilla/show_bug.cgi?id=49170
Summary: Transmission of duplicated session in
DeltaManager#handleGET_ALL_SESSIONS.
Product: Tomcat 7
Version: unspecified
Platform: All
OS/Version: All
Status: NEW
Severity: normal
Priority: P2
Component: Cluster
AssignedTo: [email protected]
ReportedBy: [email protected]
Created an attachment (id=25333)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=25333)
patch against trunk.
Config
<Manager className="org.apache.catalina.ha.session.DeltaManager"
sendAllSessions="false"
sendAllSessionsSize="XXXX" />
DeltaManager#handleGET_ALL_SESSIONS is as follows.
=====
...skip...
if (isSendAllSessions()) {
sendSessions(sender, currentSessions, findSessionTimestamp);
} else {
// send session at blocks
int len = currentSessions.length < getSendAllSessionsSize() ?
currentSessions.length : getSendAllSessionsSize(); Session[]
sendSessions = new Session[len];
for (int i = 0; i < currentSessions.length; i += getSendAllSessionsSize())
{
len = i + getSendAllSessionsSize() > currentSessions.length ?
currentSessions.length - i : getSendAllSessionsSize();
System.arraycopy(currentSessions, i, sendSessions, 0, len);
sendSessions(sender, sendSessions,findSessionTimestamp);
...skip...
}
...skip...
}
=====
sendSessions maintains previous Session.
For instance,
currentSessions=[ssA, ssB, ssC, ssD, ssE]
sendAllSessionsSize=3
loop1 : sendSessions=[ssA, ssB, ssC]
loop2 : sendSessions=[ssD, ssE, ssC]
ssC is transmitted two times.
It should be the following.
loop1 : sendSessions=[ssA, ssB, ssC]
loop2 : sendSessions=[ssD, ssE]
This problem exists in TC5.5, TC6.0, and TC7.0.
I made a patch against trunk.
Best Regards.
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