Bug 63441 - Changes made to newly created session not replicated
Summary: Changes made to newly created session not replicated
Alias: None
Product: Tomcat 9
Classification: Unclassified
Component: Cluster (show other bugs)
Version: 9.0.x
Hardware: All All
: P2 normal (vote)
Target Milestone: -----
Assignee: Tomcat Developers Mailing List
Depends on:
Reported: 2019-05-15 15:27 UTC by Mark Thomas
Modified: 2019-05-16 14:28 UTC (History)
0 users


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Description Mark Thomas 2019-05-15 15:27:02 UTC
Reviewing the DeltaSession code I noticed that, for a newly created DeltaSession, that a DeltaRequest is not created until the request is completed.

That means any changes made to a newly created session in the request where the session is created cannot be replicated as there is no DeltaRequest to record the changes. I have confirmed this behaviour on my local test cluster.

The fix should not be too tricky and should tie in with the changes planned to address bug 62841.
Comment 1 Mark Thomas 2019-05-15 18:37:32 UTC
Just a note that the problem statement is correct but the analysis is not. I'm still digging into what is going wrong.
Comment 2 Mark Thomas 2019-05-16 09:09:24 UTC
I've been able to identify the root cause. The session update message is being processed before the session create message.

The chances of this issue were reduced in a previous fix:

I plan to look to see if there is more that can be done.
Comment 3 Mark Thomas 2019-05-16 14:28:18 UTC
Fixed in:
- master for 9.0.21 onwards
- 8.5.x for 8.5.42 onwards
- 7.0.x for 7.0.95 onwards