Eric Shu created GEODE-7663:
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Summary: Delta updates can be lost in client cache proxy due to
asynchronous nature of HARegionQueue
Key: GEODE-7663
URL: https://issues.apache.org/jira/browse/GEODE-7663
Project: Geode
Issue Type: Bug
Components: client queues
Reporter: Eric Shu
This was found when trying to add test coverage for Tomcat Server (GEODE-7109).
Assume client1 (cache proxy) creates session (from tomcat server1) and updates
attributes a few times. These delta updates will be send to Geode servers. For
each update, server will generate a new version and will queue these delta
updates to send to other client caches.
Assume that there is a fail over case and the session fail over to tomcat
server2 (with geode client 2 cache proxy cache). The newer update on the
session on client 2 will be sent to servers. Once the update is successful on
the server, it will be applied to client 2 local cache (with a newest version
for the key). Now this cache operation will block the earlier updates sent
through HARegionQueue from server to client 2. This will lead to attributes
(delta updates) are lost on client 2 local cache -- causing the data
inconsistency.
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