I'm using Cassandra as a storage mechanism for session state persistence for an ASP.NET web application. I am seeing issues where the session state is persisted on one page (setting a value: Session["key"] = "value" and when it redirects to another (from a post back event) and check for the existence of the value that was set, it doesn't exist.
It's a 12 node cluster with 2 data centers (6 and 6) running 2.1.9. The key space that the column family lives has a RF of 3 for each data center. The session state provider is using the the datastax csharp driver v2.1.6. Writes and reads are at LOCAL_QUORUM. The cluster and web servers have their time synced and we've ruled out clock drift issues. The issue doesn't happen all the time, maybe two to three times a day. Any insight as to what to look at next? Thanks! ~Eric Plowe
