Tag: FencingToken

All the articles with the tag "FencingToken".

• Why You Cannot Simply Add a Second Instance to an In-Memory Pool

  31 Jul, 2026

  A second reputation-pool-cloud instance can grant the same resource twice, issue colliding JVM-local fencing tokens, and overwrite another instance's whole-snapshot checkpoint. This is a deterministic counterexample derived from the current code, not an observed production incident. The article traces the scope of leases, snapshots, memory budgets, and rate limits, then compares tenant sharding, externalized state, and a single writer.