* Vault no longer supports running netRPC plugins. These were deprecated in favor of gRPC based plugins and any plugin built since 0.9.4 defaults to gRPC. Older plugins may need to be recompiled against the latest Vault dependencies.
## Known Issues
-> **NOTE:** This is a known issue applicable to _Vault Enterprise_.
During upgrades to 1.1.0, 1.1.1 or 1.1.2, Vault replication secondaries may
require an automatically-triggered reindex, either if upgrading from a pre-0.8
version of Vault or if a previously-issued reindex operation has failed in the
past. In these reindex scenarios, the secondary cluster will perform a complete
WAL replay, which can take a long time and is a partially blocking operation.