v2.2.2

Bifrost Node v2.2.2

Release Date: September 3, 2026
Rust Compiler: rustc 1.94.0 (4a4ef493e 2026-03-02)

Note

This is not a mandatory update for node operators. v2.2.2 only bumps the parity-db database backend to pick up an upstream deadlock fix; there are no runtime, consensus, or storage-format changes. The fix applies only to nodes running with --database paritydb. Nodes using RocksDB (--database rocksdb, the default) are unaffected. Nodes running v2.2.1 stay fully compatible with the network — operators may upgrade at their convenience, though upgrading is recommended for ParityDB nodes that sustain heavy write bursts.

Summary

This release bumps parity-db to v0.5.6 across the client and its dependencies, cherry-picking an upstream fix that removes a deadlock between the commit worker and the log-cleanup worker under sustained write load. The change is isolated to the node client — the mainnet and testnet runtimes are untouched. RocksDB (the default database backend) is not affected.

Changes

Deps: Bump parity-db to v0.5.6

• Bumped parity-db to v0.5.6, consolidating the previously mixed 0.4.13 / 0.5.4 dependency tree onto a single version
• Picks up paritytech/parity-db#252 ("fix: deadlock between commit worker and cleanup worker")
  • Under a sustained enactment backlog (log enactment falling behind log flushing), the commit worker could park waiting on the log-cleanup cap while the cleanup worker was never signalled, deadlocking both
  • The commit worker now signals the cleanup worker before parking, so cleanup can make progress and release the cap
• Propagated through the dependency stack via:
  • polkadot-sdk fork: bifrost-platform/polkadot-sdk#6
  • bifrost-frontier: b96e6d5
• RocksDB (the default database backend) is unchanged; this bump has no effect on nodes using --database rocksdb

Versions

Component	Version
Client	v2.2.2
Mainnet Runtime	v2048
Testnet Runtime	v507
Polkadot SDK	bifrost-polkadot-stable2512
Rust Toolchain	1.94.0