akka/akka-core: technical due diligence, read from its repository

The median source file here is 105 lines. 45 files exceed 1,050 lines, the largest being 23,995. Size is not a defect on its own — some problems genuinely live in one place — but these are where merge conflicts, review fatigue and single-owner knowledge concentrate, and they are the first thing that slows an inheriting engineer down.

100 files were marked deprecated over two years ago and still are, the oldest since Jan 2011. A deprecation is a promise to remove. Ask what still depends on these, and whether removing them is scheduled.

The newest release, v10.1.0, is not on the branch this survey read; the newest release on it is v2.10.22. The shipped product may differ from what this report describes. Survey the release branch too.

8 third-party CI actions are referenced by a tag or branch rather than a commit, so they run whatever that tag points to on the day. Tags have been moved to malicious commits in real supply-chain attacks, and a piped script is whatever the server returns that minute. Pinning to a commit is the fix, and it is small.

LICENSE grants BUSL-1.1: source available, not open source; production use restricted until the change date. The reading comes from the licence's own title and clauses. Whether the terms fit the buyer's intended use, and whether any paid licence transfers with the code, is a question for counsel and the licensor.

The root licence changed 1 time(s). The latest terms restrict what users, hosts or a buyer may do in ways the earlier ones did not. Code taken under the old terms stays under them, so both matter in diligence.

Nothing in the service initialises an error reporter (Sentry, Rollbar, Bugsnag, Honeybadger or an APM agent). An exception in production reaches a person only if someone is reading the logs, which usually means a customer reports it first.

1 deployments set `replicas: 1`, and nothing (an autoscaler, a disruption budget) adds more. Every deploy and every node drain is downtime, and the availability the buyer inherits has a ceiling.