ScyllaDB Open Source Release 4.0.1

ScyllaDB Open Source 4.0.1 is a bugfix release for the ScyllaDB 4.0 stable branch, maintaining backward compatibility and supporting rolling upgrades. The release addresses several issues, including an integer overflow in the CQL index reader that could affect queries on large index files, as well as various stability-related concerns such as race conditions during node failures, topology changes, and speculative retries. Additionally, it resolves a stability issue with hinted handoff that could lead to increased memory usage due to invalid hints. The update also fixes a runtime error in the fstrim service within scylla_util.py. Users are encouraged to report any problems encountered with the release.

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