Scylla Open Source 3.0.7

The ScyllaDB team announces the release of Scylla Open Source 3.0.7, a bugfix release of the Scylla Open Source 3.0 stable branch. Scylla Open Source 3.0.7, like all past and future 3.x.y releases, is backward compatible and supports rolling upgrades.

Related links:

Issues solved in this release:

  • “mc” SSTable file format: empty counters were not handled correctly, which could lead to Coredump #4363. Note that mc format is disabled by default in 3.0. More on mc (Apache Cassandra 3.0 format) here
  • Range scan: in a rare condition, a specific combination of data and its alignment in the reader buffer, can lead to missing rows from a range scan #4418. Two things are needed to trigger this defect:
    • A range tombstone that has the same start bound as the row just after it in the stream
    • This range tombstone is the *last* fragment in the reader’s buffer, and that the reader is evicted after the buffer is consumed.
  • TimeWindowCompactionStrategy: on some very rare cases, a use after free may hurt performance #4465
  • Heat Weighted Load Balancing: on some cases, calculation the HWLB for a large number of tables may cause stalls which will be seen as latency spikes. See commit

31 May 2019