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Scylla Enterprise 2020.1.7

The ScyllaDB team announces the release of Scylla Enterprise 2020.1.7, a bug-fix production-ready Scylla Enterprise patch release for Scylla Enterprise 2020.1. As always, Scylla Enterprise customers are encouraged to upgrade to Scylla Enterprise 2020.1.7 in coordination with the Scylla support team.

Full list of stability improvements and bug fixes below.

Related Links

Fixed issues in this release are listed below, with open source references, if present:

  • CQL: Invalid aggregation result on table with index: When using aggregates (COUNT(*)) on table with index on clustering key and filtering on clustering key, wrong results are returned  #7355
  • CQL: CQL prepared statements incomplete support for “unset” values #7740
  • CQL: Restrictions missing support for “IN” on tables with collections, added in Cassandra 4.0 #7743 #4251
  • CQL: Requests Role or User are now tracked in the tracing output #6737
  • Tools: Nodetool tablestats reports inconsistent bloom filter size #4513
  • Tools: Empty partition keys make nodes unbootable #6106
  • Stability: Commit log performance regression introduced in 2020.1.0 had the unfortunate side effect with O_DSYNC: each 128k writes also needs to flush the XFS log.
  • Stability: Unexpected partition key when repairing with different number of shards may resulting in error similar to: “WARN  2020-11-04 19:06:41,168 [shard 1] repair - repair_writer: keyspace=ks, table=cf, multishard_writer failed: invalid_mutation_fragment_stream ”. This error may occur when running repair between nodes with a different core number. #7552 Seastar #867
  • Stability: upgrade which include system schema changes may fail. For example from 2019.1 to 2020.1.
  • Stability: A materialized view update of a large partition may cause large allocation which can cause  an endless view update apply attempt → failure → retry loop
  • Stability: Fix cross-shard sharing of schema_ptr potentially leading to use-after-free of schema #7535
  • Stability: ‘ascii’ type column isn’t validated, and one could create illegal ascii values by using CQL without bind variables #5421
  • Stability: Scylla records large data cells in the system.large_rows table. If such a large cell was part of a static rows, Scylla would crash #6780
  • Stability: Hinted handoff is using very long timeout to sending some hints #7051
  • Stability: materialized view builder:  Scylla stuck on stopping #7077
  • Stability: a rare race condition may cause TWCS sometimes stops dropping expired SSTables #8038
    Scylla on AWS: When psutil.disk_paritions() reports / is /dev/root, aws_instance mistakenly reports root partition is part of ephemeral disks, and RAID construction will fail. #8055
  • Stability: stream_session::prepare is missing a string format argument #8067
  • Monitoring: False 1 second latency reported in I/O queue delay metrics #8166

09 Mar 2021