Release of Vitess v16.0.2

Known Issues

Schema-initialization stuck on semi-sync ACKs while upgrading to v16.0.2

During upgrades from <= v15.x.x to v16.0.2, as part of PromoteReplica call, the schema-init realizes that there are schema diffs to apply and ends up writing to the database if semi-sync is enabled, all of these writes get blocked indefinitely. Eventually, PromoteReplica fails, and this fails the entire PRS call.

A fix for this issue was merged on release-16.0 in PR#13441, read the corresponding bug report to learn more.

This issue is fixed in v16.0.3 and later patch releases.

Broken downgrade from v17.x.x when super_read_only turned on by default

In v17.x.x super_read_only is turned on by default meaning that downgrading from v17 to v16.0.2 breaks due to init_db.sql needing write access.

This issue is fixed in >= v16.0.3 thanks to PR #13525

Major Changes

Upgrade to go1.20.3

Vitess v16.0.2 now runs on go1.20.3. Below is a summary of this Go patch release. You can learn more here.

go1.20.3 (released 2023-04-04) includes security fixes to the go/parser, html/template, mime/multipart, net/http, and net/textproto packages, as well as bug fixes to the compiler, the linker, the runtime, and the time package. See the Go 1.20.3 milestone on our issue tracker for details.

EffectiveCallerId in Vtgate gRPC calls

A new flag grpc-use-static-authentication-callerid is added to gate the behavior introduced in https://github.com/vitessio/vitess/pull/12050. Earlier, we used to automatically set immediateCallerID to user from static authentication context that overrode the EffectiveCallerId.

Shard name validation in TopoServer

Prior to v16.0.2, it was possible to create a shard name with invalid characters, which would then be inaccessible to various cluster management operations.

Shard names may no longer contain the forward slash ("/") character, and TopoServer's CreateShard method returns an error if given such a name.

The entire changelog for this release can be found here.

The release includes 24 commits (excluding merges)

Thanks to all our contributors: @GuptaManan100, @ajm188, @frouioui, @github-actions[bot], @harshit-gangal, @mattlord, @systay, @vitess-bot[bot]