Sourced from google.golang.org/grpc's releases.

Release 1.56.3

Security

• server: prohibit more than MaxConcurrentStreams handlers from running at once (CVE-2023-44487)

  In addition to this change, applications should ensure they do not leave running tasks behind related to the RPC before returning from method handlers, or should enforce appropriate limits on any such work.

Release 1.56.2

• status: To fix a panic, status.FromError now returns an error with codes.Unknown when the error implements the GRPCStatus() method, and calling GRPCStatus() returns nil. (#6374)

Release 1.56.1

• client: handle empty address lists correctly in addrConn.updateAddrs

Release 1.56.0

New Features

• client: support channel idleness using WithIdleTimeout dial option (#6263)
  • This feature is currently disabled by default, but will be enabled with a 30 minute default in the future.
• client: when using pickfirst, keep channel state in TRANSIENT_FAILURE until it becomes READY (gRFC A62) (#6306)
• xds: Add support for Custom LB Policies (gRFC A52) (#6224)
• xds: support pick_first Custom LB policy (gRFC A62) (#6314) (#6317)
• client: add support for pickfirst address shuffling (gRFC A62) (#6311)
• xds: Add support for String Matcher Header Matcher in RDS (#6313)
• xds/outlierdetection: Add Channelz Logger to Outlier Detection LB (#6145)
  • Special Thanks: @​s-matyukevich
• xds: enable RLS in xDS by default (#6343)
• orca: add support for application_utilization field and missing range checks on several metrics setters
• balancer/weightedroundrobin: add new LB policy for balancing between backends based on their load reports (gRFC A58) (#6241)
• authz: add conversion of json to RBAC Audit Logging config (#6192)
• authz: add support for stdout logger (#6230 and #6298)
• authz: support customizable audit functionality for authorization policy (#6192 #6230 #6298 #6158 #6304 and #6225)

Bug Fixes

• orca: fix a race at startup of out-of-band metric subscriptions that would cause the report interval to request 0 (#6245)
• xds/xdsresource: Fix Outlier Detection Config Handling and correctly set xDS Defaults (#6361)
• xds/outlierdetection: Fix Outlier Detection Config Handling by setting defaults in ParseConfig() (#6361)

API Changes

• orca: allow a ServerMetricsProvider to be passed to the ORCA service and ServerOption (#6223)

Release 1.55.1

• status: To fix a panic, status.FromError now returns an error with codes.Unknown when the error implements the GRPCStatus() method, and calling GRPCStatus() returns nil. (#6374)

• 1055b48 Update version.go to 1.56.3 (#6713)
• 5efd7bd server: prohibit more than MaxConcurrentStreams handlers from running at once...
• bd1f038 Upgrade version.go to 1.56.3-dev (#6434)
• faab873 Update version.go to v1.56.2 (#6432)
• 6b0b291 status: fix panic when servers return a wrapped error with status OK (#6374) ...
• ed56401 [PSM interop] Don't fail target if sub-target already failed (#6390) (#6405)
• cd6a794 Update version.go to v1.56.2-dev (#6387)
• 5b67e5e Update version.go to v1.56.1 (#6386)
• d0f5150 client: handle empty address lists correctly in addrConn.updateAddrs (#6354) ...
• 997c1ea Change version to 1.56.1-dev (#6345)
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