New Features

finagle-opencensus-tracing: Add support for providing a custom TextFormat for header
propagation. a02d377a

Runtime Behavior Changes

finagle-netty4: When not using the JDK implementation, the Netty reference counted SSL
types are used which move SSL cleanup out of the GC cycle, reducing pause durations.
466aa5bf
finagle-base-http: Support for the SameSite cookie attribute is now on by default. This can
be manipulated via the com.twitter.finagle.http.cookie.supportSameSiteCodec flag. This means
that cookies that have a value other than Unset for the sameSite field will have the
attribute encoded (by servers) and decoded (by clients). See this
Chromium blog post
for more information about the SameSite attribute. f96c3729
finagle-core: The default NullTracer for ClientBuilder has been removed. Affected clients may
now see tracing enabled by default via the Java ServiceLoader, as described in the
Finagle User's Guide. 6b3f0940
finagle-http2: The HTTP/2 frame logging tools now log at level INFO. This is symmetric with
the behavior of the ChannelSnooper tooling which serves a similar purpose which is to aid
in debugging data flow and isn't intended to be enabled in production. 78e4596b

finagle-zipkin-scribe: add a logical retry mechanism to scribe's TRY_LATER response 23ff595b
finagle-http2: Initialize state in H2Pool before use in the gauge to avoid a
NullPointerException. 289de8a3
finagle-http2: HTTP/2 server pipeline now traps close calls to ensure that
events from the initial HTTP/1.x pipeline don't close the HTTP/2 session. For
example, the initial pipeline was subject to session timeouts even though the
tail of the socket pipeline was effectively dead. Closing of HTTP/2 server
pipelines is now handled through the H2ServerFilter. 670dbf74
finagle-http2: HTTP/2 servers clean out unused channel handlers when upgrading
from a HTTP/1.x pipeline, removing some traps such as unintended timeouts.
3dfe8226
finagle-opencensus-tracing: Fixed internal server error when invalid or no propagation headers
are provided. a02d377a
finagle-zipkin-scribe: export application metrics under a consistent zipkin-scribe scope. Finagle client
stats under clnt/zipkin-scribe a17659dd

finagle-zipkin-scribe: update the deprecated FutureIface to MethodPerEndpoint 23ff595b
finagle-zipkin-scribe: Coalesce ScribeRawZipkinTracer apply methods into two simple ones. a17659dd
finagle-zipkin-scribe: DefaultSampler moved to c.t.f.zipkin.core in finagle-zipkin-core. ac9c7ec1
finagle-zipkin-scribe: initialSampleRate GlobalFlag is moved to finagle-zipkin-core, under the same package
scope c.t.f.zipkin. ac9c7ec1