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.. Author notes: this file is formatted with restructured text
(http://docutils.sourceforge.net/docs/user/rst/quickstart.html)
as it is included in Finagle's user's guide.
Note that ``RB_ID=#`` correspond to associated messages in commits.
6.x
-----
New Features
~~~~~~~~~~~~
* finagle-http: Support nacks between Finagle Http clients and servers. When a server fails
with retryable exceptions (exceptions wrapped by `Failure.rejected`), it sends back a "Nack"
response, i.e. 503 Response code with a new "finagle-http-nack" header. This allows clients
to safely retry failed requests, and keep connections open. ``RB_ID=705948``
Runtime Behavior Changes
~~~~~~~~~~~~~~~~~~~~~~~~
* finagle-core: When evaluating NameTree unions, return components of the union in Ok state rather
than waiting for all components to be Ok. This enables resilience of unions when part of the
tree cannot be resolved. ``RB_ID=697114``
* finagle-thrift: Replace manually-compiled files with a scrooge-generated thrift target.
This changes the hashCode implementation of tracing-related structures: hashCode always returns 0
in the old implementation, and is calculated from structure fields in the new one. ``RB_ID=707520``
Breaking API Changes
~~~~~~~~~~~~~~~~~~~~
* finagle-stream: Introduce StreamRequest as a replacement for Netty's
HttpRequest, and converted the rest of the public API to not leak
other Netty types (notably ChannelBuffer is replaced by Buf). ``RB_ID=695896``
* finagle-core: Dtab does not implement the Namer interface anymore. Use
`c.t.f.naming.DefaultInterpreter` to bind a name via a Dtab. Support for Dtab entries starting
with /#/ has been removed. `c.t.f.Namer.bindAndEval` has been removed. Use
`c.t.f.Namer.resolve` instead. ``RB_ID=711681``
6.26.0
~~~~~~~
Deprecations
~~~~~~~~~~~~
* finagle-memcached: Deprecated in favor of finagle-memcachedx and now removed.
New Features
~~~~~~~~~~~~
* finagle-httpx: Support nacks between Finagle Http clients and servers. When a server fails
with retryable exceptions (exceptions wrapped by `Failure.rejected`), it sends back a "Nack"
response, i.e. 503 Response code with a new "finagle-http-nack" header. This allows clients
to safely retry failed requests, and keep connections open. ``RB_ID=670046``
Breaking API Changes
~~~~~~~~~~~~~~~~~~~~
* finagle-core: Moved netty3 specific things into a netty3 namespace. For
these symbols, the namespace translation follows this pattern:
`c.t.f.$MODULE._ => c.t.f.netty3.$MODULE._.` ``RB_ID=691746``
* finagle-core: Define `WeightedSocketAddress` as a case class. Add
`WeightedSocketAddress.extract` method to extract weight. ``RB_ID=614228``
* finagle-core: Constructing a new Balancer that can be injected into a Finagle client
was unnecessarily complex and non-uniform. We removed the legacy constructors around
defining the collection of endpoints and simplified the interface to `LoadBalancerFactory`.
Now, `com.twitter.finagle.loadbalancer.Balancers` defines the collection of balancer
constructors. ``RB_ID=660730``
* finagle-core: Aperture can no longer be enabled via command line flags. Configuring
per-client settings globally is generally not a good idea and we're working to remove
these flags from Finagle. Use the constructors in `com.twitter.finagle.loadbalancer.Balancers`
to create an instance that can be injected into a client. ``RB_ID=663194``
* finagle-core: The default load balancer has changed to p2c from heap. ``RB_ID=693450``
* finagle-core: `Service.isAvailable` and `ServiceFactory.isAvailable` is finalized.
`Service.status` and `ServiceFactory.status` supersedes `isAvailable` usage since 6.24.0 release.
``RB_ID=678588``
* finagle-core: `ClientBuilder.failureAccrual` method is removed. Use `ClientBuilder.failureAccrualFactory`
instead. ``RB_ID=689076``
* finagle-core: Stack param `ClientBuilder.ClientConfig.FailureAccrualFac` is removed.
Use `ClientBuilder.failureAccrualFactory` instead. ``RB_ID=689076``
* finagle-exception: `com.twitter.finagle.exception.ExceptionReporter` is no longer used
as the default `com.twitter.finagle.util.ReporterFactory`. ``RB_ID=674646``
* finagle-kestrel: Replace deprecated finagle-kestrel package with finagle-kestrelx.
``RB_ID=667920``
* finagle-core: Add new method `noFailureAccrual` on `ClientBuilder` that completely disables
`FailureAccrualFactory` in the underlying stack. ``RB_ID=689076``
6.25.0
------
Breaking API Changes
~~~~~~~~~~~~~~~~~~~~
* finagle-core: `c.t.f.builder.Server` now implements `c.t.f.ListeningServer`.
* finagle-core: `c.t.f.Server.serveAndAnnounce` with a `ServiceFactory` had
its first argument renamed to `name` from `forum`.
* finagle-core: Add an attribute map to `c.t.f.Addr.Bound`.
* finagle-core: `c.t.f.builder.ClientConfig.FailFast` has moved to
`c.t.f.FailFastFactory.FailFast`.
* finagle-core: NoBrokersAvailableException now has two Dtab constructor
arguments, both the base and local Dtabs.
* finagle-core: `c.t.f.Failure` convenience constructors (e.g., `Failure.Cause`,
`Failure.Rejected`) were removed in favor of uniform flag treatment, and clean
separation of attributes from interpretation of those attributes.
* finagle-core: `ExitGuard` usage is now private to finagle.
* finagle-core: `c.t.f.service.TimeoutFilter.module` is now split into
`TimeoutFilter.clientModule` and `TimeoutFilter.serverModule`.
* finagle-core: remove deprecated `c.t.f.builder.ClientBuilder.stack` taking a
`Stack.Params => Client[Req1, Rep1]`.
* finagle-core: StackRegistry.Entry takes different constructor arguments, and the
name has been bundled in with the Stack.Params. StackRegistry.Entry is only used
internally, so this should be relatively inexpensive. Similarly, StackRegister#register
has also had a small change to its method signature along the same lines.
* finagle-http: deprecated methods in `c.t.f.http.HttpMessageProxy` have been removed.
* finagle-memcached / finagle-memcachedx: move TwitterCacheResolver
and related objects to new finagle-cacheresolver package.
* finagle-memcached / finagle-memcachedx: failureAccrual param in ReplicationClient
is changed from type (Int, Duration) to (Int, () => Duration), to allow flexibility
to config duration. Also see `markDeadFor` change in finagle-core in the "New Features"
section below.
* finagle-memcached / finagle-memcachedx: MigrationClientTest now uses
ServerCnxnFactory from com.twitter.zk rather than NIOServerCnxn.Factory from
org.apache.zookeeper.server.
* finagle-mux: `c.t.f.mux.RequestNackedException` is removed in favor of a standard
Failure (`c.t.f.Failure.Rejected`).
* finagle-ostrich4: Switched dependency to finagle-httpx from finagle-http.
* finagle-serversets: ZkInstance in tests now uses ServerCnxnFactory from
com.twitter.zk rather than NIOServerCnxn.Factory from
org.apache.zookeeper.server.
* finagle-stats: Switched dependency to finagle-httpx from finagle-http.
* finagle-mysql: PreparedStatements are now more type-safe! The type signature of
PreparedStatements has changed from Seq[Any] => Future[Result] to Seq[Parameter] =>
Future[Result]. Parameter represents objects that are serializable by finagle-mysql.
In most cases, scalac should transparently wrap your arguments in Parameter when
applying a PreparedStatement. However, in cases where this doesn't happen you
can explicitly wrap them using `Parameter.wrap`.
Runtime Behavior Changes
~~~~~~~~~~~~~~~~~~~~~~~~
* finagle-core: `com.twitter.finagle.service.StatsFilter` no longer requires a
`com.twitter.finagle.stats.RollupStatsReceiver` for correct behaviour, and
providing one will double count failures.
* finagle-core: `com.twitter.finagle.factory.TimeoutFactory` will fail with
a retryable `com.twitter.finagle.Failure` when it times out.
* finagle-core: `com.twitter.finagle.pool.WatermarkPool` will fail with
an interrupted `com.twitter.finagle.Failure` when it is interrupted while
waiting or trying to establish a connection. It has previously failed with
a `com.twitter.finagle.WriteException` when trying to establish a
connection, but it's incorrect to retry on an interruption.
* finagle-core: `com.twitter.fiangle.RetryPolicy`'s `RetryableWriteException`
and `WriteExceptionsOnly` will not retry on `com.twitter.finagle.Failure`s
that are marked `InterruptedBy`, even if they are `Retryable`.
* finagle-core: The error message provided by `c.t.f.NoBrokersAvailableException`
prints both the base and local Dtabs.
* finagle-core: Stats produced by `com.twitter.finagle.factory.BindingFactory`
are now scoped with the "namer" prefix rather than "interpreter". The total
latency associated with Name binding is now recorded in the "bind_latency_ms"
stat.
* finagle-core: The "service_creation/service_acquisition_latency_ms" stat
produced by `com.twitter.finagle.factory.StatsFactoryWrapper` no longer
includes time spent in name resolution, which is now covered by
"namer/bind_latency_us" as discussed above.
* finagle-core: added transit_latency_ms and deadline_budget_ms stats.
* finagle-core: Automatic retries (requeues) are now credited as a ratio of
requests over a window of time, instead of a fixed limit. The stats scope
has also changed from "automatic" to "requeues".
Deprecations
~~~~~~~~~~~~
* finagle-core: `c.t.f.builder.Server.localAddress` is deprecated in favor of
`c.t.f.ListeningServer.boundAddress`.
New Features
~~~~~~~~~~~~
* finagle-core: `Fail fast <https://twitter.github.io/finagle/guide/FAQ.html#why-do-clients-see-com-twitter-finagle-failedfastexception-s>`_
is now `configurable <https://twitter.github.io/finagle/guide/FAQ.html#configuring-finagle6>`_
on Stack-based clients via the `com.twitter.finagle.FailFastFactory.FailFast` param.
* finagle-core: `com.twitter.finagle.service.StatsFilter` is now configurable with an
`com.twitter.finagle.stats.ExceptionStatsHandler` to customize how failures are recorded.
* finagle-core: It should be safe to match on `com.twitter.finagle.Failure.InterruptedBy`
to tell if a `com.twitter.util.Future` failed due to being interrupted.
* finagle-core: `markDeadFor` in c.t.f.service.FailureAccrualFactory.Param is changed from
Duration type to () => Duration. So it's flexible for clients to pass in a function that
specifies Duration. For example, c.t.f.service.FailureAccrualFactory provides a function
that adds perturbation in durations. Stack-based API and c.t.f.builder.ClientBuilder
support both types for client configuration. For example,
::
Thrift.client.configured(FailureAccrualFactory(5, () => 1.seconds))
// or
Thrift.client.configured(new FailureAccrualFactory(5, 1.seconds)).
c.t.f.client.DefaultClient does not support Duration type in failureAccrual anymore.
* finagle-core: improved Java compatiblity for `c.t.f.Stack.Params` / `c.t.f.Stack.Parameterized`.
* finagle-core: Introduce the ability to add metadata to bound `com.twitter.finagle.Addr`s.
* finagle-core: Introduce per-address latency compensation. Clients may be configured with
a 'Compensator' function that uses the client's address metadata to adjust connection and
request timeouts. This can be used, for instance, to account for speed-of-light latency
between physical regions.
* finagle-core: Introduce per-address stats scoping. Clients may be configured with
a `com.twitter.finagle.client.StatsScoping.Scoper` function that uses the client's
address metadata to adjust the scope of client stats. This can be used, for instance,
to properly scope client stats for a Name that resolves to a Union of distinct clusters.
* finagle-core: A convenient method `Client.newService(dest: String, label: String)` was added.
* finagle-core: ExitGuard now has an 'explainGuards' method to provide a human-readable
description of exit guards that are still active.
* finagle-http(x): Two missing params were added: `Decompression` and `CompressionLevel`. Both
client and server may be configured with either `configured` method or `withDecompression`/
`withCompressionLevel`.
* finagle-mysql: Add support for MySQL transactions.
* finagle-stats: A new HostStatsReceiver type is added and used for per host stats.
It is loaded through LoadService and used by the Stack-based API as a default
param. Per host stats can be turned on through `com.twitter.finagle.loadbalancer.perHostStats`
flag, and is exported to the "/admin/per_host_metrics.json" route in twitter-server.
* finagle-stats: Improved compatibility when migrating from
`Ostrich <https://github.com/twitter/ostrich/>`_ stats via two flags:
``com.twitter.finagle.stats.useCounterDeltas=true`` and
``com.twitter.finagle.stats.format=ostrich``. If these flags are both set,
HTTP requests to ``/admin/stats.json`` with the ``period=60`` query string
parameter will replicate Ostrich's behavior by computing deltas on counters
every minute and formatting histograms with the same labels Ostrich uses.
* finagle-memcached(x): Add `c.t.f.memcached.Memcached` which provides a Stack
based Memcache client that uses pipelining.
Bug Fixes
~~~~~~~~~
* finagle-core: `c.t.f.Server.serveAndAnnounce` for a `Service` had its usage
of `name` and `addr` transposed.
Miscellaneous Cleanup
~~~~~~~~~~~~~~~~~~~~~
* finagle-protobuf: Move entire unused subproject to the `Finagle
organization on GitHub <https://github.com/finagle/finagle-protobuf>`_.
6.24.0
------
Breaking API Changes
~~~~~~~~~~~~~~~~~~~~
* finagle-core: Remove `c.t.f.client.StackClient.Role.loadBalancer`, which
was unused and duplicated by `c.t.f.loadbalancer.LoadBalancerFactory.role`.
* finagle-core: `c.t.f.Namer.orElse` was removed; composing Namers
may be accomplished by constructing an appropriate Dtab.
* finagle-core: removed experimental `enum` / `expand` from
`c.t.f.Namer` and `alt` / `union` from `c.t.f.Dtab`.
* finagle-http: Remove `c.t.f.http.CheckRequestFilter` along with
`c.t.f.http.CheckHttpRequestFilter`. The functionality has been
added to `c.t.f.http.codec.HttpServerDispatcher`. In addition,
the codecError in `c.t.f.http.BadHttpRequest` has been replaced
with the exception thrown by the HttpServerCodec.
* finagle-httpx: Remove deprecated code, limited scope of access on internal
classes.
* finagle-mux: `c.t.f.mux.lease.exp.WindowedByteCounter` no longer
calls `Thread.start()` in its constructor. This should be now be
done by the caller.
* finagle-mux: The experimental session API is discontinued.
* finagle-mux: Introduce new Request and Response types for mux services.
The new mux request includes a `destination` path so that, which corresponds
to the `destination` field in Tdispatch requests. Furthermore, these new
types expose `c.t.io.Buf` instead of Netty's ChannelBuffers.
* finagle-thrift,finagle-thriftmux: `c.t.f.Thrift.Client`, `c.t.f.Thrift.Server`,
`c.t.f.ThriftMux.Client` and `c.t.f.ThriftMux.Server` have their
`TProtocolFactory` configured via a `c.t.f.thrift.param.ProtocolFactory`
`Stack.Param`.
* finagle-thriftmux: `c.t.f.ThriftMux.Client` now has its `ClientId`
configured via a `c.t.f.thrift.param.ClientId` `Stack.Param`.
* Traces (``com.twitter.finagle.tracing.Trace``) lose their local-state mutating methods:
``Trace.clear``, ``Trace.pushId``, ``Trace.setId``, ``Trace.setTerminalId``, ``Trace.pushTracer``,
``Trace.pushTracerAndSetNextId``,
``Trace.state_=``, and ``Trace.unwind``.
Let-bound versions of these are introduced in their stead.
This makes it simple to ensure that state changes are properly delimited;
further, these are always guaranteed to be delimited properly by Finagle.
::
Trace.setTracer(tracer)
codeThatUsesTracer()
// Let-bound version:
Tracer.letTracer(tracer) {
codeThatUsesTracer()
}
* Context handlers (``com.twitter.finagle.Context``) are removed.
They are replaced by the use of marshalled request contexts
(``com.twitter.finagle.context.Contexts.broadcast``).
Marshalled request contexts do not require the use of service loading,
so their use no longer requires build system coordination.
We show Finagle's trace context:
the first version uses the old context handler mechanism;
the second uses ``Contexts.broadcast``.
::
// The old context handler for Finagle's tracing context. Note that this
// also required the file
// finagle-core/src/main/resources/META-INF/services/com.twitter.finagle.ContextHandler
// to contain the fully qualifed class path of the below object.
class TraceContext extends ContextHandler {
val key = Buf.Utf8("com.twitter.finagle.tracing.TraceContext")
def handle(body: Buf) {
// Parse 'body' and mutate the trace state accordingly.
}
def emit(): Option[Buf] = {
// Read the trace state and marshal to a Buf.
}
}
// New definition. No service loading required.
private[finagle] val idCtx = new Contexts.broadcast.Key[TraceId] {
val marshalId = Buf.Utf8("com.twitter.finagle.tracing.TraceContext")
def marshal(id: TraceId): Buf = {
// Marshal the given trace Id
}
def tryUnmarshal(body: Buf): Try[TraceId] = {
// Try to marshal 'body' into a trace id.
}
}
Runtime Behavior Changes
~~~~~~~~~~~~~~~~~~~~~~~~
* finagle-mux: Mark the ServiceFactory available again if the underlying
Service is no longer available. This permits it to be closed and reused.
* finagle-mux: Rename the "lease_counter" counter to "leased" on mux clients.
Deprecations
~~~~~~~~~~~~
* finagle-core: Deprecated the mechanisms of FailureAccrual that use
factory Transformers. It's better to just use the Params to
configure the existing FailureAccrualFactory. However, if you've
actually written your own failure accrual transformer that's
significantly different, then you can do stack.replace() to swap it
in.
* finagle-memcached: Have cas() operation return false on NotFound()
state instead of throw IllegalStateException
New Features
~~~~~~~~~~~~
* finagle-core: All `Stack.Param`s used in `ClientBuilder` and
`ServerBuilder` are now publicly exposed for configuration
parity.
* finagle-mux: Drain mux servers properly, so that shutdowns can be
graceful.
* finagle-core: Introduce `Service.status` which supersedes
`Service.isAvailable`. `Service.status` is a fine-grained
health indicator. The default definition of
`Service.isAvailable` is now defined in terms of
`Service.status`; this definition will soon be made
final.
* finagle-mux: Inject bound residual paths into mux requests.
* *Request contexts.* Request contexts replace the direct use of
com.twitter.util.Local and of com.twitter.finagle.Context.
Request contexts are environments of request-local bindings;
they are guaranteed to be delimited by Finagle,
and their API admits only properly delimited binding.
They come in two flavors:
Contexts.local are always local to handling a single request;
bindings in Contexts.broadcast may be marshalled and transmitted across process
boundaries where there is protocol support.
Currently, both Thrift and Mux (and thus also ThriftMux)
support marshalled contexts.
See `com.twitter.finagle.contexts.Context` for more details.
6.23.0
------
Breaking API Changes
~~~~~~~~~~~~~~~~~~~~
* finagle-core: `c.t.f.Stackable`s maintained state about which parameters were
accessed via `get`. This was error prone and violated the assumption that `Stack`s
are immutable data structures. We removed this in favor of annotating modules with
parameters. The abstract classes for Stackables were also simplified. Now we only have
`Module` and `ModuleN` variants which are more convenient for most definitions.
Since this is an advanced API, it should not impact standard usage of finagle.
* finagle-core: Update ConcurrentRingBuffer to use ClassTag instead of ClassManifest;
rename size argument to capacity.
Deprecations
~~~~~~~~~~~~
* `ServerBuilder.stack[Req1, Rep1](mk: Stack.Params => Server[Req1, Rep1])` is
deprecated in favor of
`ServerBuilder.stack[Req1, Rep1](server: Stack.Parameterized[Server[Req1, Rep1]])`
Runtime Behavior Changes
~~~~~~~~~~~~~~~~~~~~~~~~
* `finagle`: Improve allocation semantics for uses of Buf.
6.22.0
-------
Breaking API Changes
~~~~~~~~~~~~~~~~~~~~
* finagle-core: Removed unused `com.twitter.finagle.service.ProxyService`. It wasn't
sufficiently general to be used outside of finagle, and was no longer used
in finagle.
* Removed TLSEngine, and replaced it with two, TLSClientEngine, and
TLSServerEngine, where TLSServerEngine is the same as TLSEngine, and
TLSClientEngine takes a SocketAddress instead of (). Additionally,
the Netty3TransporterTLSConfig now takes a function SocketAddress => Engine,
instead of () => Engine.
New Features
~~~~~~~~~~~~
* finagle-core: BroadcastStatsReceiver, introduce specialized implementation
* finagle-core: Introduce gauges in SummarizingStatsReceiver
* finagle-core: Introduce Transport#copyToWriter
* finagle-core: Make base Dtab used in BindingFactory a Stack.Param
* finagle-core: Proper decay in experimental ewma load metric
* finagle-core: Simplify Stack{Client, Server} and unify around them
Runtime Behavior Changes
~~~~~~~~~~~~~~~~~~~~~~~~
* finagle-core: Add support for non-URLClassloaders to LoadService
* finagle-core: clear locals before entering server dispatch loop
* finagle-core: Defer DNS Resolution in InetResolver to FuturePool
* finagle-core: for paths starting with /#/, skip rewrites where prefix is /
* finagle-core: include name resolution in tracing request span
* finagle-core: Properly wrap some IOException into ConnectionFailedException
* finagle-core: Scope InetResolver's stats properly
* finagle-http: Send "Connection: close" header while dispatcher is closing
* finagle-http: Set content length header when appropriate
* finagle-memcached: Use interruptible future for the client request readiness
* finagle-stats: Add content-type response header to JsonExporter
* finagle-thrift: Add back connection_preparation_latency stat in Thrift
* finagle-thriftmux: Record protocol as a gauge rather than a counter
Documentation
~~~~~~~~~~~~~
* finagle-core: Add Scaladocs for ChannelBufferBuf and BufChannelBuffer
* finagle-core: link to the FAQ in FailedFastException
* finagle-serversets: Defer DNS resolution for endpoints to InetResolver
* finagle-thrift{,mux}: Clarified with* deprecation warning
* Fix minor issues and missing code blocks in Finagle documentation
Optimization
~~~~~~~~~~~~
* finagle-core: GlobalFlag isn't caching the property value
* finagle-core: recursive-descent Path / NameTree / Dentry / Dtab parsers to reduce heap allocation
Bug Fixes
~~~~~~~~~
* finagle-core: Fix a deadlock in Contexts
* finagle-core: Fix breaking ABI change in SummarizingStatsReceiver
* finagle-core: Fix bug in computing array index in SummarizingStatsReceiver
* finagle-core: Fix build.properties location for maven builds
* finagle-core: Fix synchronization in LeasedFactory
* finagle-core: Fix tracing with Stack{Client, Server}
* finagle-core: Make FailedFastException an instance variable.
* finagle-core: Synchronized access to the Stackable mutable.params map
* finagle-http: Fix CookieMap.rewriteCookieHeaders()
* finagle-http: Fix the memory leak in HttpClientDispatcher
* finagle-mysql: Fix timestamp fractional seconds encoding
* finagle-mysql: Properly heed timezone when extracting TimestampValue
* mux: clear contexts after receive, not in 'finally' clause
6.21.0
------
- `finagle`: Upgrade to scala_2.10
- `finagle-core`: Add weighted address support to InetResolver.
- `finagle-core`: Adds ClientRegistry.expAllRegisteredClientsResolved
- `finagle-core`: Attach Dtab.local to NoBrokersAvailableException in filter
- `finagle-core`: Attempt to add dtab stats to all clients and servers
- `finagle-core`: Avoid SOCKS proxy for both loopback and link-local addresses
- `finagle-core`: Bind names lazily under Alt so we don't do needless lookups
- `finagle-core`: DelayedFactory to detachable implementation
- `finagle-core`: Fix a race in load balancer initialization
- `finagle-core`: Improve loadbalancer logging
- `finagle-core`: Introduce ewma load metric
- `finagle-core`: Log state for ewma load metric
- `finagle-core`: Redesign of twitter-server admin page
- `finagle-core`: Register StackClient with Path dest in ClientRegistry as evaluated against Dtab.base Problem
- `finagle-core`: Rewrote ServiceLoader to avoid creating
- `finagle-core`: SingletonPool: a single-service pool with good semantics
- `finagle-core`: Zipkin tracing for name resolution
- `finagle-core`: fix synchronization in SummarizingStatsReceiver
- `finagle-core`: reusing pool: isAvailable === underlying.isAvailable
- `finagle-docs`: A better picture for filters. (Replaces hand-drawn monstrosity.)
- `finagle-docs`: Add Scaladocs for all public exception classes in Finagle.
- `finagle-docs`: Add a section to the FAQ regarding FailedFastExceptions
- `finagle-exp`: Generify the DarkTrafficFilter problem
- `finagle-guide`: Document stabilizing serverset metrics.
- `finagle-http`: Add support for a Dtab-Local header
- `finagle-http`: Fail requests with invalid X-Dtab headers
- `finagle-http`: Fail requests with invalid X-Dtab headers
- `finagle-http`: TextualContentCompressor should compress textual Content-Type's even when containing a charset
- `finagle-mux`,thriftmux: explain why the files are named Netty3
- `finagle-mux`: Better gc avoidance flags for experimentation
- `finagle-mux`: Enable gc avoidance for parallel gc
- `finagle-mux`: Improve mux's handling of client disconnects
- `finagle-mux`: Improved Garbage Collection Avoidance Docs
- `finagle-mux`: docs and minor cleansing in Message subclasses
- `finagle-mysql`: Switches PreparedCache over to util-cache FutureCache
- `finagle-serversets`: Add support for getEphemerals ZooKeeper call
- `finagle-serversets`: Memoize getChildrenWatchOp instead of globPrefixWatchOp
- `finagle-serversets`: Reuse ObjectMapper in JSON parser.
- `finagle-serversets`: add latency metrics for ServerSet2.
- `finagle-zipkin`: Reduce allocations when tracing
6.20.0
-------
- `finagle`: Smattering of minor cleanups in util and finagle
- `finagle`: Upgrade sbt to 0.13
- `finagle`: Upgrade to Netty 3.9.1.1.Final
- `finagle-core`: Add NameTree.Fail to permit failing a name without fallback
- `finagle-core`: Add a generic DtabStatsFilter
- `finagle-core`: Add a singleton exception and a counter in WatermarkPool
- `finagle-core`: DefaultClient in terms of StackClient
- `finagle-core`: Disable Netty's thread renaming
- `finagle-core`: Fix CumulativeGauge memory leak
- `finagle-core`: Fix negative resolution in Namer.global
- `finagle-core`: Fixed ChannelStatsHandler to properly filter exceptions
- `finagle-core`: Forces finagle-core to use ipv4 network stack
- `finagle-core`: Improve `Failure.toString`
- `finagle-core`: Include path and Dtab.local in NoBrokersAvailableException
- `finagle-core`: Log exceptions caught by ChannelStatsHandler
- `finagle-core`: Make timer-based DNS resolution as default of InetResolver
- `finagle-core`: Reader and getContent symmetry
- `finagle-core`: Reduces log level for common exceptions
- `finagle-core`: Register clients centrally
- `finagle-doc`: Add fintop to companion projects list on Finagle website
- `finagle-http`: Don't emit (illegal) newlines in lengthy dtab header values
- `finagle-http`: Fix code style from an open-source contribution
- `finagle-http`: Migrate from specs to scalatest
- `finagle-kestrel`: Make transaction abort timeout configurable in MultiReader
- `finagle-mux`: Added extra client logging
- `finagle-mux`: Fix broken draining behavior
- `finagle-mux`: Improve granularity of rate to bytes/millisecond
- `finagle-serversets`: Handle errors that occur when fetching endpoints
- `finagle-serversets`: Increase ZK session timeout to 10 seconds
- `finagle-serversets`: Merge WeightedSocketAddresses with same host:port but different weight in Stabilizer
- `finagle-serversets`: Synchronize bug fixes & test coverage across ZK facades
- `finagle-swift`: Fixes pants build warning
- `finagle-thrift`: Add explicit dependency on libthrift
- `finagle-thrift`: Remove usage of java_sources, should be able to depend on it normally
6.19.0
-------
- `finagle-core`: Allow trailing semicolons in dtabs
- `finagle-core`: Rescue exceptions thrown by filter in `Filter.andthen(Filter)`
- `finagle-core`: StackClient, StackClientLike don't leak underlying In, Out types
- `finagle-doc`: Clarify cancellation
- `finagle-doc`: Fix broken link in document
- `finagle-doc`: Fix name footnote in finagle Names docs
- `finagle-http`: Buf, Reader remove Buf.Eof; end-of-stream is None
- `finagle-http`: Prepend comment to JSONP callbacks
- `finagle-http`: Removing specs from the CookieMapSpec test.
- `finagle-kestrel`: Make failFast configurable in Kestrel codec
- `finagle-mysql`: Ensure mysql specific tracing is composed.
- `finagle-mysql`: Finagle MySQL PreparedStatement accepts Value types as params.
- `finagle-serversets`: Identity Providers for Serverset2
- `finagle-thriftmux`: Add withProtocolFactory API endpoint
- `finagle-thriftmux`: Don't reuse InMemoryStatsReceiver in the same test
6.18.0
-------
- `finagle-*`: release scrooge v3.16.0
- `finagle-*`: release util v6.18.0
- `finagle-core`: Add `description` field to com.twitter.finagle.Stackable trait
- `finagle-core`: Add a Flag to turn on per-host stats
- `finagle-core`: Add a service acquisition latency stat to StatsFactoryWrapper
- `finagle-core`: Don't support empty path elements in com.twitter.finagle.Path
- `finagle-core`: Improves FailFastFactory documentation
- `finagle-core`: Make c.t.f.Failure a direct subclass of Exception
- `finagle-core`: Skip SOCKS proxy when connecting to loopback address
- `finagle-core`: Use Monitor from caller's context in DefaultTimer
- `finagle-http`: Add "Enhance Your Calm" and "Too Many Requests" HTTP status codes
- `finagle-http`: Add exp.HttpServer, which allows request limits to be configured
- `finagle-http`: Change Request#params to a memoized def
- `finagle-http`: Stream request body
- `finagle-kestrel`: Add Name-based methods for MultiReader construction
- `finagle-memcached`: Expose the client type `KetamaClient` in the `build()` API
- `finagle-mux`: GC Avoidance Algorithm
- `finagle-mux`: Hook up GC avoidance to servers
- `finagle-mux`: Move UseMux.java to the correct directory
- `finagle-serversets`: Randomizes backoff interval in ZK2
- `finagle-serversets`: Start resolution eagerly in ZK2
- `finagle-stats`: Add a stat-filtration GlobalFlag
- `ostrich`: release ostrich v9.5.2
- `user guide`: Add Google Analytics tracking code
- `user guide`: Add sections about review process and starter issues
- `user guide`: Update Finagle adopter list on user guide website
- `wily`: Add Dtab expansion
6.17.0
-------
- `finagle`: Add list of Finagle adopters
- `finagle`: Upgrade third-party dependencies
- `finagle-core`: Add `Addr.Neg` to the user guide's list of Addr types
- `finagle-core`: Added Failure support for sourcing to finagle
- `finagle-core`: ClientBuilder should turn per-host stats off by default (matching new Client building API).
- `finagle-core`: Implement DefaultServer in terms of StackServer
- `finagle-core`: Improve the Dtab API
- `finagle-core`: Prevent scoping stats with the empty-string
- `finagle-core`: Rolls up the /tries scope properly
- `finagle-core`: ServerStatsReceiver and ClientStatsReceiver can now update their root scope
- `finagle-core`: fix race case in DelayedFactory
- `finagle-core`: introduce AbstractResolver
- `finagle-core`: remove need for hostConnectionLimit when using ClientBuilder#stack
- `finagle-core`: widen to type for ServerBuilder#stack
- `finagle-core`: widen type of ClientBuilder#stack
- `finagle-doc`: Removed a line from conf.py
- `finagle-http`: DtabFilter should always clear dtab headers
- `finagle-http`: add HOST header for CONNECT method
- `finagle-http`: scala 2.10 compatible tests
- `finagle-memcached`: filter out one more cancelling request exception in failure accrual
- `finagle-memcached`: remove empty test
- `finagle-mux`: Improve Mux server close behavior, control messages to non-Mux clients
- `finagle-mux`: Marked a gc test as flaky
- `finagle-mux`: Modifies MuxService to essentially be a Service[Spool[Buf], Spool[Buf]] Problem
- `finagle-mux`: Rm ClientHangupException in favor of CancelledRequestException
- `finagle-mysql`: Retrieving a timestamp from the DB nw creates a timestamp in UTC
- `finagle-mysql`: fix for issue where time was not being returned in UTC for binary protocol
- `finagle-serversets`: Prevent gauges from being garbage collected
- `finagle-thrift`: Blackhole control messages sent to non-mux Thrift clients
- `finagle-thriftmux`: Add per-connection protocol-usage stats
- `finagle-thriftmux`: Add stats to identify ThriftMux clients and servers
- `finagle-thriftmux`: Propagate Contexts from non-ThriftMux clients
- `finagle-thriftmux`: add ClientBuilder#stack compatibility and make APIs symmetric
- `finagle-thriftmux`: pass along ClientId with ClientBuilder API
6.16.0
-------
- `finagle-core`: Add Stack#remove
- `finagle-core`: Add a copy constructor to Stack{Client, Server}
- `finagle-core`: Fixed a typo in scaladoc https://github.com/twitter/finagle/pull/264
- `finagle-core`: Implement ClientBuilder in terms of StackClient
- `finagle-core`: Invert the `cancelOnHangup` value passed to MaskCancelFilter.Param
- `finagle-core`: Liberate Failure
- `finagle-core`: Log all services loaded by c.t.finagle.util.LoadService
- `finagle-core`: Minor c.t.app.ClassPath/c.t.f.util.LoadService cleanup
- `finagle-core`: Properly close sockets on shutdown
- `finagle-core`: Properly scope stats by label in Stack{Client,Server}
- `finagle-core`: Remove `Stack{Server,Client}.transformed`
- `finagle-core`: Scoped the RollupStatsReceiver carefully
- `finagle-core`: Thread through Codec#newClientTransport in ClientBuilder
- `finagle-core`: Update to netty-3.9.1.Final
- `finagle-example`: Add Java Thrift client and server
- `finagle-http`: Add Csv,Xls,Zip to finagle MediaType
- `finagle-http`: Adds tls support to finagle 6 apis
- `finagle-http`: Set the response content-length header to 0 in ExceptionFilter.
- `finagle-kestrel`: Add Thrift support to Kestrel MultiReader in Finagle-Kestrel
- `finagle-mux`: Cleaned up build information
- `finagle-mux`: GC Avoidance primitives
- `finagle-mux`: Move exp.MuxClient and exp.MuxServer
- `finagle-mux`: Record tracing info when Mux is enabled
- `finagle-mux`: Refactor Session to make closing a Session uniform
- `finagle-mux`: Render mux clients leasable
- `finagle-redis`: Added support for redis MOVE command.
- `finagle-serversets`: Reduce the number of intermediate datastructures
- `finagle-thriftmux`: Add ThriftMux.withClientId
- `finagle-thriftmux`: Maintain legacy client and server names
- `finagle-{core,thrift,mux}`: Clean up contexts, delimit Locals
6.15.0
-------
- `finagle-core`: Fixed DefaultClient to use the base close method
- `finagle-core`: Fix a race condition when closing in DefaultServer
- `finagle-serversets`: memoize path parses in ServerSet2
- `finagle-mux`: remove references to org.jboss.netty.util.CharsetUtil
- `finagle-http`: create HttpTransport in codec
- `finagle-http`: fix basic authentication with special characters
- `finagle-http`: temporary fix for prematurely expiring streaming responses
- `finagle-core`: don't discard outstanding readq elements in ChannelTransport
- `finagle-core`: Add Socks Proxy Authentication support
- `finagle-doc`: fix image size in client stack figure.
- `finagle-stats`: unregister cumulative gauges when all references have been collected
- `finagle-core`: fix truncation in ChannelBufferBuf#slice()
- `finagle-stats`: upgrade to the latest version of metrics
- `finagle-stats`: Enable cumulative gauges in MetricsStatsReceiver
- `finagle-mysql`: Move mysql testing out of finagle-mysql
- `finagle-serversets`: serverset namer - synthesize nodes for each endpoint
- `finagle-http`: fix HttpClientDispatcher
- `finagle-core`: transport should be considered closed if it is failed
- `finagle-core`: Improve the failure for cancelled requests in the ClientDispatcher
- `finagle-core`: LocalScheduler - add LIFO option
- `finagle-core`: don't join after interrupt in Exitguard.Unguard()
- `finagle-serversets`: Replaces Op with Activity Problem
- `finagle-mysql`: implement builder using StackClient.
- `finagle-core`: Make LoadService not fail if a sub-dir is not readable
- `finagle-core`: Make com.twitter.finagle.Name an ADT
- `finagle-core`: curry `newDispatcher` in Stack{Client, Server}
- `finagle-thriftmux`: Add a flag for enabling ThriftMux
- `finagle-doc`: improved rastering of logos
- `finagle-core`: Retry on com.twitter.util.TimeoutException
- `finagle-core`: introduce ForkJoinScheduler
- `finagle-serversets`: facade for ZooKeeper libraries
6.14.0
-------
- `finagle-*`: Add com.twitter.io.Charsets and replace the use of org.jboss.netty.util.CharsetUtil
- `finagle-benchmark`: Fix caliper failures due to new guava
- `finagle-core`: Disable Monitor usage of in Netty3Listener
- `finagle-core`: Enforce usage of c.t.finagle.util.DefaultLogger
- `finagle-core`: Fix a Netty3Timer capitalization bug
- `finagle-core`: Fixed unresolved promises in client dispatcher
- `finagle-core`: Implement ServerBuilder in terms of StackServer.
- `finagle-core`: Introduce 2-level caching in the name interpreter
- `finagle-core`: Introduce Failure interface (internally)
- `finagle-core`: Introduce StackServer
- `finagle-core`: Introduce a flag for debug tracing
- `finagle-core`: Make StackClient symmetric to StackServer
- `finagle-core`: Parse names into trees; introduce separate evaluation.
- `finagle-core`: Remove redundant Netty3Timer param def
- `finagle-core`: Resolver.resolve throws IllegalArgumentException on logical name
- `finagle-core`: RetryPolicy filter, limit, combine
- `finagle-core`: Thread through NullReporterFactory in ServerBuilder.
- `finagle-core`: Use DefaultLoadBalancerFactory
- `finagle-core`: Use JDK6-friendly RuntimeException constructor in Failure
- `finagle-doc`: README refresh
- `finagle-doc`: Refresh client stack docs
- `finagle-memcached`: Ketama memcache: accept weighted addresses
- `finagle-mux`: Add server-side Stack wiring for Mux and ThriftMux
- `finagle-mysql`: Proper prepared statement support.
- `finagle-serversets`: Add Read-Only ZK support to zk2 Resolver
- `finagle-serversets`: Zk2: deliver events serially in their own thread
- `finagle-thrift`: workaround libthrift TBinaryProtocol.writeBinary bug
- `finagle-zipkin`: Include service name in all traces
6.13.1
~~~~~~~
- `finagle-core`: Case insensitive Dtab headers in HTTP codec
- `finagle-core`: Introduce Stack.Params#contains
- `finagle-docs`: address small style nits
- `finagle-http`: support reading params in content body for HTTP methods other than POST and PUT
- `finagle-memcached`: add ketamaclient initial readiness before the first request
- `finagle-serversets`: Disable retry behavior but turn exception into negative resolution.
- `finagle-serversets`: Stabilizer: don't consider Pending update successful
- `finagle-stats`: use java.lang.Double in addGauge()
- `finagle`: Add `cause` Throwables for all ConnectionFailedExceptions
- `finagle`: Fix Travis-CI integration.
- `finagle`: Swap Stack.Node and Stack.Leaf args in toString formatting
- `finagle`: Update 3rdparty library versions
- `finagle`: Upgrade birdcage to guava 16
- `finagle`: upgrade ostrich to 9.4.2
- `finagle`: upgrade util to 6.13.2
6.13.0
~~~~~~
- `finagle-core`: ForkJoin scheduler: first draft
- `finagle-doc`: Update URL to Finagle blog post. Motivation: Outdated URL
- `finagle-http`: compress text-like content-types by default
- `finagle-memcached`: Mark test "not migrating yet" as flaky
- `finagle-mux`: don't delegate empty dtabs
- `finagle-mysql`: Better failure handling for the dispatcher
- `finagle-ostrich4`: Make OstrichExporter compatible with Ostrich CommandHandler.
- `finagle-redis`: Add SINTER command to redis client
- `finagle-redis`: Allow an empty string as a hash field value
- `finagle-redis`: Fixed the empty string issue of MBULK_REPLY
- `finagle-serverset`: ServerSets2: reset value on SyncConnected
- `finagle-stats`: Upgrade metrics dependency to the latest version.
- `finagle-thrift`: Do not rely on ThreadLocal'd ClientIds in TTwitterFilter
- `finagle-thrift[mux]`: Reintroduce ClientIdContext by default
- `finagle-zipkin`: TraceId invariance
- `finagle/S2`: introduce address stabilization, stats
- `finagle`: Add Mux and ThriftMux Clients based on com.twitter.finagle.Stack
- `finagle`: fix dependency problem with multiple version of serversets
- `finagle`: Fix the sbt doc generation (and tests)
- `finagle`: upgrade Netty to 3.8.1
- `finagle`: upgrade ostrich to version 9.4.0
- `finagle`: upgrade util to version 6.13.0
6.12.2
~~~~~~
- `finagle`: release scrooge version 3.12.3
- `finagle-exception`: Drop scrooge in favor of pre-generated Thrift Java source code.
- `finagle-zipkin`: Drop scrooge in favor of pre-generated Thrift Java source code.
6.12.1
~~~~~~
- `finagle`: release ostrich version 9.3.1
- `finagle`: release util version 6.12.1
- `finagle`: Upgrade everyone to the new c.t.common.server-set
6.12.0
~~~~~~
- `finagle-core`: Add a `ServerBuilder.safeBuild(ServiceFactory)` method for Java compatibility
- `finagle-core`: Add basic Scaladocs for all Filters and Services
- `finagle-core`: close Name Var observation on service close
- `finagle-core`: com.twitter.finagle.Stack: initial version
- `finagle-core`: Fix race condition in server dispatcher draining state machine
- `finagle-core`: low hanging fruit
- `finagle-core`: Make `Resolver.evalLabeled` private[finagle]
- `finagle-core`: Option to enable thread pool scheduler in finagle"
- `finagle-core`: Record Finagle version in tracing information
- `finagle-core`: Remove a long-forgotten java file
- `finagle-core`: Separate stats scopes for service-creation and request failure
- `finagle-core`: TimeoutFactorySpec => TimeoutFactoryTest
- `finagle-core`: Users don't get NPE on directories without permissions
- `finagle-core`: Weights, weighted load balancer, memoization
- `finagle-core`: Write `Throwables.mkString` in terms of ArrayBuffer instead of Seq
- `finagle-doc`: How do I change my timeouts in the Finagle 6 APIs?
- `finagle-example`: Port finagle-example thrift to new style APIs
- `finagle-http`: Add Dtab filter in RichHttp
- `finagle-http`: enable tracing on finagle 6 http api
- `finagle-kestrel`: Fix match-exhaustiveness issue in `DecodingToResponse.parseResponse`
- `finagle-kestrel`: Use Var[Addr] as underlying cluster representation
- `finagle-memcache`: Add a parameter to disable host ejection from KetamaFailureAccrualFilter
- `finagle-memcached`: include response type for IllegalStateException
- `finagle-mux`: Adds lease support to mux clients
- `finagle-mysql`: Embeddable MySql support for Unit/Integration Testing in Finagle-MySql
- `finagle-serversets`: prevent MatchError when resolving zk path + endpoint
- `finagle-serversets`: Use ephemeral ports and `Var.sample` in tests
- `finagle-serversets`: Use the watch method instead of the now deprecated monitor method
- `finagle-tracing` /zipkin: remove some allocations
- `finagle`: update dependencies com.twitter.common*
- `finagle`: update ostrich to 9.3.0
- `finagle`: update util to 6.12.0
- `finagle`: Use a more descriptive message for when client name resolution is negative
6.11.1
~~~~~~
- `finagle-core`: Masks cancellation on PipeliningDispatcher
- `finagle-doc`: Fix finagle-websocket link on Finagle docs website.
- `finagle-http`: Http client dispatcher
- `finagle-kestrel`: Add abort command to kestrel client
6.11.0
~~~~~~
- `finagle-core`: Add a "tries" scoped StatsFilter to ClientBuilder.
- `finagle-core`: Allow clean shutdown for insoluble address in DelayedFactory.
- `finagle-core`: Better exception message for resolver not found issue.
- `finagle-core`: Introduce P2CLB: O(1), fair-weighted, concurrent load balancer
- `finagle-core`: Refactor dispatchers.
- `finagle-core`: Set interest ops when reading in ChannelTransport.
- `finagle-core`: Skip hostStatsReceiver rollup if it's null in DefaultClient.
- `finagle-core`: Untyped ChannelTransports.
- `finagle-example`: Use new `request.headers()` Netty API.
- `finagle-http`: Proper streaming dispatch.
- `finagle-kestrel`: Make ReadHandle an abstract class for better Java compatibility.
- `finagle-serversets`: Fix com.twitter.common.zookeeper.server-set dependency discrepancy.
- `finagle-serversets`: Introduce ServerSet2.
- `finagle-serversets`: Weight/priority vectors in ServerSet2.
- `finagle-stream`: Use dispatch logic.
- `finagle-stress`: Use BridgedThreadPoolScheduler.
- `finagle-thrift`: Add TFinagleBinaryProtocol
- `finagle-thriftmux`: Drop dependency on finagle-ostrich4.
- `finagle-thriftmux`: Remove scrooge2 dependency.
- `finagle`: Use Future.before.
- `finagle`: adds a section to the FAQ explaining the com.twitter.common situation.
- `finagle`: s/setValue(())/setDone()/g
6.10.0
~~~~~~
- `finagle-core`: Fix ServiceTimeoutException naming.
- `finagle-core`: Increase default tcpConnectTimeout to 350ms.
- `finagle-core`: Remove memory leak for never satisfied promises in DelayedFactory.
- `finagle-memcached`: Add ClientBuilder APIs that use Name instead of Group.
- `finagle`: Daemonize threads in ClientBuilders used in finagle.
6.9.0
~~~~~
- `finagle-core`: Avoid creating a new 'NoStacktrace' array for each exception.
- `finagle-core`: Better support for negative Addr resolution in StabilizingAddr.
- `finagle-core`: Make Dtab.base changeable.
- `finagle-core`: Move mask cancel filter over to Future#mask.
- `finagle-exp`: New warmup filter.
- `finagle-ostrich4`: Deprecate Netty methods.
- `finagle-serversets`: Better handling of permission exceptions in ZkResolver.
- `finagle-testers`: Small latency evaluation framework.
- `finagle`: Adhere to scala 2.10 pattern matching strictness.
6.8.1
~~~~~
- `finagle`: Upgrade ostrich to 9.2.1
- `finagle`: Upgarde util to 6.8.1
- `finagle`: Upgarde scrooge to 3.11.1
6.8.0
~~~~~
- `finagle-serversets`: Higher fidelity addrs from ZK We do the best we can with the current server set implementation.
- `finagle-mysql`: better type support
- `finagle-http`: Allow Integer to extract negative number
- `finagle-redis`: Decode nested multi-bulk replies
- `finagle-redis`: Allow expirations in the past
- `finagle-core`: bump Netty to 3.8.0.Final
- `finagle`: Return empty string when resolving an unlabeled address
- `finagle`: Don't re-scope StatsReceivers per request failure
- `finagle-thrift`: Unconditionally set TraceId and ClientId on servers
- `finagle-core`: Take -com.twitter.server.serversetZkHosts flag (for tunnelling)
- `finagle-native`: tomcat-native-1.1.27
- `finagle-mysql`: fix readLengthCodedBinary to read longs
- `finagle-testers`: library for integration testing of finagle services
- `finagle`: scaladoc warning cleanup
- `finagle-doc`: documented all of the stats in finagle-core
- `finagle-serversets`: bump server-set dependency to 1.0.56
- `finagle-stats`: adds a cautious registration to HttpMuxer / adds a default metrics endpoint to twitter-server