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CHANGELOG.md

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v4.0.0

  • This major version upgrades all dependencies to the most recent working major version, including binary dependencies. This is a measure of last resort since the last version of v3 attempted to use a postinstall hook to install different versions of some binary dependencies so that a single version train would work for both old and new Node.js versions. This plan failed because some build systems would prune the versions installed by the postinstall hook.

v3.10.1

  • This is the first patch release after master diverged for release 4.0.0. This change reintroduces explicit versions of binary dependencies since the postinstall hook interfered with some build systems because these binary dependencies would be pruned.

v3.10.0

  • Now builds properly in versions of Node.js as old as 0.10 and as new as Node.js 12.

v3.9.12

  • Update depencencies to support Node.js 9 and newer.

v3.9.11

  • Bug Fix: Handles undefined default value in thrift response structs when a thrift exception occurs

v3.9.10

  • Improvement: Pass defaultAsUndefined flag to thriftrw to allow for undefined to be used as the default value in thrift structs

v3.9.9

  • Improvement: Add support for Node 4

v3.9.8

  • Improvement: Ensure that peer selection strategy does not fully connect to all peers in the peer list. This will reduce file descriptor usage and means each sub channel either has 1+(n incoming) connected peers or minConnection number of connected peers.

v3.9.7

  • Bug fix: Fix uncaught where wait for identifier is null.

v3.9.6

  • Bump thriftrw to 3.8.0

v3.9.4

  • Bug fix: Ensure that per-request timeout is respected in the connection init phase
  • Bug fix: Fix uncaught exception where there are no connections

v3.9.3

  • Check whether requests time out while waiting for connection identification.

v3.9.2

  • Refactor: move updatePeer and drainPeer up to TChannel level.

v3.9.1

  • Add option to pass pre-compiled thrift spec to TChannelAsThrift.

v3.9.0

  • Support per-client retry budget to avoid excessive retries overwhelming server.
  • Fixup benchmarks Makefile to work out of box.

v3.8.4, v3.8.5 (bugfix)

  • Improve the connection backoff logic.

v3.8.3

  • Adds the request object as an argument to isBusy(req).

v3.8.1, v3.8.2 (bugfix)

  • Adds an isUnhealthyError method to TChannel for use in throttling (client side rate limiting).

v3.8.0

  • Relaxes timeouts for streaming requests, so that a timeout will not apply until the last fragment of the request has been received.

v3.7.3

  • Adds a file watcher, for binding a TChannel subchannel's peer list to the contents of a file.

v3.7.1, v3.7.2

  • Adds support for baseAppHeaders in as/json and as/thrift.
  • Adds guards against common race condition in the lazy relay request object pool.

v3.7.0

  • Introduces the allowOptionalArguments flag for TChannelAsThrift, so services and clients can opt-in for the looser semantics for fields of Thrift argument structs that are not explicitly optional or required. Enabling this flag makes argument fields optional by default (they were formerly required by default, and optional was not possible to express). Consequently, existing IDL should change fields to required, or add null checks to existing request handlers.
  • Adds another guard to prevent a dangling reference to a reclaimed Lazy Relay Request from throwing an exception upon attempting to follow up with an error frame.

v3.6.24

  • Updated dependencies for compatibility with Node.js 4.
  • Changes the default for peer selection: now uses a heap to choose peers for outbound requests. This can be configured with the choosePeerWithHeap TChannel option.
  • Addresses a problem in lazy relay, which would read the response flags instead of the response code, confusing stats.
  • Adds support for tryConnect() on peers, with back-off.
  • Ensures a minimum number of connections for each peer. The intent is to eventually support a connections count goal.
  • Fixes a bug in the HTTP argument scheme regarding the Content-Length header.
  • Removes the special cases for the "self" peer. These interfaces have been removed. External usage of these private interfaces is not expected.
  • Numerous performance improvements, particularly using object pooling and lazy buffer slicing.

Hyperbahn:

  • Adds a Hyperbahn::discover method to the Hyperbahn client, suitable for querying available peers for a given service.
  • Now emits stats for error frames produced and forwarded.

Thrift:

  • Relaxes the constraint that application exeptions in the Thrift arg scheme must be instances of the JavaScript Error base type.
  • The Thrift argument scheme instance now exposes a getServiceEndpoints method for introspecting methods.
  • ThriftRW upgraded to version 3.4.3, capturing fixes for lists of lists, and maps with integer keys, and adds support for the i8 alias for the byte type.

v3.6.3

  • Added consistent host port validation in listen(), connect(), and init handshake
  • Added support for thrift includes under tchannel-as-thrift
  • Added protection against TCP socket being full
  • Added TChannel library version init headers
  • Added stricter host:port validation for both incoming and outgoing connections
  • Add logging around several edge cases including
    • unknown error frames
    • unknown call responses
  • Improved and fixed timeout handling
  • Reduced number of production dependencies
  • Fixed a server-side double response bug
  • Fixed the tracing RNG to be xorshift128 rather than a naive LCG
  • Fixed a uncaught exception under TChannelJSON request sending
  • Fixed a streaming bug in as/http
  • Fixed retries to work around dead hosts
  • Several edge case bug fixes
  • Several other leaks fixed
  • Several performance improvements

v3.5.23

  • This change significantly reduces the weight of buffers latent on the heap by using a shared 64KB buffer instead of one intermediate buffer for each frame.
  • Adds Peer#toString() and Peer#inspect()
  • Fixes Peer#connectTo() such that it returns a Connection.
  • Adds a missing TChannel#setWriteBufferMode(mode) method to retain backward-compatibility with dependees that still need it.

v3.5.19

  • Adds support for channel, peer, and connection draining.
  • Introduces lazy relaying, allowing Hyperbahn to read and write small parts of protocol frames without creating and collecting unnecessary complete request and response object graphs. This feature is deployed experimentally and enabled by a flag.

as=thrift

  • Supports Meta::health and Meta::thriftIDL endpoints for TChannelAsThrift.
  • Surfaces TchannelAsThrift#waitForIdentified to consumers.
  • Adds HyperbahnClient#getThriftSync({serviceName, thriftFile}).

as=http

  • Fixes getHeaders and setHeaders methods for the HTTP argument scheme with regard to redundant keys.

v3.0.0

See [MIGRATION.md][]