gRPC Java v1.11.0 Released

[Eric Anderson]

gRPC Java 1.11.0 is now released and availalbe on Maven Central.

v1.12.0 is scheduled for May 7th.

I'd like to thank these contributors to this release:

Carmi Grushko, Jiangtao Li, Nicholas DiPiazza, Paul Jensen, Rama Chavali, Ryan Michela, Shohei Kamimori, Snow Pettersen

Dependencies

• Guava version bumped to 20. It is not possible to use older versions of Guava with this version of gRPC. If this proves difficult to handle, please file an issue
• netty: Netty version bumped to 4.1.22-Final. netty-tcnative 2.0.7.Final is still compatible

API changes

• core: ManagedChannelBuilder.usePlaintext(boolean) is now deprecated. Use usePlaintext(void) instead, which is equivalent to usePlaintext(true). usePlaintext(false) was almost always a bug, but is still available by specifying NegotiationType.PLAINTEXT_UPGRADE to NettyChannelBuilder
• bazel: grpc-java's Bazel workspace name was renamed to io_grpc_grpc_java. This was done to make the name more unique, since Bazel is now enforcing that users use the same name as in our workspace

New Features

• core: Added ManagedChannel.enterIdle(). It gracefully shuts down any existing connections. This can have multiple uses, but is most immediately useful to allows smooth network interface changes on Android (#3688 #4179)
• core: Added toString() to MethodDescriptor and ServiceDescriptor (#4013)
• inprocess: Added InProcessServerBuilder.generateName(). This is a convenience for making a name instead of manually with UUID or similar
• okhttp: Support for Conscrypt security provider. This allows you to include Conscrypt with your app and not depend on the OS nor Google Play Services Dynamic Security Provider for TLS support
• inprocess: Added InProcessChannelBuilder.scheduledExecutorService(exec) to override the default timer executor used by gRPC
• okhttp: Added OkHttpChannelBuilder.scheduledExecutorService(exec) to override the default timer executor used by gRPC
• protobuf: Added StatusProto.fromStatusAndTrailers() to convert to a com.google.rpc.Statusdirectly from a io.grpc.Status (instead of a Status*Exception)
• alts: Added ALTS transport for Google Cloud Platform usage. It is similar to mutually authenticated TLS but with different protocol and trust model. ALTS is currently only available for whitelisted projects
• cronet: Added API to apply TrafficStats tag and UID to Cronet GRPC channels (#4208)

Behavior changes

• core: ManagedChannel will now log when orphaned without proper shutdown (#4093)
• core: Use exponential backoff for name resolution. After a NameResolver calls onError(), the channel will now automatically call refresh() after a delay. This replaced the hard-coded 60-second retry timer in the DNS name resolver. (#4105)
• core: Added an internal panic mode for ManagedChannel. If the channel notices an internal uncaught exception it will attempt to put the channel into a permanent TRANSIENT_FAILURE state instead of hanging (#4023)
• core: Servers that send too many or too few responses for a unary call will now properly see ServerCall.Listener.onCancel() called instead of onComplete(). The client will now see a cancellation instead of an explicit status message (#3819)
• grpclb: Enter fallback mode immediately when balancer and all backend connections are lost (#4007)

Bug fixes

• Reduce false positive results of grpc/grpc-java-api-checker
• core: Close InputStream returned by Marshallers for outgoing messages (#3419)
• core: Fixed channel.getState(true) will not reconnect (#4170)
• netty: Include more details for closure of unknown reason
• netty: Client sends rst stream when server half-closes. This fixes a memory leak when server closes before client half closes (#4275)
• netty: Fixed ProxySelector with Netty. This should finally enable the use of forward proxies that require authentication. Users should be able to migrate from GRPC_PROXY_EXP to -Dhttps.proxyHost at this time (#4137)
• okhttp: Fixed HPACK reader bug. This resolves an incompatibility with nginx (#4277)

Documentation

• examples: Added a "hello-world" with TLS configured