Missing iterator() implementation in AbstractHttp2Headers

[bswami50]

Hi,

This looks like a different flavor of an earlier issue. The iterator method used here seems to be unimplemented here

Is it possible to provide a fix or workaround for this?

What version of gRPC-Java are you using?

Using grpc-netty-1.30.2 with Netty 4.1.104.Final.

What is your environment?

Linux

What did you expect to see?

No failures on upgrade from Netty 4.1.100.Final

What did you see instead?

Crash with stack trace as below

Steps to reproduce the bug

io.grpc.StatusRuntimeException: UNKNOWN
#011at io.grpc.stub.ClientCalls.toStatusRuntimeException(Unknown Source) ~[grpc-stub-1.30.2.jar:?]
#011at io.grpc.stub.ClientCalls.getUnchecked(Unknown Source) ~[grpc-stub-1.30.2.jar:?]
#011at io.grpc.stub.ClientCalls.blockingUnaryCall(Unknown Source) ~[grpc-stub-1.30.2.jar:?]
// application code redacted
#011at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]
#011at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]
#011at java.lang.Thread.run(Thread.java:829) [?:?]
Caused by: java.lang.UnsupportedOperationException
#011at io.grpc.netty.AbstractHttp2Headers.iterator(Unknown Source) ~[grpc-netty-1.30.2.jar:?]
#011at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder$FrameReadListener.onHeadersRead(DefaultHttp2ConnectionDecoder.java:425) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder$FrameReadListener.onHeadersRead(DefaultHttp2ConnectionDecoder.java:352) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.Http2InboundFrameLogger$1.onHeadersRead(Http2InboundFrameLogger.java:56) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.DefaultHttp2FrameReader$2.processFragment(DefaultHttp2FrameReader.java:476) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.DefaultHttp2FrameReader.readHeadersFrame(DefaultHttp2FrameReader.java:484) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.DefaultHttp2FrameReader.processPayloadState(DefaultHttp2FrameReader.java:253) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.DefaultHttp2FrameReader.readFrame(DefaultHttp2FrameReader.java:159) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.Http2InboundFrameLogger.readFrame(Http2InboundFrameLogger.java:41) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.DefaultHttp2ConnectionDecoder.decodeFrame(DefaultHttp2ConnectionDecoder.java:188) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.Http2ConnectionHandler$FrameDecoder.decode(Http2ConnectionHandler.java:393) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.http2.Http2ConnectionHandler.decode(Http2ConnectionHandler.java:453) ~[netty-codec-http2-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:529) ~[netty-codec-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:468) ~[netty-codec-4.1.jar:4.1.104.Final]
#011at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:290) ~[netty-codec-4.1.jar:4.1.104.Final]
#011at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:444) ~[netty-transport-4.1.jar:4.1.104.Final]
#011at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.jar:4.1.104.Final]
#011at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:412) ~[netty-transport-4.1.jar:4.1.104.Final]
#011at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1410) ~[netty-transport-4.1.jar:4.1.104.Final]
#011at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:440) ~[netty-transport-4.1.jar:4.1.104.Final]
#011at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:420) ~[netty-transport-4.1.jar:4.1.104.Final]
#011at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:919) ~[netty-transport-4.1.jar:4.1.104.Final]
#011at io.netty.channel.epoll.AbstractEpollStreamChannel$EpollStreamUnsafe.epollInReady(AbstractEpollStreamChannel.java:800) ~[netty-transport-classes-epoll-4.1.jar:4.1.104.Final]
#011at io.netty.channel.epoll.EpollDomainSocketChannel$EpollDomainUnsafe.epollInReady(EpollDomainSocketChannel.java:140) ~[netty-transport-classes-epoll-4.1.jar:4.1.104.Final]
#011at io.netty.channel.epoll.EpollEventLoop.processReady(EpollEventLoop.java:509) ~[netty-transport-classes-epoll-4.1.jar:4.1.104.Final]
#011at io.netty.channel.epoll.EpollEventLoop.run(EpollEventLoop.java:407) ~[netty-transport-classes-epoll-4.1.jar:4.1.104.Final]
#011at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:997) ~[netty-common-4.1.jar:4.1.104.Final]
#011at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.jar:4.1.104.Final]
#011at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.jar:4.1.104.Final]

[idelpivnitskiy]

@bswami50 this method was implemented in #9979 and included in v1.55.1 or above

[bswami50]

Thanks for the pointer. Feel free to close this issue.