Play 2.5.0 uses Netty 4.0.33, while gRPC requires Netty 4.1.0 (for http2 support), which causes the following exception:
[error] p.c.s.n.PlayRequestHandler - Exception caught in Netty
java.lang.AbstractMethodError: null
at io.netty.util.ReferenceCountUtil.touch(ReferenceCountUtil.java:73)
at io.netty.channel.DefaultChannelPipeline.touch(DefaultChannelPipeline.java:84)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:154)
at com.typesafe.netty.http.HttpStreamsHandler.channelRead(HttpStreamsHandler.java:131)
at com.typesafe.netty.http.HttpStreamsServerHandler.channelRead(HttpStreamsServerHandler.java:96)
at io.netty.channel.ChannelHandlerInvokerUtil.invokeChannelReadNow(ChannelHandlerInvokerUtil.java:83)
at io.netty.channel.DefaultChannelHandlerInvoker.invokeChannelRead(DefaultChannelHandlerInvoker.java:154)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:154)
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
at io.netty.channel.ChannelHandlerInvokerUtil.invokeChannelReadNow(ChannelHandlerInvokerUtil.java:83)
[error] p.c.s.n.PlayRequestHandler - Exception caught in Netty
java.util.NoSuchElementException: http-handler-body-publisher
at io.netty.channel.DefaultChannelPipeline.getContextOrDie(DefaultChannelPipeline.java:1050)
at io.netty.channel.DefaultChannelPipeline.remove(DefaultChannelPipeline.java:379)
at com.typesafe.netty.http.HttpStreamsHandler.handleReadHttpContent(HttpStreamsHandler.java:191)
at com.typesafe.netty.http.HttpStreamsHandler.channelRead(HttpStreamsHandler.java:167)
at com.typesafe.netty.http.HttpStreamsServerHandler.channelRead(HttpStreamsServerHandler.java:96)
at io.netty.channel.ChannelHandlerInvokerUtil.invokeChannelReadNow(ChannelHandlerInvokerUtil.java:83)
at io.netty.channel.DefaultChannelHandlerInvoker.invokeChannelRead(DefaultChannelHandlerInvoker.java:154)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:154)
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:103)
at io.netty.channel.ChannelHandlerInvokerUtil.invokeChannelReadNow(ChannelHandlerInvokerUtil.java:83)
After I remove all gRPC codes, it works again.
Is there any quick fix that I can try now? Thanks!