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NPE in HttpSessionHandler.channelInactive with JRE11

See original GitHub issue

The following issue is reproduced on latest armeria (0.90.x) with openjdk 11.0.2 when the remote server requires a downgrade from HTTP2 to H1C :

java.lang.NullPointerException: remoteAddress
	at io.netty.util.internal.ObjectUtil.checkNotNull(ObjectUtil.java:33)
	at io.netty.bootstrap.Bootstrap.connect(Bootstrap.java:141)
	at com.linecorp.armeria.client.HttpChannelPool.connect(HttpChannelPool.java:347)
	at com.linecorp.armeria.client.HttpSessionHandler.channelInactive(HttpSessionHandler.java:306)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:257)
	at io.netty.channel.AbstractChannelHandlerContext.invokeChannelInactive(AbstractChannelHandlerContext.java:243)
	at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:236)
	at io.netty.handler.codec.ByteToMessageDecoder.channelInputClosed(ByteToMessageDecoder.java:393)
	at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:358)
	at io.netty.handler.codec.http2.Http2ConnectionHandler.channelInactive(Http2ConnectionHandler.java:415)

It appears that the Channel’s remoteAddress is not set. (requestedRemoteAddress is set though)

This cannot be reproduced e.g. with oracle 10.0.2 where remoteAddress = requestedRemoteAddress

It could be an issue with netty (interop with recent openJDKs) or with the way Armeria uses Netty.