void closeAndReleaseChild(Channel childChannel) {
    childChannel.close();
    NettyUtils.doInEventLoop(parentChannel.eventLoop(), () -> {
      streamChannels.remove(childChannel.id());
      releaseClaim();
    });
  }
Delivers the exception to all registered child channels, and prohibits new streams being created on this connection.
ambry-network/src/main/java/com/github/ambry/network/http2/MultiplexedChannelRecord.java