Why channel.write blocked if I block messageReceived on same channel?

[man4j]

1. If I block in method messageReceived (f.e. Thread.sleep or breakpoint)
then channel.write(in separate thread) only put data in queue, but not send
via socket until messageReceived still blocked. Why?

2. channel.write is thread-safe?

Thanks!
-- 
View this message in context: http://netty-forums-and-mailing-lists.685743.n2.nabble.com/Why-channel-write-blocked-if-I-block-messageReceived-on-same-channel-tp5441049p5441049.html
Sent from the Netty User Group mailing list archive at Nabble.com.