Why pipeline content to command nc won't work?

[刘明敏]

I try to get zookeeper stat from shell by using nc,

This works: call nc localhost 2181 first, then type in: *stat*.

while echo "stat" | nc localhost 2181 returns Nothing.

Any idea why it doesn't work?

Thanks ;-)

-- 
Best Regards

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刘明敏 | mmLiu