...likely client has closed socket...

[mosto...@gmail.com]

Hi

Using zookeeper 3.5.3-beta we are getting a few log lines like:
   [2017-07-14 13:02:30,588] WARN Unable to read additional data from
   client sessionid 0xc00bee319ed0004, likely client has closed socket
   (org.apache.zookeeper.server.NIOServerCnxn)

Why zookeeper is "reading" adittional data from client if it already 
leave? Anyway, it the client is gone this shoudn't be considered an 
error, isnt it?

Otherwise shouldn't this message be DEBUG?

Can we safely ignore org.apache.zookeeper.server.NIOServerCnxn? (or this 
could hide severe issues in the future?)

Regards