On 7/14/2017 5:14 AM, [email protected] wrote: > 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?
I'm no expert in ZK code, so I could be completely wrong in what I'm going to say: This kind of message probably means that the normal TCP stack operation (where a client will notify a server that it is closing the socket) was somehow interrupted, possibly by a badly configured firewall or a network problem. There is always the possibility of a bug, but it is more likely to be a problem somewhere else. I do not believe that this is a message that can be ignored -- it probably indicates the presence of a real problem that must be fixed. If I'm wrong, hopefully someone who IS an expert will step up and correct me. Thanks, Shawn
