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From Joe Lerner <joeler...@gmail.com>
Subject Warnings in Zookeeper Server Logs
Date Fri, 04 Jan 2019 21:18:29 GMT
Hi (yes again):

We have a simple architecture: 2 SOLR Cloud servers (on servers #1 and #2),
and 3 zookeeper instances (on servers #1, #2, and #3). Things appear to work
fine, and I have confirmed that our basic configuration is correct. But we
are seeing TONS of the following warnings in all of our zookeeper server
logs:

2019-01-04 14:48:04,266 [myid:1] - INFO 
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@192] -
Accepted socket connection from /XXX.YY.ZZZ.46:51516
2019-01-04 14:48:04,266 [myid:1] - WARN 
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@368] - caught end
of stream exception
EndOfStreamException: Unable to read additional data from client sessionid
0x0, likely client has closed socket
        at
org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:239)
        at
org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)
        at java.lang.Thread.run(Thread.java:748)
2019-01-04 14:48:04,266 [myid:1] - INFO 
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1044] - Closed
socket connection for client /XXX.YY.ZZZ.46:51516 (no session established
for client)


These messages seem to correspond to similar message we are seeing in the
application client-side logs. (I don’t see any messages that would indicate
Too many connections.) 

Reading the log content, it seems to be saying that a connection is
accepted, but then there is an "end of stream" exception. But our users are
not experiencing any problems--they are searching SOLR like crazy.

Any suggestions?

Thanks!

Joe





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