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From Anup Tiwari <anup.tiw...@games24x7.com>
Subject Unable to connect Tableau 9.2 to Drill cluster using zookeeper quorum
Date Thu, 01 Dec 2016 13:01:09 GMT
Hi Team,

I am trying to connect to my drill cluster from tableau using MapR Drill
ODBC Driver.

I followed steps given in
https://drill.apache.org/docs/using-apache-drill-with-tableau-9-server/ and
subsequent links and successfully connected to individual "direct drillbit"
reading docs. But when i am trying to connect to "zookeeper quorum" instead
of "direct drillbit", i am getting below error on MapR interface :

FAILED!
[MapR][Drill] (1010) Error occurred while trying to connect: [MapR][Drill]
(20) The hostname of '10.x.x.x' cannot be resolved. Please check your DNS
setup or connect directly to Drillbit.

Please note that since i am giving directly IP(Drill Hosts which are on
AWS) so i believe i don't have to maintain DNS entries in host file.

Also corresponding zookeeper logs are as follows :-

2016-12-01 18:08:42,541 [myid:3] - INFO  [NIOServerCxn.Factory:
0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory@192] - Accepted socket connection
from /192.*.*.*:53159
2016-12-01 18:08:42,543 [myid:3] - WARN  [NIOServerCxn.Factory:
0.0.0.0/0.0.0.0:2181:ZooKeeperServer@854] - Connection request from old
client /192.*.*.*:53159; will be dropped if server is in r-o mode
2016-12-01 18:08:42,543 [myid:3] - INFO  [NIOServerCxn.Factory:
0.0.0.0/0.0.0.0:2181:ZooKeeperServer@900] - Client attempting to establish
new session at /192.*.*.*:53159
2016-12-01 18:08:42,546 [myid:3] - INFO
[CommitProcessor:3:ZooKeeperServer@645] - Established session
0x358ba2951720006 with negotiated timeout 30000 for client /192.*.*.*:53159
2016-12-01 18:08:42,793 [myid:3] - WARN  [NIOServerCxn.Factory:
0.0.0.0/0.0.0.0:2181:NIOServerCnxn@357] - caught end of stream exception
EndOfStreamException: Unable to read additional data from client sessionid
0x358ba2951720006, likely client has closed socket
    at
org.apache.zookeeper.server.NIOServerCnxn.doIO(NIOServerCnxn.java:230)
    at
org.apache.zookeeper.server.NIOServerCnxnFactory.run(NIOServerCnxnFactory.java:203)
    at java.lang.Thread.run(Thread.java:745)
2016-12-01 18:08:42,794 [myid:3] - INFO  [NIOServerCxn.Factory:
0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1008] - Closed socket connection for
client /192.*.*.*:53159 which had sessionid 0x358ba2951720006
2016-12-01 18:08:42,795 [myid:3] - ERROR
[CommitProcessor:3:NIOServerCnxn@178] - Unexpected Exception:
java.nio.channels.CancelledKeyException
    at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:73)
    at sun.nio.ch.SelectionKeyImpl.interestOps(SelectionKeyImpl.java:77)
    at
org.apache.zookeeper.server.NIOServerCnxn.sendBuffer(NIOServerCnxn.java:151)
    at
org.apache.zookeeper.server.NIOServerCnxn.sendResponse(NIOServerCnxn.java:1082)
    at
org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:404)
    at
org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:77)


I have gone through this link but this doesn't helped me :-
http://stackoverflow.com/questions/30940981/zookeeper-error-cannot-open-channel-to-x-at-election-address

Regards,
*Anup Tiwari*

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