Hello,
I did a rolling upgrade of the Zookeeper from 3.4.14 to 3.5.6 on 23rd in
my Test-Environment. It's zookeeping a three node Kafka-Cluster running
on 2.3.0.
After the update I get spammed with these warnings:
Oct 25 10:56:23 zookeeper_node_1: 2019-10-24 21:56:23,119 [myid:1] -
WARN [NIOWorkerThread-6:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:23 zookeeper_node_2: 2019-10-24 21:56:23,478 [myid:2] -
WARN [NIOWorkerThread-1:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:23 zookeeper_node_3: 2019-10-24 21:56:23,531 [myid:3] -
WARN [NIOWorkerThread-3:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:23 zookeeper_node_1: 2019-10-24 21:56:23,776 [myid:1] -
WARN [NIOWorkerThread-8:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:23 zookeeper_node_2: 2019-10-24 21:56:23,879 [myid:2] -
WARN [NIOWorkerThread-5:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:24 zookeeper_node_3: 2019-10-24 21:56:24,086 [myid:3] -
WARN [NIOWorkerThread-4:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:24 zookeeper_node_1: 2019-10-24 21:56:24,090 [myid:1] -
WARN [NIOWorkerThread-4:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:24 zookeeper_node_2: 2019-10-24 21:56:24,497 [myid:2] -
WARN [NIOWorkerThread-2:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:24 zookeeper_node_3: 2019-10-24 21:56:24,601 [myid:3] -
WARN [NIOWorkerThread-1:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:24 zookeeper_node_1: 2019-10-24 21:56:24,798 [myid:1] -
WARN [NIOWorkerThread-3:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:24 zookeeper_node_3: 2019-10-24 21:56:24,904 [myid:3] -
WARN [NIOWorkerThread-6:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:25 zookeeper_node_2: 2019-10-24 21:56:25,007 [myid:2] -
WARN [NIOWorkerThread-3:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:25 zookeeper_node_1: 2019-10-24 21:56:25,260 [myid:1] -
WARN [NIOWorkerThread-5:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:25 zookeeper_node_3: 2019-10-24 21:56:25,467 [myid:3] -
WARN [NIOWorkerThread-8:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:25 zookeeper_node_2: 2019-10-24 21:56:25,619 [myid:2] -
WARN [NIOWorkerThread-8:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:25 zookeeper_node_1: 2019-10-24 21:56:25,666 [myid:1] -
WARN [NIOWorkerThread-7:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:26 zookeeper_node_3: 2019-10-24 21:56:25,923 [myid:3] -
WARN [NIOWorkerThread-5:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:26 zookeeper_node_2: 2019-10-24 21:56:26,178 [myid:2] -
WARN [NIOWorkerThread-5:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:26 zookeeper_node_1: 2019-10-24 21:56:26,329 [myid:1] -
WARN [NIOWorkerThread-1:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:26 zookeeper_node_3: 2019-10-24 21:56:26,484 [myid:3] -
WARN [NIOWorkerThread-3:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:26 zookeeper_node_2: 2019-10-24 21:56:26,792 [myid:2] -
WARN [NIOWorkerThread-4:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:26 zookeeper_node_3: 2019-10-24 21:56:26,890 [myid:3] -
WARN [NIOWorkerThread-7:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:26 zookeeper_node_1: 2019-10-24 21:56:26,888 [myid:1] -
WARN [NIOWorkerThread-2:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:27 zookeeper_node_2: 2019-10-24 21:56:27,347 [myid:2] -
WARN [NIOWorkerThread-7:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:27 zookeeper_node_1: 2019-10-24 21:56:27,354 [myid:1] -
WARN [NIOWorkerThread-4:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:27 zookeeper_node_3: 2019-10-24 21:56:27,662 [myid:3] -
WARN [NIOWorkerThread-2:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:27 zookeeper_node_3: 2019-10-24 21:56:27,810 [myid:3] -
WARN [NIOWorkerThread-6:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:27 zookeeper_node_1: 2019-10-24 21:56:27,811 [myid:1] -
WARN [NIOWorkerThread-2:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:27 zookeeper_node_2: 2019-10-24 21:56:27,816 [myid:2] -
WARN [NIOWorkerThread-2:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:28 zookeeper_node_2: 2019-10-24 21:56:28,366 [myid:2] -
WARN [NIOWorkerThread-6:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
Oct 25 10:56:28 zookeeper_node_1: 2019-10-24 21:56:28,474 [myid:1] -
WARN [NIOWorkerThread-6:NIOServerCnxn@370] - Exception causing close of
session 0x0: null
A quick search didn't return anything, but my guess is that it might
have to do with the upgrade from 3.4.14 and maybe old stuff remaining?
So any idea for what to check or do would be greatly appreciated.
Thanks
Sebastian
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