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https://issues.apache.org/jira/browse/KAFKA-4634?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15823181#comment-15823181
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Maharajan Shunmuga Sundaram commented on KAFKA-4634:
----------------------------------------------------
Here is the history of node 211 (ez6) connected to zookeeper
zk.log.1:[2017-01-13 00:23:03,076] INFO Session establishment complete on
server cz1/10.254.2.19:2181, sessionid = 0x159963f352b0004, negotiated timeout
= 6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 00:28:32,492] INFO Session establishment complete on
server cz1/10.254.2.19:2181, sessionid = 0x159963f352b0004, negotiated timeout
= 6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 00:29:15,234] INFO Session establishment complete on
server cz2/10.254.2.29:2181, sessionid = 0x159963f352b0004, negotiated timeout
= 6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 00:29:54,491] INFO Session establishment complete on
server cz/10.254.2.1:2182, sessionid = 0x159963f352b0004, negotiated timeout =
6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 00:52:24,093] INFO Session establishment complete on
server cz1/10.254.2.19:2181, sessionid = 0x159964e1e060013, negotiated timeout
= 6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 00:57:31,991] INFO Session establishment complete on
server cz1/10.254.2.19:2181, sessionid = 0x159966708470000, negotiated timeout
= 6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 00:57:43,908] INFO Session establishment complete on
server cz/10.254.2.1:2182, sessionid = 0x159966708470000, negotiated timeout =
6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 01:05:21,130] INFO Session establishment complete on
server cz2/10.254.2.29:2181, sessionid = 0x159966708470000, negotiated timeout
= 6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 01:05:28,513] INFO Session establishment complete on
server cz1/10.254.2.19:2181, sessionid = 0x159966e47760000, negotiated timeout
= 6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 01:35:52,068] INFO Session establishment complete on
server cz/10.254.2.1:2182, sessionid = 0x159966e47760000, negotiated timeout =
6000 (org.apache.zookeeper.ClientCnxn)
zk.log.1:[2017-01-13 01:40:22,562] INFO Session establishment complete on
server cz2/10.254.2.29:2181, sessionid = 0x159966e47760000, negotiated timeout
= 6000 (org.apache.zookeeper.ClientCnxn)
For the last session 0x159966e47760000, ez6 (Node: 211) has connected three
times with different zookeepers.
If I see stats on zookeeper, I do see stats for connected 211.
/10.254.2.211:45260[1](queued=0,recved=186033,sent=186033)
In CZ2,
>>> netstat -tulpan | grep 45260
tcp6 0 0 10.254.2.29:2181 10.254.2.211:45260 ESTABLISHED
3585/java
In EZ6,
>>> netstat -tulpan | grep 45260
tcp6 0 0 10.254.2.211:45260 10.254.2.29:2181 ESTABLISHED
3684/java
-------
If I see connection
/10.254.2.211:45260[1](queued=0,recved=186457,sent=186457,sid=0x159966e47760000,lop=PING,est=1484289622561,to=6000,lcxid=0x14740,lzxid=0x70001440d,lresp=1484496803926,llat=1,minlat=0,avglat=0,maxlat=32)
It lists session established time which matches broker log.
1484289622561 - Friday, January 13, 2017 1:40:22 AM
Last response time matches recent time
1484496803926 - Sunday, January 15, 2017 11:13:23 AM
But the session doesn't show up with broker id 211. Not sure what is the issue.
Any help is appreciated.
ls /brokers/ids
[212, 210, 112, 113, 213, 19, 110, 111, 29]
>> echo dump | nc cz2 2181
SessionTracker dump:
Session Sets (4):
0 expire at Sun Jan 15 11:22:40 EST 2017:
0 expire at Sun Jan 15 11:22:42 EST 2017:
8 expire at Sun Jan 15 11:22:44 EST 2017:
0x259968e41e30000
0x35996670d5d0000
0x159968e41dd0000
0x159966708470004
0x159966e47760000
0x159966708470003
0x2599672df260000
0x259966708550000
2 expire at Sun Jan 15 11:22:46 EST 2017:
0x35996670d5d0001
0x259966708550001
ephemeral nodes dump:
Sessions with Ephemerals (9):
0x259966708550000:
/brokers/ids/112
0x259968e41e30000:
/brokers/ids/213
0x159968e41dd0000:
/brokers/ids/19
0x159966708470003:
/brokers/ids/110
0x35996670d5d0000:
/brokers/ids/113
/controller
0x259966708550001:
/brokers/ids/111
0x159966708470004:
/brokers/ids/212
0x2599672df260000:
/brokers/ids/29
0x35996670d5d0001:
/brokers/ids/210
> Issue of one kafka brokers not listed in zookeeper
> --------------------------------------------------
>
> Key: KAFKA-4634
> URL: https://issues.apache.org/jira/browse/KAFKA-4634
> Project: Kafka
> Issue Type: Bug
> Components: core
> Affects Versions: 0.8.2.1
> Environment: Zookeeper version: 3.4.6-1569965, built on 02/20/2014
> 09:09 GMT
> kafka_2.10-0.8.2.1
> Reporter: Maharajan Shunmuga Sundaram
>
> Hi,
> We have incident that one of the 10 brokers not listed in brokers list of
> zookeeper.
> This is verified by running following command
> >> echo dump | nc cz2 2181
> SessionTracker dump:
> Session Sets (4):
> 0 expire at Fri Jan 13 22:32:14 EST 2017:
> 0 expire at Fri Jan 13 22:32:16 EST 2017:
> 7 expire at Fri Jan 13 22:32:18 EST 2017:
> 0x259968e41e30000
> 0x35996670d5d0001
> 0x35996670d5d0000
> 0x159966708470004
> 0x159966e47760000
> 0x159966708470003
> 0x2599672df260000
> 3 expire at Fri Jan 13 22:32:20 EST 2017:
> 0x159968e41dd0000
> 0x259966708550001
> 0x259966708550000
> ephemeral nodes dump:
> Sessions with Ephemerals (9):
> 0x259966708550000:
> /brokers/ids/112
> 0x259968e41e30000:
> /brokers/ids/213
> 0x159968e41dd0000:
> /brokers/ids/19
> 0x159966708470003:
> /brokers/ids/110
> 0x35996670d5d0000:
> /brokers/ids/113
> /controller
> 0x259966708550001:
> /brokers/ids/111
> 0x159966708470004:
> /brokers/ids/212
> 0x2599672df260000:
> /brokers/ids/29
> 0x35996670d5d0001:
> /brokers/ids/210
> ------
> There are 10 sessions, but only 9 sessions are listed with brokers.
> Broker with id 211 is not listed. Session 0x159966e47760000 is not shown with
> broker id 211.
> In the broker side log, I do see it is connected
> >> zgrep "0x159966e47760000" *log*
>
> zk.log:[2017-01-13 01:05:28,513] INFO Session establishment complete on
> server cz1/10.254.2.19:2181, sessionid = 0x159966e47760000, negotiated
> timeout = 6000 (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:35:38,163] INFO Unable to read additional data from
> server sessionid 0x159966e47760000, likely server has closed socket, closing
> socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:35:39,101] WARN Session 0x159966e47760000 for server
> null, unexpected error, closing socket connection and attempting reconnect
> (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:35:40,121] INFO Unable to read additional data from
> server sessionid 0x159966e47760000, likely server has closed socket, closing
> socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:35:41,770] WARN Session 0x159966e47760000 for server
> null, unexpected error, closing socket connection and attempting reconnect
> (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:35:42,439] WARN Session 0x159966e47760000 for server
> null, unexpected error, closing socket connection and attempting reconnect
> (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:35:43,235] INFO Unable to read additional data from
> server sessionid 0x159966e47760000, likely server has closed socket, closing
> socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:35:44,950] WARN Session 0x159966e47760000 for server
> null, unexpected error, closing socket connection and attempting reconnect
> (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:35:45,837] INFO Unable to read additional data from
> server sessionid 0x159966e47760000, likely server has closed socket, closing
> socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
> .
> .
> .
> .
> zk.log:[2017-01-13 01:40:14,818] INFO Unable to read additional data from
> server sessionid 0x159966e47760000, likely server has closed socket, closing
> socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:40:15,916] WARN Session 0x159966e47760000 for server
> null, unexpected error, closing socket connection and attempting reconnect
> (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:40:19,692] INFO Client session timed out, have not
> heard from server in 3676ms for sessionid 0x159966e47760000, closing socket
> connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:40:20,632] INFO Unable to read additional data from
> server sessionid 0x159966e47760000, likely server has closed socket, closing
> socket connection and attempting reconnect (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:40:20,814] WARN Session 0x159966e47760000 for server
> null, unexpected error, closing socket connection and attempting reconnect
> (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:40:22,089] WARN Session 0x159966e47760000 for server
> null, unexpected error, closing socket connection and attempting reconnect
> (org.apache.zookeeper.ClientCnxn)
> zk.log:[2017-01-13 01:40:22,562] INFO Session establishment complete on
> server cz2/10.254.2.29:2181, sessionid = 0x159966e47760000, negotiated
> timeout = 6000 (org.apache.zookeeper.ClientCnxn)
> After several tries, broker connected with zookeeper cz2:2181. I am not sure
> how to debug this issue. It would be helpful if someone provides way to debug
> this issue.
> Regards,
> Maharajan S
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