Cannot stop Zookeeper nodes from the ensemble formed in same machine

Question

I am running a zookeeper ensemble of 3 nodes in the same machine. I unpacked zookeepers to three different locations. I can start all the 3 nodes. When I look at the status of the nodes, one node is a leader and the other two are on the follower state. However, When I tried to stop the nodes, none of the nodes are stopping.

I have three zookeeper servers like,

/opt/zookeeper/zookeeper1
/opt/zookeeper/zookeeper2
/opt/zookeeper/zookeeper3

My zoo.cfg files are,

/opt/zookeeper/zookeeper1/conf/zoo.cfg

tickTime=2000
dataDir=/opt/zookeeper/zookeeper1/tmp
clientPort=2184
initLimit=10
syncLimit=5
server.1=localhost:2888:3888
server.2=localhost:2889:3889
server.3=localhost:2890:3890

/opt/zookeeper/zookeeper2/conf/zoo.cfg

tickTime=2000
dataDir=/opt/zookeeper/zookeeper2/tmp
clientPort=2185
initLimit=10
syncLimit=5
server.1=localhost:2888:3888
server.2=localhost:2889:3889
server.3=localhost:2890:3890

/opt/zookeeper/zookeeper3/conf/zoo.cfg

tickTime=2000
dataDir=/opt/zookeeper/zookeeper3/tmp
clientPort=2186
initLimit=10
syncLimit=5
server.1=localhost:2888:3888
server.2=localhost:2889:3889
server.3=localhost:2890:3890

I have started each nodes by

/opt/zookeeper/zookeeper1/bin: ./zkServer.sh start
/opt/zookeeper/zookeeper2/bin: ./zkServer.sh start
/opt/zookeeper/zookeeper3/bin: ./zkServer.sh start

I tried to stop one of the node by,

/opt/zookeeper/zookeeper2/bin: ./zkServer.sh stop
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/zookeeper2/bin/../conf/zoo.cfg
Stopping zookeeper ... ./zkServer.sh: line 182: kill: (14255) - No such process
STOPPED

Then I check the status of the node,

/opt/zookeeper/zookeeper2/bin: ./zkServer.sh status
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper/zookeeper2/bin/../conf/zoo.cfg
Mode: leader

I am seeking for an explanation of why I am not able to stop the nodes. Any help would be greatly appreciated.

score 0 · Answer 1 · answered Jul 12 '19 at 02:23

This line tells me that the pid file that the Zookeeper ./zkServer.sh script uses to stop the service is stale.

Stopping zookeeper ... ./zkServer.sh: line 182: kill: (14255) - No such process

I would suggest killing all the running zookeepers manually first (run ps -ef | grep java to identify other java processes running in the machine, and kill them manually), then starting them with the script, and once they're all up and running, try to stop them again.

Cannot stop Zookeeper nodes from the ensemble formed in same machine

1 Answers1