@Adil BAKKOURI
Ambari Simply makes use of the Zookeeper Smoke Test "zkSmoke.sh" script to verify the Zookeeper Connection and if it can create & delete the dummy ZNode "/zk_smoketest" inside the zookeeper host or not?
As you see the following message:
ExecutionFailed: Execution of '/var/lib/ambari-agent/tmp/zkSmoke.sh /usr/hdp/current/zookeeper-client/bin/zkCli.sh ambari-qa /usr/hdp/current/zookeeper-client/conf 2181 False kinit no_keytab no_principal /var/lib/ambari-agent/tmp/zkSmoke.out' returned 4. zk_node1=master.rh.bigdata.cluster
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Exception in thread "main" org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /zk_smoketest
Which means your Zookeeper process might not be running file. Most probably the Zookeeper port might not be accessible on host "master.rh.bigdata.cluster"
So you will need to first check if your Zookeeper is running fine or not on host "master.rh.bigdata.cluster" and if the Zookeeper port 2181 is listening fine or not?
# ps -ef | grep -i zookeeper
# netstat -tnlpa | grep 2181
# service iptables stop
Most Possible Cause:
If you see that Zookeeper process is not running then please try to restart it and check the Zookeper Logs to find any issue/ startup failure and please share the log.
Most probably once your Zookeeper is running fine and the port 2181 is accessible then your Zookeeper Check Should also run fine.
Firewall or Port Blocking issue:
So please go to the host where the SmokeTest is failing and then try to telnet to Zookeeper Host & Port to see if that is accessible?
# telnet master.rh.bigdata.cluster 2181
(OR)
# nc -v master.rh.bigdata.cluster 2181
Manual Test:
You your self can try running the same command to verify this Zookeeper Zmoke Test run Try running this command on different Zookeeper nodes as it is.
# /var/lib/ambari-agent/tmp/zkSmoke.sh /usr/hdp/current/zookeeper-client/bin/zkCli.sh ambari-qa /usr/hdp/current/zookeeper-client/conf 2181 False kinit no_keytab no_principal /var/lib/ambari-agent/tmp/zkSmoke.out
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