Hi @Kou_Bou    Can you please check below steps version and paste output here - Check java version $java -version $ls -ltr `which java` $rpm -wa |grep openssl Check - If multiple java version are existing  then check in case if there is any conflict.  You can verify this by using alternatives command - $/usr/sbin/alternatives --config java  [Please do not change here. Let the default java as it is] Is the issue only with one host registering in cluster  or the issue is with multiple hosts? If you see java used here is openjdk then can you try with using oracle jdk and test You can change java with below command - ambari-server setup –j <jdk path> Please do revert with Ambari server and Ambari agent version $rpm -qa |grep ambari From agent node try telnet to master at port 8440 [Check for iptables/selinux rules] $telnet <ambari-server>   8440 Pass latest ambari agent config.ini file Do revert with latest error/std log if the issue still exist ... View more

@Kou_Bou  Can you try setting below -   Set below property in ambari agent config.ini $vi /etc/ambari-agent/conf/ambari-agent.ini [Note:  please add below under Security section -as below]   [security] force_https_protocol=PROTOCOL_TLSv1_2​   Save and exit Restart ambari-agent Please check if that works. ... View more

@anshuman  Currently Node labels are not yet available for FairScheduler in CDH. From the latest jira update on Sep19, upstream - https://issues.apache.org/jira/browse/YARN-2497   Node labels are still not included in CDH. However i see it might come with HDP3.x/CDH6.X version as per link -   https://archive.cloudera.com/cdh6/6.0.0/docs/hadoop-3.0.0-cdh6.0.0/hadoop-yarn/hadoop-yarn-site/NodeLabel.html ... View more

@Manoj690    1. What is the error you are getting after following the link - https://community.cloudera.com/t5/Support-Questions/Ambari-metircs-not-started/m-p/283228#M210525%C2%A0%C2%A0   The error you pasted are you getting it while starting AMS via Ambari? Did you tried to start from CLI/backend using command "ambari-metrics-collector  start"?  Make sure you stop the service properly, kill if any pid exist and then start.   2. For phoenix - I see phoenix comes as part of hbase and is enabled or disabled from hbase configs as shown below. Its basically comes as part of hdp bits located in - /usr/hdp/current/phoenix-client /usr/hdp/current/phoenix-server Why do you want to completely uninstall phoenix ? Can you pass details so that we can help to understand and provide you if any workaround.     ... View more

@divya_thaore  1. If you are starting service via Ambari / Cloudera Manager UI then check the operation logs which are displayed in UI while you start the service     Please check for any errors in the logs clicking the service operational logs. 2. If you do not see any operational logs or any operation triggerred while you start/restart service then kindly restart agent service once [ambari agent/cloudera-scm-agent] 3. Else please check logs from cli as suggested by @Shelton    If you still need help please revert. ... View more

Hi @Manoj690    Did the earlier community link helped to resolve issue - https://community.cloudera.com/t5/Support-Questions/Ambari-metircs-not-started/m-p/283228#M210525   ??   Please confirm!! ... View more

@mike_bronson7  The latest command you posted again has typo. "R" is missing at the end in below command -   >>curl -u admin:admin -H "X-Requested-By: ambari" -X DELETE "http://node02:8080/api/v1/clusters/HDP/hosts/node01/host_components/SPARK2_THRIFTSERVE"   Pls try and pass new error if any. ... View more

yes. you can remove pig client using ambari api. ... View more