@KaviTiwari  Please make sure to set the "PYTHONPATH" variable to point to ambari agent lib directory as following: # export PYTHONPATH=/usr/lib/ambari-agent/lib:$PYTHONPATH # python test_alert_disk_space.py   . ... View more

@JayZhang  Until the mentioned JIRA is fixed permanently can you  please try this workaround. One time One line change inside the "/usr/lib/ambari-server/web/javascripts/app.js" file should work.   Step-1). Take a Safe Backup of the file "/usr/lib/ambari-server/web/javascripts/app.js" on ambari server host.   # cp -f /usr/lib/ambari-server/web/javascripts/app.js /PATH/To/Backup/app.js.ORIGINAL   Step-2). Also just above the "App.YarnContainersView = App.TextDashboardWidgetView.extend" line inside the above file you will see a function declaration like "counterOr" we will need to make one change there. (BEFORE CHANGE)   # grep -B12 'App.YarnContainersView' /usr/lib/ambari-server/web/javascripts/app.js var App = require('app'); function counterOrNA(key) { var _key = 'model.{0}.length'.format(key); return Em.computed(_key, function () { if (Em.isNone(this.get('model.' + key)) || this.get('model.metricsNotAvailable')) { return Em.I18n.t('services.service.summary.notAvailable'); } return this.get(_key); }); }     Step-3).  IN the above function block you will see a line as "var _key = 'model.{0}.length'.format(key);" We need to just remove the ".length" work from that string. (AFTER CHANGE)   # grep -B12 'App.YarnContainersView' /usr/lib/ambari-server/web/javascripts/app.js var App = require('app'); function counterOrNA(key) { var _key = 'model.{0}'.format(key); return Em.computed(_key, function () { if (Em.isNone(this.get('model.' + key)) || this.get('model.metricsNotAvailable')) { return Em.I18n.t('services.service.summary.notAvailable'); } return this.get(_key); }); }   Step-4).  Save the file and then Hard Refresh the Browser. On Mac (command + Shift + R) ... View more

@asmarz  Can you try this once. Copy the "/var/lib/ambari-server/create-python-wrap.sh" file from Ambari Server node and then Place it on the problematic Agent node at "/var/lib/ambari-agent/tmp/create-python-wrap.sh" and then again try to run the same command again and then verify if it creates the link? # sh -x /var/lib/ambari-agent/tmp/create-python-wrap.sh . Also pleas verify if you are using correct ambari agent binary on the host? # rpm -qa | grep ambari # grep ambari /var/log/yum.log   .   ... View more

@Kou_Bou  As we see that you are getting following kind of error "certificate_unknown" in AmbariServer logs 06 Nov 2019 12:06:35,805 WARN [qtp-ambari-agent-68] nio:720 - javax.net.ssl.SSLException: Received fatal alert: certificate_unknown 06 Nov 2019 12:06:35,904 WARN [qtp-ambari-agent-67] SecurityFilter:103 - Request <a href="https://192.168.253.45:8440/" target="_blank">https://192.168.253.45:8440/</a> doesn't match any patter Hence you should try to delete the OLD certificates from agent machine and then try again. As the old Agent certificates might be having incorrect names. # rm /var/lib/ambari-agent/keys/* # ambari-agent restart While restarting it should fetch correct certificates from ambari server. . . If your question is answered then, Please make sure to mark the answer as the accepted solution. If you find a reply useful, say thanks by clicking on the thumbs up button. ... View more

@Kou_Bou    Your "/etc/hosts" file should have the FQDN info of AmbariServer  (do not use localhost) to point to ambari server.   Also please change the "ambari-agent.ini" to point to the  AmbariServer FQDN instead of using "localhost"   https://docs.cloudera.com/HDPDocuments/Ambari-2.7.4.0/administering-ambari/content/amb_install_the_ambari_agents_manually_on_rhel-centos-oracle_7.html     On each Agent node, stop the Agent. # ambari-agent stop Using a text editor, edit /etc/ambari-agent/conf/ambari-agent.ini to point to the new host. [server] hostname=$NEW FULLY.QUALIFIED.DOMAIN.NAME url_port=8440 secured_url_port=8441         . ... View more