@kanna k Also please refer to: https://community.hortonworks.com/content/supportkb/150265/errorpkix-path-building-failed-sunsecurityprovider.html ... View more

@kanna k Looks like you have configured HTTPS for you ambari server and accessing ambari server using HTTPS. And you do not have ambari truststore configured with the ambari certificate imported to it. Hence you are getting the following error: Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target . In order to resolve this issue: You case you will need to Ambari certificates to the Ambari truststore. 1. Setup Ambari Truststore as described in: https://docs.hortonworks.com/HDPDocuments/Ambari-2.6.1.5/bk_ambari-security/content/set_up_truststore_for_ambari_server.html 2. Get the Ambari certificate as following: # echo | openssl s_client -showcerts -connect <AMBARI_HOST>:<AMBARI_HTTPS_PORT> 2>&1 | sed --quiet '/-BEGIN CERTIFICATE-/,/-END CERTIFICATE-/p' > /tmp/ambari_certificate.crt 3. Suppose if your ambari truststore file name is "truststore.jks" then import the ambari_certificate to it as following: # $JAVA_HOME/bin/keytool -importcert -file /tmp/ambari_certificate.crt -keystore truststore.jks 4. Restart Ambari Server. 5. Access the CS view again. . ... View more

@Ajay Jayswal Host metrics are available as part of the Ambari Metrics Monitor data collection. So can you please check if you have installed the Ambari Metrics Collector on your cluster and also the Ambari Metrics Monitor service is running fine on every Host of the cluster so that the ambari metrics monitor can collect the host metrics and send it to the AMS collector. . Please check the "/var/log/ambari-metrics-monitor/ambari-metrics-monitor.out". this file to see if the Monitor is able to properly communicate with the AMS collector or not? If you find any error then please also share the "ambari-metrics-collector.log" . ... View more

@Shota Akhalaia If there was no Ambari Server installed already or if the Ambari DB is lost (corrupted / no backups) then Ambari Takeover is a process which can be used. But it completely depends on which kind of components you have installed and it is usually a tough process to setup Ambari over an existing HDP cluster. But it can be achieved. Similar threads you can find here: https://community.hortonworks.com/questions/34197/can-ambari-manage-an-exists-hadoop-cluster-an-upda.html . https://community.hortonworks.com/questions/96817/monitoring-non-ambari-cluster-health-and-status.html . ... View more

@Biliyaminu Umar As per AMS specification the "appId" and "metricsNames" are the mandatory attributes. In case of metrics names in some places we can use Wild Cards like following: http://<server>:6188/ws/v1/timeline/metrics?metricNames=regionserver.Server.%&appId=hbase&startTime=1521167109&endTime=1521188709 . In the above case it will show all the "regionServer.Server.%" metrics. More details about wild card can be found here: https://cwiki.apache.org/confluence/display/AMBARI/Metrics+Collector+API+Specification ... View more

@Dale Preston As soon as we open the https://hortonworks.com/downloads/#sandbox. somewhere at the bottom of the page it shows the popup blocker warning: . Once we click on the Download button like "Download for Virtualbox" then on the right side of the page it shows "Register Your Sandbox" popup with 3 Checkboxes. Once we accept those conditions and click on the "Submit" button then the download begins. So can you please let us know if you are able to click that button? ... View more

@Dale Preston I just tried downloading the HDP 2.6.4 Sandbox at my end and it started fine. ... View more

@Dale Preston Is your browser allowing Popups? Or is it blocking the popups? Please disable the popup blocker. It may be the browser policy which might be blocking the download. Can you please try from a different machine/laptop just for testing? ... View more