the errors are so how from these erros we can understand why port is down ? org.apache.hadoop.hdfs.server.namenode.JournalSet.mapJournalsAndReportErrors(JournalSet.java:393) 2017-12-05 20:33:23,716 FATAL namenode.FSEditLog (JournalSet.java:mapJournalsAndReportErrors(398)) - Error: recoverUnfinalizedSegments failed for required journal (JournalAndStream(mgr=QJM to [34.98.28.153:8485, 34.98.28.152:8485, 34.98.27.162:8485], stream=null)) at org.apache.hadoop.hdfs.server.namenode.JournalSet.mapJournalsAndReportErrors(JournalSet.java:393) org.apache.hadoop.hdfs.server.namenode.JournalSet.mapJournalsAndReportErrors(JournalSet.java:393) 2017-12-05 21:03:41,334 FATAL namenode.FSEditLog (JournalSet.java:mapJournalsAndReportErrors(398)) - Error: recoverUnfinalizedSegments failed for required journal (JournalAndStream(mgr=QJM to [34.98.28.153:8485, 34.98.28.152:8485, 34.98.27.162:8485], stream=null)) at org.apache.hadoop.hdfs.server.namenode.JournalSet.mapJournalsAndReportErrors(JournalSet.java:393) ... View more

from the log I can see that Getting jmx metrics from NN failed. URL: http://<master>:50070/jmx?qry=Hadoop:service=NameNode,name=FSNamesystem Traceback (most recent call last): ... View more

how to put the NameNode log in "tail" mode ? second how to force the port to start? ... View more

I found something refernce - https://ambari.apache.org/1.2.3/installing-hadoop-using-ambari/content/reference_chap2_1.html netstat -tnlpa | grep 50070 <br>no return any putout <br> and also this api not return output<br> curl -s 'http://<master>:50070/jmx?qry=Hadoop:service=NameNode,name=FSNamesystem' ... View more

dear jay , I check all you said and seems its ok ( yes we use only host names in the xml file ) , about - JMX from ambari server host. - what we need to check here ? second , I on this case more then two days , how we can debug it more deeply ? ... View more

yes we get that on all masters servers: netstat -tnlpa | grep 8485 tcp 0 0 0.0.0.0:8485 0.0.0.0:* LISTEN 14395/java ... View more

this is the complete syntax but I get error that cant understand , curl -u admin:admin -H "X-Requested-By: ambari" -X DELETE http://master02.dddns.com:8080/api/v1/clusters/HDP/hosts/worker04.dddns.com/host_components/METRICS_MONITOR { "status" : 404, "message" : "org.apache.ambari.server.controller.spi.NoSuchResourceException: The specified resource doesn't exist: ServiceComponentHost not found, clusterName=HDP, serviceName=AMBARI_METRICS, serviceComponentName=METRICS_MONITOR, hostName=worker04.dddns.com" ... View more

after we delete the component from the API we see the components still from the ambari GUI ( and after ambari-server restart ) how it can be? ... View more

yes still not both name node not startup or startup as standby ... View more

after we delete the components by API I still see the component in the worker machine ( even after ambari-server restart and ambari agent restart , what need to do ? ... View more