question Re: Why is ambari showing incorrect number of data nodes available? in Support Questions https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94912#M58282 <P>Hi Mike - I am assuming you have already tried restarting the Ambari Agent? I have seen stale agent process causing similar issue as well. </P> Tue, 06 Oct 2015 09:47:55 GMT bsaini 2015-10-06T09:47:55Z Why is ambari showing incorrect number of data nodes available? https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94907#M58277 <P>Ambari shows 6 of 5 datanodes live in dashboard. The correct count is 6 nodes, which is reflected in the NameNode UI. I have tried restarting Ambari-server and all the agents and issue will not resolve. </P><P>What other options should I explore to update the correct node count?</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="204-screen-shot-2015-10-05-at-120527-pm.png" style="width: 334px;"><img src="https://community.cloudera.com/t5/image/serverpage/image-id/24054i836BABFA07EB11F2/image-size/medium?v=v2&amp;px=400" role="button" title="204-screen-shot-2015-10-05-at-120527-pm.png" alt="204-screen-shot-2015-10-05-at-120527-pm.png" /></span></P> Mon, 19 Aug 2019 12:59:11 GMT https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94907#M58277 michael_perez 2019-08-19T12:59:11Z Re: Why is ambari showing incorrect number of data nodes available? https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94908#M58278 <P>What version of Ambari are you running and have you recently removed a host with a DataNode component on it?</P> Tue, 06 Oct 2015 01:14:07 GMT https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94908#M58278 pcodding 2015-10-06T01:14:07Z Re: Why is ambari showing incorrect number of data nodes available? https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94909#M58279 <P>I think it just takes some extra time when an architectural change is made to the cluster but eventually Ambari displays it correctly. I noticed something similar after enabling HA where Ambari took 5+ minutes to show the correct number of datanodes. If the problem persists, it may be another issue. </P> Tue, 06 Oct 2015 01:38:36 GMT https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94909#M58279 bsaini 2015-10-06T01:38:36Z Re: Why is ambari showing incorrect number of data nodes available? https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94910#M58280 <P>Hi Paul, we are running Ambari Version2.0.1 on this cluster. The datanode service is still running on the cluster. Ambari isnt recognizing the service on the dashboard.</P> Tue, 06 Oct 2015 09:44:29 GMT https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94910#M58280 michael_perez 2015-10-06T09:44:29Z Re: Why is ambari showing incorrect number of data nodes available? https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94911#M58281 <P>This issue has been on-going for several days without any resolution.</P> Tue, 06 Oct 2015 09:44:59 GMT https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94911#M58281 michael_perez 2015-10-06T09:44:59Z Re: Why is ambari showing incorrect number of data nodes available? https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94912#M58282 <P>Hi Mike - I am assuming you have already tried restarting the Ambari Agent? I have seen stale agent process causing similar issue as well. </P> Tue, 06 Oct 2015 09:47:55 GMT https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94912#M58282 bsaini 2015-10-06T09:47:55Z Re: Why is ambari showing incorrect number of data nodes available? https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94913#M58283 <P><A rel="user" href="https://community.cloudera.com/users/321/michaelperez.html" nodeid="321">@michael.perez@hortonworks.com</A> - my suggestion would be to get on Ambari 2.0.2 as I noticed this issue in 2.0.1, specifically in reporting 1 more host than really existed in the list view (AMBARI-10297). Check out the <A href="http://docs.hortonworks.com/HDPDocuments/Ambari-2.0.2.0/bk_releasenotes_ambari_2.0.2.0/content/ambari_relnotes-2.0.2.0-fixed-issues.html">release notes</A> as well for more information.</P> Tue, 06 Oct 2015 20:24:08 GMT https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94913#M58283 pcodding 2015-10-06T20:24:08Z Re: Why is ambari showing incorrect number of data nodes available? https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94914#M58284 <P>when I delete one host, this occured</P><P><span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="20468-1212.png" style="width: 153px;"><img src="https://community.cloudera.com/t5/image/serverpage/image-id/24053iC4271A4114EA5A07/image-size/medium?v=v2&amp;px=400" role="button" title="20468-1212.png" alt="20468-1212.png" /></span></P><P>how to solve it ? ambari 2.4.1.0</P> Mon, 19 Aug 2019 12:59:03 GMT https://community.cloudera.com/t5/Support-Questions/Why-is-ambari-showing-incorrect-number-of-data-nodes/m-p/94914#M58284 454596169 2019-08-19T12:59:03Z