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Why is ambari showing incorrect number of data nodes available?

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Why is ambari showing incorrect number of data nodes available?

New Contributor

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.

What other options should I explore to update the correct node count?

204-screen-shot-2015-10-05-at-120527-pm.png

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Why is ambari showing incorrect number of data nodes available?

Guru

@michael.perez@hortonworks.com - 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 release notes as well for more information.

7 REPLIES 7

Re: Why is ambari showing incorrect number of data nodes available?

Guru

What version of Ambari are you running and have you recently removed a host with a DataNode component on it?

Re: Why is ambari showing incorrect number of data nodes available?

New Contributor

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.

Re: Why is ambari showing incorrect number of data nodes available?

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.

Re: Why is ambari showing incorrect number of data nodes available?

New Contributor

This issue has been on-going for several days without any resolution.

Re: Why is ambari showing incorrect number of data nodes available?

Hi Mike - I am assuming you have already tried restarting the Ambari Agent? I have seen stale agent process causing similar issue as well.

Re: Why is ambari showing incorrect number of data nodes available?

Guru

@michael.perez@hortonworks.com - 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 release notes as well for more information.

Re: Why is ambari showing incorrect number of data nodes available?

New Contributor

when I delete one host, this occured

20468-1212.png

how to solve it ? ambari 2.4.1.0

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