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NameNode Last Checkpoint script alert definition does not trigger based on uncommitted transactions

Explorer

HI Team

The 'NameNode Last Checkpoint' alert description says "This service-level alert will trigger if the last time that the NameNode performed a checkpoint was too long ago. It will also trigger if the number of uncommitted transactions is beyond a certain threshold."

I got alert on HA, Saying checkpoint happened too long ago.. How to solve this issue.

HDP : 2.3

1 ACCEPTED SOLUTION

Accepted Solutions

Restarting the Namenode will fix your issue, Before restarting run below commands

hdfs dfsadmin -safemode enter
hdfs dfsadmin -saveNamespace
hdfs dfsadmin -safemode leave

Now restart NN, JN.

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13 REPLIES 13

Explorer

Do i need to run any commands? Manually to update the checkpoint .

Explorer

Can some one help ????

@suresh krish

Which version of Ambari are you using? it seems your issue is fixed in Ambari 2.4

details are here:

https://issues.apache.org/jira/browse/AMBARI-15953

Explorer

Ambari 2.1

Explorer

What is the actual cause. Is it really not checkpointing the edits or its just a ignorable alert

I'm not sure if we can ignore this alerts but it seems issue with Ambari Alert script and they fixed it in 2.4. I would recommend to check with HDP while creating support ticket to get confirmation.

Restarting the Namenode will fix your issue, Before restarting run below commands

hdfs dfsadmin -safemode enter
hdfs dfsadmin -saveNamespace
hdfs dfsadmin -safemode leave

Now restart NN, JN.

View solution in original post

Contributor

@SBandaru

I have performed the above steps but after sometime these alerts are coming again and again. So can you please suggest something to fix this issue permanentaly.

@Yukti Agrawal , I have met just the same problem, after performing the above steps ,then after sometime these alerts are coming again and again , did you solve this problem ? I set dfs.namenode.checkpoint.period to 1 hour , but it seems it did not work, since I checked the fsimage file which is not generated automatically per hour , thanks