question Re: Ambari Alert - DataNode heapsize alert in Archives of Support Questions (Read Only)

Ambari Alert - DataNode heapsize alert

kums — Tue, 28 Feb 2017 05:23:10 GMT

We upgraded from HDP2.3 to 2.4 and Ambari from 2.2.0 to 2.2.2 and we started getting DataNode Heapsize alert. Although it is not causing any issues with the environment, would like to clarify few things :

1) Has this alert been introduced in Ambari 2.2.2 ?

2) Is HDP2.4 is expected to consume more heapspace then the previous versions ?

Thanks

Kumar

Re: Ambari Alert - DataNode heapsize alert

ArpitAgarwal — Tue, 28 Feb 2017 06:49:11 GMT

This is a benign issue and the alerts can be safely ignored. It was addressed by AMBARI-18936.

You can fix it by manually adding the following options to HADOOP_DATANODE_OPTS via Ambari:

-XX:CMSInitiatingOccupancyFraction=70 -XX:+UseCMSInitiatingOccupancyOnly -XX:ConcGCThreads=8 -XX:+UseConcMarkSweepGC

Re: Ambari Alert - DataNode heapsize alert

kums — Tue, 28 Feb 2017 07:53:01 GMT

@Arpit Agarwal Is this alert been introduced in Ambari 2.2.2 ?

Just wanted to confirm that this has been happening and recent ambari upgrade exposed this behaviour.

Re: Ambari Alert - DataNode heapsize alert

ArpitAgarwal — Thu, 02 Mar 2017 06:08:41 GMT

Hi @Kumar Veerappan, Yes this alert seems to be new for Ambari 2.2.2. I don't see it in the 2.2.1 release.

Re: Ambari Alert - DataNode heapsize alert

kums — Thu, 02 Mar 2017 23:39:53 GMT

Thank you @Arpit Agarwal