Ambari Alert - DataNode heapsize alert

[#1]

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

[#2 · Accepted solution]

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

[#3]

@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.

[#4]

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.

[#5]

Thank you @Arpit Agarwal