In ambari, how to find that the components NAMENODE and ZKFC were running on which host and on which port.

[#1]

Even when a host crashes, can I know on which port NAMENODE was listening on the crashed host ?

[#2 · Accepted solution]

@Mukesh Burman

Login to Ambari - Click Services-> HDFS serivce->Summary->Click on Namenode <- a new page will open which will display hostname on top on which namenode is running. Same for ZKFC

2. ps -aef |grep nameode <-capture the pid from here [for eg say it is 3490

then do netstat for that pid to get the port -

netstat taupen |grep <pid/3490>

The 4th column in netstat o/p shows ipaddress:port no.

Difficult for namenode port even if service crash.

You should check namenode conf file for port on which namenode service will always start - /etc/hadoop/confhdfs-site.xml [port 8020,50070]

[#3]

@Sagar Shimpi ThanksMan, it helped 🙂

For all two NAMENODE in my cluster I can initialize a ini file with component and port number, and later on after a node crashes, I can use this ini file for further recovery process...

Thanks again 🙂