question Re: In ambari, how to find that the components NAMENODE and ZKFC were running on which host and on which port. in Support Questions

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

multithreaded_1 — Wed, 18 May 2016 15:45:35 GMT

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

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

sshimpi — Wed, 18 May 2016 15:51:21 GMT

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]

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

multithreaded_1 — Wed, 18 May 2016 16:19:26 GMT

@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 🙂