Support Questions
Find answers, ask questions, and share your expertise
Announcements
Alert: Welcome to the Unified Cloudera Community. Former HCC members be sure to read and learn how to activate your account here.

How the Name node identifies the MR jobs in yarn if Active NN fails and passive NN became active.

How the Name node identifies the MR jobs in yarn if Active NN fails and passive NN became active.

New Contributor

In Name node HA scenario ,  if Active Namenode fails and passive Namenode became active, duuring this time how the MR jobs will function.

2 REPLIES 2

Re: How the Name node identifies the MR jobs in yarn if Active NN fails and passive NN became active

Champion

@ClouderaKnow

 

It is possible with the help of Journal Node.

 

"In order for the Standby node to keep its state synchronized with the Active node, both nodes communicate with a group of separate daemons called "JournalNodes" (JNs)."

 

You can refer this link for more details:

https://hadoop.apache.org/docs/r2.4.1/hadoop-project-dist/hadoop-hdfs/HDFSHighAvailabilityWithQJM.ht...

 

Re: How the Name node identifies the MR jobs in yarn if Active NN fails and passive NN became active

Master Collaborator
Your job will contitnue to run. Even if you restart the whole YARN