question Re: Moving Journal Node Directories in Support Questions

Moving Journal Node Directories

nismaily — Thu, 22 Dec 2016 05:32:31 GMT

What is the correct process in moving the Journal Node Directories to a different disk?

Lets say I have 3 servers, each running a Journal Node Service:

server1

server2

server3

The Journal Nodes are currently writing to /var/lib/hadoop/hdfs/journal

I want to change this to /data1/hadoop/hdfs/journal for each server

I've tried:

1) Stopping Namenodes (HA)

2) Copying data from /var/lib/hadoop/hdfs/journal to /data1/hadoop/hdfs/journal

3) Changing the dir property for the Journal Nodes in Ambari

4) Starting the Namenodes

This did not seem to work

Ravi_G — Thu, 22 Dec 2016 06:15:52 GMT

@Nasheb Ismaily Did you update new directory in Ambari - HDFS - configs - dfs.journalnode.edits.dir ?

Did you restart JNs after copying the data?

If you have done that,

Clean /data1/hadoop/hdfs/journal on all three JNs and restart all JNs

As HDFS user on any namenode , run hdfs namenode -initializeSharedEdits

And then start your Namenodes .

rzang — Thu, 29 Jun 2017 10:58:31 GMT

Note that Manage Journal Node is now available through UI in Ambari 2.5.1