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How to change hadoop configuration without down cluster?

Here i am tring to add new journal node to hadoop cluster, Is there any way to change conf of cluster without down


@karthik nedunchezhiyan

Post adding the journal node, A restart of services like HDFS, YARN and other dependent services is mandatory. As the new journal node entry will not be affected unless we restart the daemons.

Tnx for your response @Sandeep Nemuri, Can you please explain the steps to add new journal node to running cluster

But i am not using ambari, is there any other way to add without ambari

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