HDFS NameNode Instances Become Standby After the RPC Port Is Changed

Issue

Symptom

Cause Analysis

Procedure

1. Log in to Manager and stop the HDFS service.
   Note

   Do not stop related services when stopping HDFS.

2. After the services are stopped, log in to the Master node whose RPC port is changed.
   Note

   If the RPC port is changed on both Master nodes, you can log in to either of the Master nodes.

3. Run the su - omm command to switch to user omm.
   Note

   For a security cluster, run the kinit hdfs command for authentication.

4. Run the following command to load the environment variable script to the environment:

   cd ${BIGDATA_HOME}/MRS_X.X.X/1_8_Zkfc/etc

   source ${BIGDATA_HOME}/MRS_X.X.X/install/FusionInsight-Hadoop-3.1.1/hadoop/sbin/exportENV_VARS.sh

   Note

   In the preceding command, MRS_X.X.X and 1_8 vary depending on the actual version.

5. After the loading is complete, run the following command to format the Zkfc:

   cd ${HADOOP_HOME}/bin

   ./hdfs zkfc -formatZK

6. After the formatting is successful, restart HDFS on Manager.
   Note

   If the RPC port of the NameNode is changed, the configuration file must be updated for all clients that have been installed.