When you run the Informatica upgrade, the installer backs up the existing hadoopEnv.properties file. You can find the backup hadoopEnv.properties file in the following location:

<Previous Informatica installation directory>/services/shared/hadoop/<Hadoop distribution name>_<version>/infaConf

Edit the Hadoop connection in the Administrator tool or the Developer tool to include any properties that you manually configured in the hadoopEnv.properties file. The Hadoop connection contains default values for properties such as cluster environment and path variables and advanced properties. You can update the default values to match the properties in the hadoopEnv.properties file.