Setting up Elasticsearch’s JAVA_HOME on CentOS involves the following steps. As part of our Server Management Service, Bobcares provides answers to all of your questions.

Setting up Elasticsearch’s JAVA_HOME on CentOS

We must run the following steps in order to set up the variable:

1. We must first install Java on the CentOS system. Installing Oracle JDK or OpenJDK is an option. We can use the YUM package manager in order to set up OpenJDK as follows:

2. We need to find the setup directory after setting up Java. The Java executable can be found using the below command. It will produce the path, which usually looks like /usr/bin/java, to the Java executable.

3. We may set the JAVA_HOME environment variable after locating the Java executable. Use a text editor like nano or vi to make changes to the Elasticsearch config file:

To point to the location of the Java setup, add or edit the JAVA_HOME variable.

4. For the changes to take effect, restart the Elasticsearch service after changing JAVA_HOME:

5. By looking through the Elasticsearch logs or sending a query over Elasticsearch’s HTTP API, we may confirm that Elasticsearch is running the correct version of Java:

We should see a JSON response containing details about the Elasticsearch cluster if Elasticsearch is working properly.

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Conclusion

The article offers the steps from our Tech team to set up Elasticsearch’s JAVA_HOME on CentOS.