[GitHub] [hadoop] vivekratnavel opened a new pull request #1201: HDDS-1788. Add kerberos support to Ozone Recon

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vivekratnavel opened a new pull request #1201: HDDS-1788. Add kerberos support to Ozone Recon
URL: https://github.com/apache/hadoop/pull/1201
 
 
   Recon fails to come up in a secure cluster with the following error:
   ```
   Failed startup of context o.e.j.w.WebAppContext@2009f9b0{/,file:///tmp/jetty-0.0.0.0-9888-recon-_-any-2565178148822292652.dir/webapp/,UNAVAILABLE}{/recon} javax.servlet.ServletException: javax.servlet.ServletException: Principal not defined in configuration at org.apache.hadoop.security.authentication.server.KerberosAuthenticationHandler.init(KerberosAuthenticationHandler.java:188) at
   ```
   
   This patch addresses this issue and enables Recon to come up in clusters secured by kerberos. I have manually tested the patch by creating the recon jar and replacing an old jar in a live secure CM deployed cluster and verified that Recon starts successfully and is able to login successfully with the kerberos ticket. Also updated ozonesecure docker-compose file to add recon and verified that recon is able to come up successfully. This patch also fixes various typos found in other parts of the source code not related to the title of this JIRA.

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