HDFS GUI is giving error

[#1]

Hi Team, 
HDFS was working before kurberos enabled , noww post enabling kurberos HDFS is not working. Getting error in HDFS GUI, HDFS is running in cloudera manager.

Name node is showing, Test of whether the NameNode is in safe mode.

```

Bad : This NameNode is in safe mode.

```

Error:

```

HTTP ERROR 502 Process information not available.

URI:STATUS:MESSAGE:SERVLET:

/cmf/process/1546341404/logs

502

Process information not available.

Spring MVC Dispatcher Servlet

```

[#2]

Hi,

To fix the HDFS issue after enabling Kerberos, you should check the Kerberos configuration and ensure that all services are correctly authenticated. If the NameNode is in safe mode, you can try to exit it using the command hdfs dfsadmin -safemode leave.

For the HTTP ERROR 502, verify the network configuration and ensure that the Cloudera Manager services are running properly.

[#3]

@divyank The HDFS NameNode in safemode may happen due to its waiting for the DataNodes to send the block report. If that is not completed it may remain in the safemode. Ensure all the DataNodes started properly and no errors with it and connected to NameNode. You may review the NameNode logs and look for what its waiting for to exit safemode. Manually exiting the safemode may cause data loss of un reported blocks. If you have doubt, don't hesitate to contact Cloudera Support.