tree 807b5bb3a2469e2c4f4a63d034fdcc6d9dd75700
parent 96b1eb617b18302ae842d0ebed298e5ec61429f5
author RajshekharMuchandi <rsmuchandi@gmail.com> 1710257237 +0530
committer GitHub <noreply@github.com> 1710257237 +0100
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[LIVY-977][SERVER][CONF] Livy can not be started if HDFS is still in safe mode (#440)

## What changes were proposed in this pull request?

HDFS safe mode is checked when livy session is created. If safe mode is ON, then IllegalStateException is thrown after max retry attempts (configurable) with safe mode interval (configurable) checks are done. If safe mode is OFF, then livy will be able to create session.

https://issues.apache.org/jira/browse/LIVY-977

## How was this patch tested?

Added unit test cases to validate code changes. Also, done manual testing in CDP cluster by creating livy sessions with HDFS safe mode check ON/OFF.