RajshekharMuchandi opened a new pull request, #440:
URL: https://github.com/apache/incubator-livy/pull/440
Added safe mode check to implement safe mode
## 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.
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