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From vijikarthi <vijikar...@yahoo.com>
Subject Re: Flink using Yarn on MapR
Date Fri, 11 Nov 2016 14:22:12 GMT
Flink security context gets initialized during the application start phase.
As part of the initialization, the UserGroupInformation (UGI) instance is
bootstrapped using the Hadoop configuration files (read: HADOOP_CONF_DIR or
YARN_CONF_DIR environment variable is set). If the hadoop configuration
(core-site) enables security, then the UGI context uses JAAS module to
load/login through Kerberos. Looks like in this case, the Hadoop
configurations that got loaded somehow has the security enabled and UGI is
trying to obtain the identity using keytab cache.

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