sanjay kenganahalli vamanna created HDFS-9956:
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Summary: LDAP PERFORMANCE ISSUE AND FAIL OVER
Key: HDFS-9956
URL: https://issues.apache.org/jira/browse/HDFS-9956
Project: Hadoop HDFS
Issue Type: Bug
Reporter: sanjay kenganahalli vamanna
The typical LDAP group name resolution works well under typical scenarios.
However, we have seen cases where a user is mapped to many groups (in an
extreme case, a user is mapped to more than 100 groups). The way it's being
implemented now makes this case super slow resolving groups from
ActiveDirectory and making the namenode to failover.
Instead of failover, we can use the parameter(ha.zookeeper.session-timeout.ms)
in the getgroups method to time-out and send the failed response back to the
user so that we can prevent name node failover.
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