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https://issues.apache.org/jira/browse/HADOOP-16130?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16810525#comment-16810525
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Liang Gao commented on HADOOP-16130:
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Thanks [~ghuangups] for the benchmark tool! We were able to build it and use it
internally : )
I sort of get this (delegation token test) working so would like to share, only
if you haven't get a chance to start working on this yet.
> Support delegation token operations in KMS Benchmark
> ----------------------------------------------------
>
> Key: HADOOP-16130
> URL: https://issues.apache.org/jira/browse/HADOOP-16130
> Project: Hadoop Common
> Issue Type: Sub-task
> Affects Versions: 3.3.0
> Reporter: Wei-Chiu Chuang
> Assignee: George Huang
> Priority: Major
>
> At the last Hadoop Contributors Meetup, [~daryn] shared another KMS
> throughput bottleneck is ZooKeeper -- KMS uses ZK to store delegation tokens.
> ZK would be brought to a halt when expired delegation tokens are purged. That
> sounds critical especially given that in most deployments KMS share the same
> ZK quorum as HDFS, it would cause NameNode failover.
> The current KMS benchmark does not support delegation token operations
> (addDelegationTokens, cancelDelegationToken, renewDelegationToken) so it's
> hard to understand how bad it is, and hard to quantify the improvement of a
> fix.
> File this jira to support those operations before we move on to the fix for
> the ZK issue.
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