Ethanlm opened a new pull request #3219: [STORM-3494] Use UserGroupInformation to login to HDFS only once per process URL: https://github.com/apache/storm/pull/3219 `HadoopLoginUtil.loginHadoop(conf);` should be used when login to hadoop from Storm daemons. Rework https://github.com/apache/storm/pull/3189 by using reflections. This avoids breaking backwards compatibility.
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