[jira] [Created] (SPARK-11020) HistoryServer fails to come up if HDFS takes too long to come out of safe mode

["Marcelo Vanzin (JIRA)" <ji...@apache.org>]

Marcelo Vanzin created SPARK-11020:
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             Summary: HistoryServer fails to come up if HDFS takes too long to come out of safe mode
                 Key: SPARK-11020
                 URL: https://issues.apache.org/jira/browse/SPARK-11020
             Project: Spark
          Issue Type: Bug
          Components: Spark Core
    Affects Versions: 1.5.1, 1.6.0
            Reporter: Marcelo Vanzin


When HDFS is starting up, it starts in safe mode until the NN is able to read the whole fs image and initialize everything. For a really large NN that can take a while.

If the HS is started at the same time, it may give up trying to check whether the event log directory exists, and exit. That's a little sub-optimal; the HS could wait until HDFS came out of safe mode instead.



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