Why is spark connected to zookeeper in the "Hadoop Spark" bundle?

[Merlijn Sebrechts]

Hi all


According to the bigtop spark charm[1] zookeeper is used for standalone HA
mode. If this is the case, then why does the hadoop-spark[2] bundle include
a relationship between Spark and Zookeeper when spark_execution_mode
is"yarn-client"?

[1] https://jujucharms.com/spark/xenial
[2] https://jujucharms.com/hadoop-spark/



Kind regards
Merlijn
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