shanyu zhao created SLIDER-1119:
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Summary: Strip off Zookeeper dependency if Yarn Registry is not
enabled
Key: SLIDER-1119
URL: https://issues.apache.org/jira/browse/SLIDER-1119
Project: Slider
Issue Type: Bug
Affects Versions: Slider 0.90.2
Reporter: shanyu zhao
In some Hadoop cluster where Yarn registry is not enabled, we should not use it
in Slider. To check if Yarn registry is enabled or not, we can check an
existing hadoop configuration (hadoop.registry.rm.enabled).
Today the main use of Yarn registry is to securely publish Slider AM operation
URL, so that Slider agent can connect to Slider AM. Without Yarn registry, we
can directly pass in the AM operation URL as a command line parameter to
containers when launching the container.
Now admittedly without Yarn registry we lose Slider AM HA. This is because when
AM restarts, there is no way to tell containers where to find the new AM. In
this case AM would restart those containers. This may not be desirable for some
usage but is fine with some other usage scenarios.
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