[SPARK-4771][Docs] Document standalone cluster supervise mode

[andrewor14]

@tdas looks like streaming already refers to the supervise mode. The link from there is broken though.

[andrewor14]

I checked that there are no references to this section

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Test build #24197 has started for PR 3627 at commit 2b55ed2.

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Test build #24197 has finished for PR 3627 at commit 2b55ed2.

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[tdas]

Could you define what is meant by failure? How is failure detected? Non-zero exit code?

[tdas]

Additionally, the cluster mode can be optionally asked to automatically restart your application if it fails with non-zero exit code.

[SparkQA]

Test build #24284 has started for PR 3627 at commit 9ca0908.

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[tdas]

nit: my point was also that it is known that we are talking about "standalone" so you can just say "cluster mode". But its okay.

[tdas]

LGTM.

[SparkQA]

Test build #24284 has finished for PR 3627 at commit 9ca0908.

• This patch passes all tests.
• This patch merges cleanly.
• This patch adds no public classes.

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Test PASSed.
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[andrewor14]

Ok merging into master thanks. I'll add a note to back port this later.

[andrewor14]

JK I just back ported this into branch-1.2 and 1.1.