[BEAM-2852] Update Nexmark documentation with Kafka support

[aromanenko-dev]

Added configuration options to use Kafka as source/sink for benchmark events and results.

[aromanenko-dev]

@echauchot Please, take a look

[echauchot]

LGTM, thanks

[echauchot]

@asfgit merge

[asfgit]

Error: PR failed in verification; check the Jenkins job for more information.

[echauchot]

mergebot timeouts

[echauchot]

@asfgit merge

[asfgit]

MergeBot: Merge: PR 460 in state error with description Unexpected Error: 502 Server Error: Proxy Error for url: https://builds.apache.org/job/beam_PreCommit_Website_Merge/api/python?tree=builds%5Bnumber%2Curl%5D.. URL: http://mergebot-vm2.apache.org:8080/beam-website/460.

[asfgit]

Error: MergeBot encountered an unexpected error while processing this PR: 502 Server Error: Proxy Error for url: https://builds.apache.org/job/beam_PreCommit_Website_Merge/api/python?tree=builds%5Bnumber%2Curl%5D.

[echauchot]

@melap @swegner can you please take a look at mergebot issue, I don't think I have the needed rights?

[swegner]

I also don't have permissions :-/ @jasonkuster does
Sometimes a retry can help unblock, or I believe there is a way to manually merge.

FYI, [BEAM-4493] tracks the work to make the website contribution process more stable.

[echauchot]

@asfgit merge

[asfgit]

MergeBot: Merge: PR 460 in state error with description Unexpected Error: 502 Server Error: Proxy Error for url: https://builds.apache.org/job/beam_PreCommit_Website_Merge/239/api/python?depth=1&tree=building.. URL: http://mergebot-vm2.apache.org:8080/beam-website/460.

[asfgit]

Error: MergeBot encountered an unexpected error while processing this PR: 502 Server Error: Proxy Error for url: https://builds.apache.org/job/beam_PreCommit_Website_Merge/239/api/python?depth=1&tree=building.

[iemejia]

@asfgit merge

[aromanenko-dev]

@iemejia Thanks for merging!