The parameter MetricData.member.12.Dimensions.member.1.Value is required. (Aws::CloudWatch::Errors::MissingParameter)

[taimoordev]

Hey @sj26
I have following gems
sidekiq-cloudwatchmetrics (2.6.0)
sidekiq (7.2.0, 7.0.7, 6.4.2)
aws-sdk-cloudwatch (1.81.0, 1.67.0)

and I get the following error on the CloudWatch console.

53
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#<Thread:0x00007f5f4f1d1b30@cloudwatch metrics publisher /usr/local/bundle/gems/sidekiq-6.4.2/lib/sidekiq/util.rb:63 run> terminated with exception (report_on_exception is true):
54
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/usr/local/bundle/gems/aws-sdk-core-3.131.1/lib/seahorse/client/plugins/raise_response_errors.rb:17:in `call': The parameter MetricData.member.12.Dimensions.member.1.Value is required. (Aws::CloudWatch::Errors::MissingParameter)
55
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from /usr/local/bundle/gems/aws-sdk-core-3.131.1/lib/aws-sdk-core/plugins/checksum_algorithm.rb:111:in `call'
56
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from /usr/local/bundle/gems/aws-sdk-core-3.131.1/lib/aws-sdk-core/plugins/jsonvalue_converter.rb:22:in `call'
57
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from /usr/local/bundle/gems/aws-sdk-core-3.131.1/lib/aws-sdk-core/plugins/idempotency_token.rb:19:in `call'
58
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from /usr/local/bundle/gems/aws-sdk-core-3.131.1/lib/aws-sdk-core/plugins/param_converter.rb:26:in `call'
59
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from /usr/local/bundle/gems/aws-sdk-core-3.131.1/lib/seahorse/client/plugins/request_callback.rb:71:in `call'
60
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from /usr/local/bundle/gems/aws-sdk-core-3.131.1/lib/aws-sdk-core/plugins/response_paging.rb:12:in `call'
61
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from /usr/local/bundle/gems/aws-sdk-core-3.131.1/lib/seahorse/client/plugins/response_target.rb:24:in `call'
62
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from /usr/local/bundle/gems/aws-sdk-core-3.131.1/lib/seahorse/client/request.rb:72:in `send_request'
63
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from /usr/local/bundle/gems/aws-sdk-cloudwatch-1.67.0/lib/aws-sdk-cloudwatch/client.rb:3365:in `put_metric_data'
64
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from /usr/local/bundle/gems/sidekiq-cloudwatchmetrics-2.6.0/lib/sidekiq/cloudwatchmetrics.rb:235:in `block in publish'
65
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from /usr/local/bundle/gems/sidekiq-cloudwatchmetrics-2.6.0/lib/sidekiq/cloudwatchmetrics.rb:234:in `each'
66
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from /usr/local/bundle/gems/sidekiq-cloudwatchmetrics-2.6.0/lib/sidekiq/cloudwatchmetrics.rb:234:in `each_slice'
67
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from /usr/local/bundle/gems/sidekiq-cloudwatchmetrics-2.6.0/lib/sidekiq/cloudwatchmetrics.rb:234:in `publish'
68
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from /usr/local/bundle/gems/sidekiq-cloudwatchmetrics-2.6.0/lib/sidekiq/cloudwatchmetrics.rb:77:in `run'
69
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from /usr/local/bundle/gems/sidekiq-6.4.2/lib/sidekiq/util.rb:56:in `watchdog'
70
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from /usr/local/bundle/gems/sidekiq-6.4.2/lib/sidekiq/util.rb:65:in `block in safe_thread'

[taimoordev]

@sj26 I suspect that these loops don't have guard statement, and these might be sending dimension value as nil
The parameter MetricData.member.12.Dimensions.member.1.Value is required. (Aws::CloudWatch::Errors::MissingParameter)

according to aws-sdk-cloudwatch doc, dimenstion is optional but for objects inside it, value and name must be present
official doc reference

[taimoordev]

@sj26 I found out the issue lies here

!!'' == true as empty string evaluates to true, that is why this dimension object contains blank value in it for tag.

Solution
add unless process['tag'].empty? check