Hi, $subject happens in DAS-3.0.2-SNAPSHOT, when there are *no* meta-data/correlation-data defined in the stream definition.
Attached [1] is a PR with a fix. please review and merge. [1] https://github.com/wso2/carbon-analytics-common/pull/181 Thanks, Supun -- *Supun Sethunga* Software Engineer WSO2, Inc. http://wso2.com/ lean | enterprise | middleware Mobile : +94 716546324
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