Hi all, I am working on following two alert generation scenarios,
1. Abnormal response time/ backend time - If an API response time or the backend time lies outside the Xth percentile. 2. Abnormal request counts - Count the number of requests during last minute and check if it lies outside the Xth percentile. Initially, we thought of having a summarization job to calculate the percentile values daily. However, in DAS, spark doesn't have OOB support to calculate percentile even though hive has that as a built-in aggregate function. With DAS 3.0.1 we can define UDFs (User Defined Functions), but the function 'percentile' is a user-defined aggregation function (UDAF). Hence, we cannot use that approach as well. Is there an alternative way in DAS to define custom aggregation function? Thanks, Sachini -- *Thanks & Regards,Sachini JayasekaraSoftware Engineer; **WSO2 Inc. * *lean . enterprise . middleware | http://wso2.com <http://wso2.com> * Mobile : +94712371165
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