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Purpose
Linked issue: close #2550
Add rate limit support for Spark streaming reads to control the number of offsets processed per micro-batch trigger.
Brief change log
scan.max.offsets.per.trigger,scan.min.offsets.per.trigger, andscan.max.trigger.delayconfig options inSparkFlussConfgetDefaultReadLimitinFlussMicroBatchStreamto return appropriateReadLimitbased on configmaxOffsets / numBuckets) can be used instead, if that's preferred.Tests
SparkStreamingTest#read: log table with maxOffsetsPerTrigger rate limitAPI and Format
New user-facing config options for Spark DataFrameReader:
scan.max.offsets.per.triggerscan.min.offsets.per.triggerscan.max.trigger.delayDocumentation
N/A, documentation update to be tracked separately.