What happens if you schedule a punctuator with STREAM_TIME but the stream has no new records arriving?

medium📝 Predict Output Q5 of 15

Kafka - Advanced Stream Processing

AThe punctuator triggers immediately once and then stops.

BThe punctuator will not be triggered until new records advance the stream time.

CThe punctuator triggers at fixed intervals regardless of records.

DThe stream processing crashes with an error.

Step-by-Step Solution

Solution:

Step 1: Understand STREAM_TIME punctuator behavior
STREAM_TIME triggers based on the progress of the stream's event time, which advances only when new records arrive.
Step 2: Analyze effect of no new records
If no new records arrive, stream time does not advance, so the punctuator does not trigger.
Final Answer:
The punctuator will not be triggered until new records advance the stream time. -> Option B
Quick Check:
STREAM_TIME triggers only on new record timestamps [OK]

Quick Trick: STREAM_TIME depends on record timestamps advancing [OK]

Common Mistakes:

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