Question 550
A platform monitors several stateful event-processing queries against a latency SLO. After configuring Compare before/after checkpointed offsets and processing progress, the engineer must validate: A query restarts and must be proven to resume from its prior committed offset. What evidence is decisive?
Explanation
Correct Answer
The restarted source offset starts after prior committed progress is the matching outcome for the implemented control (Compare before/after checkpointed offsets and processing progress) and the stated requirement “A query restarts and must be proven to resume from its prior committed offset.”
Incorrect Answers
State rows and processing time increase together for affected batches pertains to a different control (Inspect streaming state operator metrics and batch execution durations) and a different need (A microbatch duration spikes after an increase in state cardinality). It cannot establish that Compare before/after checkpointed offsets and processing progress met the stated goal.
That observation is a valid indicator for “A stream seems healthy but event processing falls farther behind incoming data” when using Compare input rate and processed-rows rate in streaming progress. The scenario instead tests “A query restarts and must be proven to resume from its prior committed offset”; the relevant result is The restarted source offset starts after prior committed progress.
Dropped record count reflects events older than the configured cutoff would demonstrate the separate action Inspect watermark position and dropped-late-record progress counters, which addresses “Late-data drops rise after a watermark configuration change.” It does not verify the requirement “A query restarts and must be proven to resume from its prior committed offset” following Compare before/after checkpointed offsets and processing progress.