What Happens If You Don't Specify "checkpointLocation" in Structured Streaming on Azure?

Correct Answer: A

You need to set checkpointLocation for many sinks utilized in Structured Streaming.

For the sinks where this setting is optional, if you don't set this value, you are at risk of losing your place in the stream.

Option A is correct.

If you don't specify the command option ("checkpointLocation", pointer-to-checkpoint directory) in Structured Streaming, With the stoppage of the streaming job, all state data around the streaming job is lost and on the restart, the job must start from scratch.

Option B is incorrect.

The given statement is not the potential result of not specifying the command option ("checkpointLocation", pointer-to-checkpoint directory) in Structured Streaming.

Option C is incorrect.

The statement is not a potential outcome of the given scenario.

Option D is incorrect.

The given statement is not the potential result of not specifying the command option ("checkpointLocation", pointer-to-checkpoint directory) in Structured Streaming.

Reference:

To know more about checkpoint storage in structured streaming, please visit the below-given link:

In Structured Streaming, checkpointing is a critical feature that provides fault tolerance and failure recovery for long-running streaming queries. It allows the system to recover the state of the streaming job in the event of a failure or system outage.

Checkpointing involves periodically saving the state of the streaming job to a reliable distributed storage system, such as HDFS or Azure Blob Storage. This state includes the metadata of the processing logic, such as the offsets of input sources, the progress of window operations, and the state of any aggregations.

If the "checkpointLocation" option is not specified in a streaming query, then the default behavior is that checkpointing will be disabled for that query. This means that in the event of a failure or system outage, all state data around the streaming job will be lost. When the job restarts, it must start from scratch, re-reading all input data from the beginning and re-creating all of its internal state.

So, the correct answer to this question is A. If you don't specify the "checkpointLocation" option in Structured Streaming, with the stoppage of the streaming job, all state data around the streaming job is lost, and on the restart, the job must start from scratch.

Option B is incorrect because there is no default location where state data is dumped when checkpointing is not enabled. Option C is incorrect because the ability to create multiple streaming queries that utilize the same source is not related to the "checkpointLocation" option. Option D is also incorrect because checkpointing is a critical feature in Structured Streaming, and its absence can lead to data loss and inconsistent results.