The correct answer is to enable the 'Refresh conflict detection' setting on the dataset. This error, "The operation was canceled because the session was terminated by a concurrent operation," occurs when an XMLA endpoint initiates a refresh while another refresh is already running on the same dataset, causing a session conflict. By enabling conflict detection, Power BI queues or blocks overlapping refresh requests, ensuring the XMLA-triggered refresh completes without interruption. On the PL-300 exam, this scenario tests your understanding of XMLA endpoint management and dataset refresh behavior in Premium workspaces—a common trap is assuming you need to partition the dataset or increase capacity, but the root cause is concurrent operations, not resource limits. Remember the memory tip: "Conflict detection stops the collision," meaning it prevents two refreshes from crashing into each other.
PL-300 Deploy and maintain assets Practice Question
This PL-300 practice question tests your understanding of deploy and maintain assets. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
You are a Power BI administrator for a large organization. A team has published a shared dataset to a Premium workspace. They use an XMLA endpoint to programmatically refresh the dataset daily. Recently, the refresh started failing with the error: 'The operation was canceled because the session was terminated by a concurrent operation.' The dataset is not partitioned. You need to ensure the refresh completes without errors. What should you do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable the 'Refresh conflict detection' setting on the dataset to prevent concurrent operations.
The error 'The operation was canceled because the session was terminated by a concurrent operation' indicates that two refresh operations are conflicting on the same dataset. Enabling 'Refresh conflict detection' on the dataset prevents concurrent refreshes by queuing or blocking overlapping operations, ensuring the XMLA-triggered refresh completes without interruption.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✗
Remove all scheduled refreshes and rely solely on the XMLA script.
Why it's wrong here
This does not prevent concurrent XMLA script runs from different sessions.
✓
Enable the 'Refresh conflict detection' setting on the dataset to prevent concurrent operations.
Why this is correct
This setting detects and blocks overlapping refresh operations, preventing the error.
Related concept
Read the scenario before looking for a memorised answer.
✗
Change the XMLA script to run less frequently, e.g., once per week.
Why it's wrong here
Reducing frequency doesn't resolve the concurrency issue when multiple runs occur simultaneously.
✗
Partition the dataset and refresh partitions sequentially.
Why it's wrong here
Partitioning helps with performance but doesn't address the concurrency conflict.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume the error is caused by the XMLA script itself (e.g., frequency or scheduling) and overlook the fact that the conflict is due to concurrent operations, which is directly solved by enabling conflict detection rather than changing the script's schedule or partitioning strategy.
Detailed technical explanation
How to think about this question
Under the hood, Power BI Premium datasets use XMLA endpoints that support multiple concurrent sessions, but the dataset's internal lock mechanism can terminate a session if another operation (e.g., a scheduled refresh, another XMLA script, or a user-initiated refresh) starts on the same dataset. The 'Refresh conflict detection' setting, when enabled, serializes refresh operations by queuing them, preventing the 'session terminated' error. In real-world scenarios, this is critical for teams that combine automated XMLA scripts with scheduled refreshes or ad-hoc user refreshes, as it ensures data consistency without manual intervention.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Deploy and maintain assets — This question tests Deploy and maintain assets — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable the 'Refresh conflict detection' setting on the dataset to prevent concurrent operations. — The error 'The operation was canceled because the session was terminated by a concurrent operation' indicates that two refresh operations are conflicting on the same dataset. Enabling 'Refresh conflict detection' on the dataset prevents concurrent refreshes by queuing or blocking overlapping operations, ensuring the XMLA-triggered refresh completes without interruption.
What should I do if I get this PL-300 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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