[Solved] Why does TestNG recommend setting thread-count carefully when configuring parallel execution? — Ans: Too high thread-count can cause resource exhaustion and flaky tests | Selenium Java

Selenium Java - TestNG Integration

Why does TestNG recommend setting thread-count carefully when configuring parallel execution?

AThread-count controls the number of test retries

BThread-count has no effect on test execution speed

CLow thread-count always causes tests to fail

DToo high thread-count can cause resource exhaustion and flaky tests

Step-by-Step Solution

Solution:

Step 1: Understand thread-count impact on resources
High thread-count means many threads run simultaneously, consuming CPU, memory, and browser instances.
Step 2: Recognize risks of too many threads
Excessive threads can overload system, causing slowdowns, flaky or failed tests due to resource contention.
Final Answer:
Too high thread-count can cause resource exhaustion and flaky tests -> Option D
Quick Check:
Set thread-count to balance speed and stability [OK]

Quick Trick: High thread-count risks resource exhaustion and flaky tests [OK]

Common Mistakes:

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Why does TestNG recommend setting thread-count carefully when configuring parallel execution?