Max parallelism test is failing

この issue には説明がありません。

Find the failing test named 'Max parallelism' or similar in the test suite. Run the test to see the failure output. Examine the mapreduce framework's concurrency control logic to understand what the test expects and why it's failing. Look at recent changes or the test's assumptions about parallelism limits.

索引モデルが issue の本文から書いたものです。