SPECjbb2015 is one of the most published Java benchmarks and is very complex with a large code base and many deployment categories. Customers noticed a significant number of run-time crashes with v1.03, which the Java committee attributed to a specific phase during the benchmark execution. Roshan Mangal undertook the task of debugging the root cause, spending weeks identifying and replicating the problem. He then proposed and tested a performance-neutral solution, which became the primary update in v1.04. This update reduced the number of crashes to almost zero, significantly improving the benchmark’s user experience.