Make requestUtilization map thread safe.#1850
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The
requestUtilizationsmap is iterated over when it gets loaded into a newHashMaphere:Singularity/SingularityService/src/main/java/com/hubspot/singularity/scheduler/SingularityLeaderCache.java
Line 460 in 2c77825
Because
requestUtilizationswasn't previously threadsafe, we'd get occasionalConcurrentModificationExceptions here.