Eric Payne created YARN-7051:
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Summary: FifoIntraQueuePreemptionPlugin can get concurrent
modification exception/
Key: YARN-7051
URL: https://issues.apache.org/jira/browse/YARN-7051
Project: Hadoop YARN
Issue Type: Bug
Affects Versions: 3.0.0-alpha3, 2.8.1, 2.9.0
Reporter: Eric Payne
Priority: Critical
{{FifoIntraQueuePreemptionPlugin#calculateUsedAMResourcesPerQueue}} has the
following code:
{code}
Collection<FiCaSchedulerApp> runningApps = leafQueue.getApplications();
Resource amUsed = Resources.createResource(0, 0);
for (FiCaSchedulerApp app : runningApps) {
{code}
{{runningApps}} is unmodifiable but not concurrent. This caused the preemption
monitor thread to crash in the RM in one of our clusters.
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