java.lang.NullPointerException: null

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java.lang.NullPointerException: null
at gobblin.yarn.YarnService.handleContainerCompletion(YarnService.java:463)
at gobblin.yarn.YarnService.access$200(YarnService.java:93)
at gobblin.yarn.YarnService$AMRMClientCallbackHandler.onContainersCompleted(YarnService.java:527)

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