diff --git a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/attempt/RMAppAttemptMetrics.java b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/attempt/RMAppAttemptMetrics.java index 015cff7a960..397cdbcfe5c 100644 --- a/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/attempt/RMAppAttemptMetrics.java +++ b/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/rmapp/attempt/RMAppAttemptMetrics.java @@ -20,6 +20,7 @@ import java.util.HashMap; import java.util.Map; +import java.util.concurrent.ConcurrentHashMap; import java.util.concurrent.atomic.AtomicBoolean; import java.util.concurrent.atomic.AtomicInteger; import java.util.concurrent.atomic.AtomicLong; @@ -53,8 +54,8 @@ private ReadLock readLock; private WriteLock writeLock; - private Map resourceUsageMap = new HashMap<>(); - private Map preemptedResourceMap = new HashMap<>(); + private Map resourceUsageMap = new ConcurrentHashMap<>(); + private Map preemptedResourceMap = new ConcurrentHashMap<>(); private RMContext rmContext; private int[][] localityStatistics =