ConcurrentModificationException in CapacityScheduler's LeafQueue

java.util.ConcurrentModificationException
at java.util.TreeMap$PrivateEntryIterator.nextEntry(TreeMap.java:1115)
at java.util.TreeMap$KeyIterator.next(TreeMap.java:1169)
at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.LeafQueue.collectSchedulerApplications(LeafQueue.java:1618)
at org.apache.hadoop.yarn.server.resourcemanager.scheduler.capacity.CapacityScheduler.getAppsInQueue(CapacityScheduler.java:1119)
at org.apache.hadoop.yarn.server.resourcemanager.ClientRMService.getQueueInfo(ClientRMService.java:798)
at org.apache.hadoop.yarn.api.impl.pb.service.ApplicationClientProtocolPBServiceImpl.getQueueInfo(ApplicationClientProtocolPBServiceImpl.java:234)
at org.apache.hadoop.yarn.proto.ApplicationClientProtocol$ApplicationClientProtocolService$2.callBlockingMethod(ApplicationClientProtocol.java:333)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2013)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2009)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2007)