Yarn GetApplicationsAvgTime stuck a long time

"beans" : [ {
"name" : "Hadoop:service=ResourceManager,name=RpcDetailedActivityForPort8032",
"modelerType" : "RpcDetailedActivityForPort8032",
"tag.port" : "8032",
"tag.Context" : "rpcdetailed",
"tag.Hostname" : "XXXXX",
"ApplicationNotFoundExceptionNumOps" : 531,
"ApplicationNotFoundExceptionAvgTime" : 0.0,
"SubmitApplicationNumOps" : 2085,
"SubmitApplicationAvgTime" : 0.34374999999999994,
"GetApplicationReportNumOps" : 297647,
"GetApplicationReportAvgTime" : 0.0,
"GetNewApplicationNumOps" : 2163,
"GetNewApplicationAvgTime" : 0.0,
"GetApplicationsNumOps" : 102,
"GetApplicationsAvgTime" : 15999.0,
"GetClusterMetricsNumOps" : 2405,
"GetClusterMetricsAvgTime" : 0.01801801801801802,
"GetDelegationTokenNumOps" : 33,
"GetDelegationTokenAvgTime" : 0.0,
"GetClusterNodesNumOps" : 2400,
"GetClusterNodesAvgTime" : 80.5403726708074,
"GetQueueInfoNumOps" : 1900,
"GetQueueInfoAvgTime" : 1212.0089153046054,
"GetQueueUserAclsNumOps" : 1900,
"GetQueueUserAclsAvgTime" : 1.1819444444444458,
"ForceKillApplicationNumOps" : 199,
"ForceKillApplicationAvgTime" : 0.3688524590163933