我升级了Ambari版本2.4.0
之后，当组件严重，正常，警告等时，我无法收到任何电子邮件通知。
以下是我发现问题的方法。
我停了一个regionserver。
之后，我跑了命令
curl --user admin：passwd http://myurl:8080/api/v1/cluster/ {clustername} / alert_notices？fields = *
[结果]
{“href”：myurl， “项目”：[] }
[ambari-的server.log]
23 Nov 2016 16:58:00,259 INFO [ambari-client-thread-102] AbstractResourceProvider:925 - Received a updateHostComponent request, clusterName=, serviceName=HDFS, componentName=DATANODE, hostname=, request={ clusterName=, serviceName=HDFS, componentName=DATANODE, hostname=, desiredState=STARTED, state=null, desiredStackId=null, staleConfig=null, adminState=null}
23 Nov 2016 16:58:00,265 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: SQOOP
23 Nov 2016 16:58:00,265 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: HDFS
23 Nov 2016 16:58:00,265 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: MAPREDUCE2
23 Nov 2016 16:58:00,265 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: OOZIE
23 Nov 2016 16:58:00,265 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: TEZ
23 Nov 2016 16:58:00,266 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: SPARK
23 Nov 2016 16:58:00,266 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: HBASE
23 Nov 2016 16:58:00,266 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: ZOOKEEPER
23 Nov 2016 16:58:00,266 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: YARN
23 Nov 2016 16:58:00,266 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: PIG
23 Nov 2016 16:58:00,267 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: HIVE
23 Nov 2016 16:58:00,267 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: SLIDER
23 Nov 2016 16:58:00,267 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: AMBARI_METRICS
23 Nov 2016 16:58:00,267 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2140 - Iterating service type Instance in createHostAction:: NIFI
23 Nov 2016 16:58:00,282 INFO [ambari-client-thread-102] AmbariManagementControllerImpl:2329 - AmbariManagementControllerImpl.createHostAction: created ExecutionCommand for host , role DATANODE, roleCommand START, and command ID 897--1, with cluster-env tags version1479886775473
23 Nov 2016 16:58:00,301 INFO [ambari-action-scheduler] ServiceComponentHostImpl:1067 - Host role transitioned to a new state, serviceComponentName=DATANODE, hostName=, oldState=INSTALLED, currentState=STARTING
23 Nov 2016 16:58:00,441 INFO [ambari-client-thread-102] AbstractProviderModule:953 - Current Metrics collector Host : null
23 Nov 2016 16:58:00,441 INFO [ambari-client-thread-102] AbstractProviderModule:958 - New Metrics collector Host :
23 Nov 2016 16:58:00,951 INFO [qtp-ambari-agent-91] HeartBeatHandler:332 - HeartBeatHandler.sendCommands: sending ExecutionCommand for host , role DATANODE, roleCommand START, and command ID 897-0, task ID 7953
23 Nov 2016 16:58:06,679 INFO [ambari-heartbeat-processor-0] HeartbeatProcessor:505 - Updating applied config on service HDFS, component DATANODE, host
23 Nov 2016 16:58:06,681 INFO [ambari-heartbeat-processor-0] ServiceComponentHostImpl:1067 - Host role transitioned to a new state, serviceComponentName=DATANODE, hostName=, oldState=STARTING, currentState=STARTED
另外，我多次重启ambari服务器，但我无法解决它。
我该如何解决这个问题？