When we make monitor rule, something failure happen

Plugins Alerting
1

Currently we are constructing the following environment.

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25897×741 41 KB

And when we make monitor rule, the following error happen.
Does anyone meet the same situation??

[2019-12-02T16:19:25,240][ERROR][c.a.o.a.MonitorRunner ] [elasticsearch-cordinating-only-node-host] Error loading alerts for monitor: na
org.elasticsearch.transport.RemoteTransportException: [elasticsearch-master-node-host][100.73.150.53:9300][indices:admin/create]
Caused by: org.elasticsearch.index.mapper.MapperParsingException: Failed to parse mapping [_doc]: Root mapping definition has unsupported parameters: [_doc : {}]
at org.elasticsearch.index.mapper.MapperService.internalMerge(MapperService.java:398) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.index.mapper.MapperService.merge(MapperService.java:327) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$IndexCreationTask.execute(MetaDataCreateIndexService.java:476) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.ClusterStateUpdateTask.execute(ClusterStateUpdateTask.java:47) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.MasterService.executeTasks(MasterService.java:687) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.MasterService.calculateTaskOutputs(MasterService.java:310) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.MasterService.runTasks(MasterService.java:210) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.MasterService$Batcher.run(MasterService.java:142) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.TaskBatcher.runIfNotProcessed(TaskBatcher.java:150) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.TaskBatcher$BatchedTask.run(TaskBatcher.java:188) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:688) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:252) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:215) ~[elasticsearch-7.2.0.jar:7.2.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]
at java.lang.Thread.run(Thread.java:835) ~[?:?]
Caused by: org.elasticsearch.index.mapper.MapperParsingException: Root mapping definition has unsupported parameters: [_doc : {}]
at org.elasticsearch.index.mapper.DocumentMapperParser.checkNoRemainingFields(DocumentMapperParser.java:148) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.index.mapper.DocumentMapperParser.parse(DocumentMapperParser.java:136) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.index.mapper.DocumentMapperParser.parse(DocumentMapperParser.java:88) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.index.mapper.MapperService.internalMerge(MapperService.java:396) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.index.mapper.MapperService.merge(MapperService.java:327) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.metadata.MetaDataCreateIndexService$IndexCreationTask.execute(MetaDataCreateIndexService.java:476) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.ClusterStateUpdateTask.execute(ClusterStateUpdateTask.java:47) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.MasterService.executeTasks(MasterService.java:687) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.MasterService.calculateTaskOutputs(MasterService.java:310) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.MasterService.runTasks(MasterService.java:210) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.MasterService$Batcher.run(MasterService.java:142) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.TaskBatcher.runIfNotProcessed(TaskBatcher.java:150) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.cluster.service.TaskBatcher$BatchedTask.run(TaskBatcher.java:188) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:688) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.runAndClean(PrioritizedEsThreadPoolExecutor.java:252) ~[elasticsearch-7.2.0.jar:7.2.0]
at org.elasticsearch.common.util.concurrent.PrioritizedEsThreadPoolExecutor$TieBreakingPrioritizedRunnable.run(PrioritizedEsThreadPoolExecutor.java:215) ~[elasticsearch-7.2.0.jar:7.2.0]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]
at java.lang.Thread.run(Thread.java:835) ~[?:?]

2

I could realize cause of this issue.
Somehow the following default mapping template was cause of this issue…

{
   "order": -1,
   "index_patterns": "*",
   "settings": {
     "index": {
         "refresh_interval": "30s",
         "store": {
           "type": "niofs"
         },
      "number_of_shards": "5",
      "number_of_replicas": "1"
     }
   },
   "mappings": {},
   "aliases": {}
}

After deleting this mapping template, issue was fixed somehow lol
Does anyone can know why this issue was happened???