Caused by: java.lang.IllegalArgu

Caused by: java.lang.IllegalArgumentException: Limit of total fields [1000] in index [.monitoring-es-7-2020.11.19] has been exceeded
        at org.elasticsearch.index.mapper.MapperService.checkTotalFieldsLimit(MapperService.java:596) ~[elasticsearch-7.9.2.jar:7.9.2]
        at org.elasticsearch.index.mapper.MapperService.internalMerge(MapperService.java:525) ~[elasticsearch-7.9.2.jar:7.9.2]
        at org.elasticsearch.index.mapper.MapperService.internalMerge(MapperService.java:427) ~[elasticsearch-7.9.2.jar:7.9.2]
        at org.elasticsearch.index.mapper.MapperService.merge(MapperService.java:359) ~[elasticsearch-7.9.2.jar:7.9.2]
        at org.elasticsearch.action.bulk.TransportShardBulkAction.executeBulkItemRequest(TransportShardBulkAction.java:281) ~[elasticsearch-7.9.2.jar:7.9.2]
        at org.elasticsearch.action.bulk.TransportShardBulkAction$2.doRun(TransportShardBulkAction.java:164) ~[elasticsearch-7.9.2.jar:7.9.2]
        at org.elasticsearch.common.util.concurrent.AbstractRunnable.run(AbstractRunnable.java:37) ~[elasticsearch-7.9.2.jar:7.9.2]
        at org.elasticsearch.action.bulk.TransportShardBulkAction.performOnPrimary(TransportShardBulkAction.java:209) ~[elasticsearch-7.9.2.jar:7.9.2]

解决：

PUT .monitoring-es-7-2020.11.19/_settings
{
  "index.mapping.total_fields.limit": 2000
}