Issue: Event visualization dashboards do not display data and the following message is displayed in the Elasticsearch cluster log:
java.lang.OutOfMemoryError: Java heap space
Fix: Perform any of the following:
Increase Elasticsearch heap size in the /etc/elasticsearch/jvm.options file.
Increase the number of shards by modifying the es.num.shards property. For more information, see Performance Tuning for Elasticsearch
in the Sentinel Installation and Configuration Guide.