解决：启动时调整内存分配 -e "ES_JAVA_OPTS=-Xms512m -Xmx512m"
参考命令： docker run -p 9200:9200 -p 9300:9300 --name elasticsearch \ -e "ES_JAVA_OPTS=-Xms512m -Xmx512m" \ -e "discovery.type=single-node" \ -e "cluster.name=elasticsearch" \ -v /mydata/elasticsearch/plugins:/usr/share/elasticsearch/plugins \ -v /mydata/elasticsearch/data:/usr/share/elasticsearch/data \ -d elasticsearch:7.6.2
