1.OpenJDK 64-Bit Server VM warning: If the number of processors is expected to increase from one, then you should configure the number of parallel GC threads appropriately using -XX:ParallelGCThreads=N
解决方案:
2.java.lang.RuntimeException: don't run elasticsearch as root
解决方案: 增加一个专用用户
1). adduser es
2). passwd es
3).chown -R es:es [es目录]
通过es账户启动
3.max virtual memory areas vm.max_map_count [65530]is too low, increase to at least [262144]
解决方案:
修改/etc/sysctl.conf配置文件，添加vm.max_map_count=262144,重启或重新加载配置
4.max file descriptors [65535] for elasticsearchprocess is too low, increase to at least [65536]
解决方案:
修改/etc/security/limits.conf文件,把所有的65535改到65536
5.外网访问
解决方案: 修改elasticsearch.yml文件 增加 network.host :0.0.0.0 ,外加防火墙开启9200端口