配置Elasticsearh 出现相关问题汇总

配置JDK1.8

使用wget 下载elasticsearch安装包
wget https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.6.8.tar.gz

解压
tar -zxvf elasticsearch-5.6.8.tar.gz
官网：https://www.elastic.co/products/elasticsearch

外网访问配置：
config目录下面elasticsearch.yml
修改为 network.host: 0.0.0.0

1、问题一

Java HotSpot(TM) 64-Bit Server VM warning: INFO: os::commit_memory(0x00000000c5330000, 986513408, 0) failed; error='Cannot allocate memory' (errno=12)
    #
    # There is insufficient memory for the Java Runtime Environment to continue.
    # Native memory allocation (mmap) failed to map 986513408 bytes for committing reserved memory.
    # An error report file with more information is saved as:
    # /usr/local/software/temp/elasticsearch-6.2.2/hs_err_pid1912.log

解决1：内存不够，购买阿里云的机器可以动态增加内存

解决2：内存不够，修改JVM内存 修改配置文件：/config/jvm.options将内存从2G调整为128M。

#-Xms2G
#-Xmx2G

-Xms128M
-Xmx128M

2、问题二

[root@iZwz95j86y235aroi85ht0Z bin]# ./elasticsearch
[2018-02-22T20:14:04,870][WARN ][o.e.b.ElasticsearchUncaughtExceptionHandler] [] uncaught exception in thread [main]
  org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
  at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:125) ~[elasticsearch-6.2.2.jar:6.2.2]
  at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:112) ~[elasticsearch-6.2.2.jar:6.2.2]
atorg.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:86) ~[elasticsearch-6.2.2.jar:6.2.2]
  at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:124) ~[elasticsearch-cli-6.2.2.jar:6.2.2]

解决：用非root用户

添加用户：useradd -m 用户名 然后设置密码 passwd 用户名

3、问题三

./elasticsearch
Exception in thread "main" java.nio.file.AccessDeniedException: /usr/local/software/temp/elasticsearch-6.2.2/config/jvm.options

解决：权限不够 chmod 777 -R 当前es目录

SpringBoot 整合 Elasticsearch：https://github.com/i-Javan/springboot/tree/master/movebrick-elasticsearch

SpringBoot 整合 Dubbo + Zookeeper ：https://github.com/i-Javan/springboot
SpringBoot 整合 Reids ：https://github.com/i-Javan/springboot/tree/master/movebrick-mybatis-annotation
SpringBoot 整合 Mybatis ：https://github.com/i-Javan/springboot/tree/master/movebrick-mybatis
SpringBoot 整合 MybatisPlus ：https://github.com/i-Javan/springboot/tree/master/movebrick-mybatisPlus
SpringBoot 整合 MybatisAnnotation ：https://github.com/i-Javan/springboot/tree/master/movebrick-mybatis-annotation
SpringBoot 整合 ActiveMQ：https://github.com/i-Javan/springboot/tree/master/movebrick-activeMQ