Elasticsearch启动异常问题合集

1.future versions of Elasticsearch will require Java 11; your Java version from [/usr/local/jdk1.8.0_111/jre] does not meet this requirement

　　这个问题是因为Elasticsearch要求的jdk版本是java11 ，而本机安装的是java8。

解决方案:

　　安装jdk11，下载完毕后　

wget https://download.java.net/java/GA/jdk11/13/GPL/openjdk-11.0.1_linux-x64_bin.tar.gz

　　下载完毕后，将文件解压，放到指定文件夹

tar -zvxf openjdk-11.0.1_linux-x64_bin.tar.gz 
mv jdk-11.0.1 /opt

　　修改elasticsearch可执行文件：vim /usr/share/elasticsearch/bin/elasticsearch

#配置自己的jdk11
export JAVA_HOME=/opt/jdk-11.0.1
export PATH=$JAVA_HOME/bin:$PATH

#添加jdk判断
if [ -x "$JAVA_HOME/bin/java" ]; then
        JAVA="/opt/jdk-11.0.1/bin/java"
else
        JAVA=`which java`
fi

　　如下图配置，重新启动即可：

 

 

2.es安装好之后，使用root启动会报错：can not run elasticsearch as root

[root@iZbp1bb2egi7w0ueys548pZ bin]# ./elasticsearch
[2019-01-21T09:50:59,387][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:134) ~[elasticsearch-6.0.0.jar:6.0.0]
    at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:121) ~[elasticsearch-6.0.0.jar:6.0.0]
    at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:69) ~[elasticsearch-6.0.0.jar:6.0.0]
    at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:134) ~[elasticsearch-6.0.0.jar:6.0.0]
    at org.elasticsearch.cli.Command.main(Command.java:90) ~[elasticsearch-6.0.0.jar:6.0.0]
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:92) ~[elasticsearch-6.0.0.jar:6.0.0]
    at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:85) ~[elasticsearch-6.0.0.jar:6.0.0]
Caused by: java.lang.RuntimeException: can not run elasticsearch as root
    at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:104) ~[elasticsearch-6.0.0.jar:6.0.0]
    at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:171) ~[elasticsearch-6.0.0.jar:6.0.0]
    at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:322) ~[elasticsearch-6.0.0.jar:6.0.0]
    at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:130) ~[elasticsearch-6.0.0.jar:6.0.0]
    ... 6 more

原因：

　　为了安全不允许使用root用户启动，es5之后的都不能使用添加启动参数或者修改配置文件等方法启动了，必须要创建用户（使用yum安装，会自动创建elasticsearch用户，使用systemctl启动，不会出现该问题）。

解决：

　　1、创建用户：elasticsearch

[root@iZbp1bb2egi7w0ueys548pZ bin]# adduser elasticsearch

　　2、创建用户密码，需要输入两次

[root@iZbp1bb2egi7w0ueys548pZ bin]# passwd elasticsearch

　　3、将对应的文件夹权限赋给该用户

[root@iZbp1bb2egi7w0ueys548pZ local]# chown -R elasticsearch elasticsearch

　　4、切换至elasticsearch用户

[root@iZbp1bb2egi7w0ueys548pZ etc]# su elasticsearch

　　5、进入启动目录启动 /usr/share/elasticsearch/bin  使用后台启动方式：./elasticsearch -d

[elasticsearch@vmt10003 bin]$ ./elasticsearch -d

　　6、启动后测试

　　输入curl ip:9200,如果返回一个json数据说明启动成功