elasticsearch启动错误整理
一、elasticsearch错误复现
(一)、环境
配置环境 OS:CentOS 7.4 64bit elasticsearch版本:5.4.1 hostname:elk-1-1 ip:10.18.43.170 java版本:java -version "1.8.0_181"
(二)、错误复现
首先要获取必须的软件包
wget -P /var/ftp/ https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.4.1.tar.gz wget --no-cookies --no-check-certificate --header "Cookie: gpw_e24=http%3A%2F%2Fwww.oracle.com%2F; oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u181-b13/96a7b8442fe848ef90c96a2fad6ed6d1/jdk-8u181-linux-x64.tar.gz"
环境配置
sed -ri '/^SELINUX/cSELINUX=disabled' /etc/selinux/config setenforce 0 firewall-cmd --permanent --add-service=http firewall-cmd --permanent --add-service=https firewall-cmd --permanent --add-port=9200/tcp firewall-cmd --permanent --add-port=9300/tcp firewall-cmd --reload
JDK配置
[root@elk-1-1 ~]# tar xf jdk-8u181-linux-x64.tar.gz -C /usr/local/ [root@elk-1-1 ~]# ln -s /usr/local/jdk1.8.0_181 /usr/local/java [root@elk-1-1 ~]# cat /etc/profile.d/java.sh JAVA_HOME=/usr/local/java PATH=$JAVA_HOME/bin:$PATH export JAVA_HOME PATH [root@elk-1-1 ~]# source /etc/profile [root@elk-1-1 ~]# env | grep JAVA JAVA_HOME=/usr/local/java [root@elk-1-1 ~]# java -version java version "1.8.0_181" Java(TM) SE Runtime Environment (build 1.8.0_181-b13) Java HotSpot(TM) 64-Bit Server VM (build 25.181-b13, mixed mode)
elasticsearch配置
useradd elk su - elk mv /tmp/elasticsearch-5.4.1.tar.gz /home/elk tar xf elasticsearch-5.4.1.tar.gz
配置文件elasticsearch-5.4.1/config/elasticsearch.yml
[elk@elk-1-1 ~]$ egrep "^[^#$]" elasticsearch-5.4.1/config/elasticsearch.yml cluster.name: my-elk node.name: elk1 path.data: /tmp/data path.logs: /tmp/logs bootstrap.memory_lock: false network.host: 0.0.0.0 http.port: 9200
elasticsearch不允许root用启动,我使用给他专门创建的用户elk用来启动它
[elk@elk-1-1 ~]$ elasticsearch-5.4.1/bin/elasticsearch -d
(三)、日志输出
[2018-07-27T19:19:16,089][ERROR][o.e.b.Bootstrap ] [elk1] node validation exception [3] bootstrap checks failed [1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536] [2]: memory locking requested for elasticsearch process but memory is not locked [3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
二、解决方法
错误一:
[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
解决方法:
打开/etc/security/limits.conf文件,在末尾添加以下两行并保存:
* soft nofile 65536 //*表示任意用户,这里是elasticsearch报的错,也可以直接填运行elk的用户; * hard nofile 131072
错误二:
[2]: memory locking requested for elasticsearch process but memory is not locked
解决方法:
修改elasticsearch.yml文件
bootstrap.memory_lock : false
错误三:
[3]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
解决方法:
修改内核配置/etc/sysctl.d/99-sysctl.conf添加vm.max_map_count=262144
sysctl -w vm.max_map_count=262144 sysctl -p
错误四:
os::commit_memory(0x00000001006cd000, 77824, 0) failed; error=’Cannot allocate memory’ (errno=12)
解决方法:
提供内存不足,增大主机内存或者减小elasticsearch的内存大小
[elk@elk-1-1 ~]$ grep -v "^#" elasticsearch-5.4.1/config/jvm.options |grep -v "^$" -Xms2g -Xmx2g -XX:+UseConcMarkSweepGC -XX:CMSInitiatingOccupancyFraction=75 -XX:+UseCMSInitiatingOccupancyOnly -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -server -Xss1m -Djava.awt.headless=true -Dfile.encoding=UTF-8 -Djna.nosys=true -Djdk.io.permissionsUseCanonicalPath=true -Dio.netty.noUnsafe=true -Dio.netty.noKeySetOptimization=true -Dio.netty.recycler.maxCapacityPerThread=0 -Dlog4j.shutdownHookEnabled=false -Dlog4j2.disable.jmx=true -Dlog4j.skipJansi=true -XX:+HeapDumpOnOutOfMemoryError
修改完成之后,建议退出当前登录用户,在重新登录,然后在重新启动elasticsearch,就可以一了,(注:tar包和unzip包,都是不允许elasticsearch程序让root用户来运行的,我们必须提前创建一个用户!)
=————-
http://192.168.75.188:9200/_cat/nodes?v
结果:{“error”:{“root_cause”:[{“type”:”master_not_discovered_exception”,”reason”:null}],”type”:”master_not_discovered_exception”,”reason”:null},”status”:503}
感谢大家,之前的问题自己已经解决,因为这个虚拟机是克隆过来的,所以需要将另外两个节点中的data目录下的所有文件删除即可。
https://blog.csdn.net/gamer_gy … 77189 附带这个链接,有详细解读一些坑
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