ELK 学习笔记之 elasticsearch启动时Warning解决办法

elasticsearch启动时Warning解决办法:

转载:http://www.dajiangtai.com/community/18136.do?origin=csdn-geek&dt=1214

问题一:

 
[2016-11-06T16:27:21,712][WARN ][o.e.b.JNANatives ] unable to install syscall filter:
 
Java.lang.UnsupportedOperationException: seccomp unavailable: requires kernel 3.5+ with CONFIG_SECCOMPandCONFIG_SECCOMP_FILTERcompiledinatorg.elasticsearch.bootstrap.Seccomp.linuxImpl(Seccomp.java:349) ~[elasticsearch-5.0.0.jar:5.0.0]
 
at org.elasticsearch.bootstrap.Seccomp.init(Seccomp.java:630) ~[elasticsearch-5.0.0.jar:5.0.0]
 
原因:报了一大串错误,大家不必惊慌,其实只是一个警告,主要是因为你Linux版本过低造成的。
 
解决方案:
1、重新安装新版本的Linux系统
2、警告不影响使用,可以忽略
 
问题二:
ERROR: bootstrap checks failed
 
max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536]
 
原因:无法创建本地文件问题,用户最大可创建文件数太小
 
解决方案:
切换到root用户,编辑limits.conf配置文件, 添加类似如下内容:
 
vi /etc/security/limits.conf
 
添加如下内容:
*  soft nofile 65536
 
* hard nofile 131072
 
* soft nproc 2048
 
* hard nproc 4096
备注:* 代表Linux所有用户名称(比如 hadoop)
 
保存、退出、重新登录才可生效
 
问题三:
max number of threads [1024] for user [es] likely too low, increase to at least [2048]
原因:无法创建本地线程问题,用户最大可创建线程数太小
解决方案:切换到root用户,进入limits.d目录下,修改90-nproc.conf 配置文件。
 
vi /etc/security/limits.d/90-nproc.conf
 
找到如下内容:
 
* soft nproc 1024
 
#修改为
 
* soft nproc 2048
 
问题四:
max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]
原因:最大虚拟内存太小
解决方案:切换到root用户下,修改配置文件sysctl.conf
 
vi /etc/sysctl.conf
 
添加下面配置:
 
vm.max_map_count=655360
 
并执行命令:
 
sysctl -p
 
然后重新启动elasticsearch,即可启动成功。
 
问题五:
ElasticSearch启动找不到主机或路由
原因:ElasticSearch 单播配置有问题
解决方案:
检查ElasticSearch中的配置文件
vi  config/elasticsearch.yml
找到如下配置:
 
discovery.zen.ping.unicast.hosts:["192.168.**.**:9300","192.168.**.**:9300"]
一般情况下,是这里配置有问题,注意书写格式
 
问题六:
org.elasticsearch.transport.RemoteTransportException: Failed to deserialize exception response from stream
 
原因:ElasticSearch节点之间的jdk版本不一致
 
解决方案:ElasticSearch集群统一jdk环境
 
问题七:
Unsupported major.minor version 52.0
 
原因:jdk版本问题太低
解决方案:更换jdk版本,ElasticSearch5.0.0支持jdk1.8.0
 
问题八:
bin/elasticsearch-plugin install license
ERROR: Unknown plugin license
 
原因:ElasticSearch5.0.0以后插件命令已经改变
解决方案:使用最新命令安装所有插件

bin/elasticsearch-plugin install x-pack

问题九:

ERROR: bootstrap checks failed
max file descriptors [65535] for elasticsearch process likely too low, increase to at least [65536]
memory locking requested for elasticsearch process but memory is not locked
max number of threads [1024] for user [jason] likely too low, increase to at least [2048]
max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]
system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk

> vim /etc/security/limits.conf
...
elasticsearch hard nofile 65536 # 针对 max file descriptors
elasticsearch soft nproc 2048 # 针对 max number of threads

> vim /etc/sysctl.conf
...
vm.max_map_count=262144 # 针对 max virtual memory areas

> vim /etc/elasticsearch/elasticsearch.yml

...
bootstrap.system_call_filter: false # 针对 system call filters failed to install, 参见 https://www.elastic.co/guide/en/elasticsearch/reference/current/system-call-filter-check.html

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