Elasticsearch 错误集锦

[TOC]

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# elasticsearch install example

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Error Elasticsearch 集锦
elasticsearch 5.4 安装过程中遇到了一些问题，通过查找资料几乎都解决掉了，这里简单记录一下 ，供以后查阅参考，也希望可以帮助遇到同样问题的你。

## 问题一：警告提示

```java
[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_SECCOMP and CONFIG_SECCOMP_FILTER compiled in at org.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] 报了一大串错误，其实只是一个警告。 解决：使用新的 linux版本，就不会出现此类问题了。

```

## 问题二：ERROR: bootstrap checks failed
```bash

max file descriptors [4096] for elasticsearch process likely too low, increase to at least [65536] max number of threads [1024] for user [lishang] likely too low, increase to at least [2048]

解决：切换到root用户，编辑limits.conf 添加类似如下内容
```

# vim /etc/security/limits.conf 
添加如下内容:

* * soft nofile 65536
  * * hard nofile 65536
OR blew code line
```bash
elasticsearch   soft    nofile  65536
elasticsearch   hard    nofile  65536

elasticsearch   soft    unlimited
elasticsearch   hard    unlimited

elasticsearch   soft    nproc   2048
elasticsearch   hard    nproc   4096
```

## 问题三：max number of threads [1024] for user [tester] likely too low, increase to at least [2048]

解决：切换到root用户，进入limits.d目录下修改配置文件。

# vim /etc/security/limits.d/90-nproc.conf 
修改如下内容：
```bash
  * * soft nproc 1024
```
#修改为
```bash
  * * soft nproc 2048
```

## 问题四：max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144] 解决：切换到root用户修改配置sysctl.conf

# vim /etc/sysctl.conf
添加下面配置：
```bash
vm.max_map_count=262144
```

并执行命令：
    #　sysctl -p
然后，重新启动elasticsearch，即可启动成功。

## 问题五 ： BootstrapCheck

2017-01-12T16:12:22,404][INFO ][o.e.b.BootstrapCheck ] [SfD5sIh] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks ERROR: bootstrap checks failed initial heap size [536870912] not equal to maximum heap size [1073741824]; this can cause resize pauses and prevents mlockall from locking the entire heap

解决方法：
    # vim config/jvm.options
###-Xms 和 -Xmx需要配置的相等，不然无法启动成功。
```bash
-Xms256m
-Xmx256m
```

## 问题六 ：

Exception in thread “main” ElasticsearchParseException[malformed, expected settings to start with 'object', instead was [VALUE_STRING]]

解决方法：

# vim /etc/elasticsearch/elasticsearch.yml
```bash
 #cluster.name: my-application
 cluster.name:ES-1  # 少了一个空格
 cluster.name: ES-1
 ```