elasticsearch常見錯誤整理

[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]

報了一大串錯誤，其實只是一個警告。

解決：使用新的linux版本，就不會出現此類問題了。

參考：http://www.cnblogs.com/sloveling/p/elasticsearch.html

文章其它部分：

問題二：ERROR: bootstrap checks failed

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]

解決：切換到root用戶，編輯limits.conf 添加類似如下內容

vi /etc/security/limits.conf 

添加如下內容:

* soft nofile 65536

* hard nofile 131072

* soft nproc 2048

* hard nproc 4096

問題三：max number of threads [1024] for user [elastic] likely too low, increase to at least [2048]

解決：切換到root用戶，進入limits.d目錄下修改配置文件。

vi /etc/security/limits.d/90-nproc.conf 

修改如下內容：

* soft nproc 1024

#修改爲

* soft nproc 2048

問題四：max virtual memory areas vm.max_map_count [65530] likely too low, increase to at least [262144]

解決：切換到root用戶修改配置sysctl.conf

vi /etc/sysctl.conf 

添加下面配置：

vm.max_map_count=655360

並執行命令：

sysctl -p

然後，重新啓動elasticsearch，即可啓動成功。