ElasticSearch 5 安裝部署常見錯誤或問題

問題1:

uncaught exception in thread [main]
org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
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問題原因:不能使用root用戶啓動 
解決方案:改用別的用戶

問題2:

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.SystemCallFilter.linuxImpl(SystemCallFilter.java:350) ~[elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.SystemCallFilter.init(SystemCallFilter.java:638) ~[elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.JNANatives.tryInstallSystemCallFilter(JNANatives.java:215) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.Natives.tryInstallSystemCallFilter(Natives.java:99) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.Bootstrap.initializeNatives(Bootstrap.java:111) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.Bootstrap.setup(Bootstrap.java:204) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.Bootstrap.init(Bootstrap.java:360) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.Elasticsearch.init(Elasticsearch.java:123) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.Elasticsearch.execute(Elasticsearch.java:114) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.cli.EnvironmentAwareCommand.execute(EnvironmentAwareCommand.java:67) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.cli.Command.mainWithoutErrorHandling(Command.java:122) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.cli.Command.main(Command.java:88) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:91) [elasticsearch-5.4.0.jar:5.4.0]
        at org.elasticsearch.bootstrap.Elasticsearch.main(Elasticsearch.java:84) [elasticsearch-5.4.0.jar:5.4.0]
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原因:報了一大串錯誤,大家不必驚慌,其實只是一個警告,主要是因爲你Linux版本過低造成的。

解決方案: 
1、重新安裝新版本的Linux系統 
2、警告不影響使用,可以忽略

問題3:

ERROR: bootstrap checks failed
memory locking requested for elasticsearch process but memory is not locked
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原因:鎖定內存失敗

解決方案: 
切換到root用戶,編輯limits.conf配置文件, 添加類似如下內容: 
sudo vim /etc/security/limits.conf

添加如下內容: 
* soft memlock unlimited 
* hard memlock unlimited 
備註:* 代表Linux所有用戶名稱

保存、退出、重新登錄纔可生效 
臨時取消限制 
ulimit -l unlimited

問題4:

ERROR: bootstrap checks failed
max file descriptors [4096] for elasticsearch process is too low, increase to at least [65536]
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原因:無法創建本地文件問題,用戶最大可創建文件數太小

解決方案:

切換到root用戶,編輯limits.conf配置文件, 添加類似如下內容:
sudo vim /etc/security/limits.conf

添加如下內容:
* soft nofile 65536
* hard nofile 131072
備註:* 代表Linux所有用戶名稱
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保存、退出、重新登錄纔可生效

問題5:

max number of threads [1024] for user [es] is too low, increase to at least [2048] 
原因:無法創建本地線程問題,用戶最大可創建線程數太小 
解決方案:切換到root用戶,進入limits.d目錄下,修改90-nproc.conf 配置文件。

sudo vim /etc/security/limits.d/90-nproc.conf

找到如下內容: 
* soft nproc 1024

修改爲 
* soft nproc 2048

問題6:

max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144] 
原因:最大虛擬內存太小 
解決方案:切換到root用戶下,修改配置文件sysctl.conf

sudo vim /etc/sysctl.conf

添加下面配置: 
vm.max_map_count=655360

並執行命令: 
sysctl -p

問題7:

system call filters failed to install; check the logs and fix your configuration or disable system call filters at your own risk 
問題原因:因爲Centos6不支持SecComp

SecComp是Linux kernel (自從2.6.23版本之後)所支持的一種簡潔的sandboxing機制。它能使一個進程進入到一種“安全”運行模式,該模式下的進程只能調用4種系統調用(system calls),即read(), write(), exit()和sigreturn(),否則進程便會被終止。

而ES5.2以後的版本默認bootstrap.system_call_filter爲true進行檢測,所以導致檢測失敗,失敗後直接導致ES不能啓動。 
詳見 :https://github.com/elastic/elasticsearch/issues/22899 
System call filter settingedit 
Elasticsearch has attempted to install a system call filter since version 2.1.0. These are enabled by default and could be disabled via bootstrap.seccomp. The naming of this setting is poor since seccomp is specific to Linux but Elasticsearch attempts to install a system call filter on various operating systems. Starting in Elasticsearch 5.2.0, this setting has been renamed to bootstrap.system_call_filter. The previous setting is still support but will be removed in Elasticsearch 6.0.0.

解決方法:在elasticsearch.yml中配置bootstrap.system_call_filter爲false,注意要在Memory下面: 
bootstrap.memory_lock: false 
bootstrap.system_call_filter: false

問題8:

ElasticSearch啓動找不到主機或路由 
原因:ElasticSearch 單播配置有問題 
解決方案: 
檢查ElasticSearch中的配置文件 
vim config/elasticsearch.yml 
找到如下配置: 
discovery.zen.ping.unicast.hosts:[“192.168..:9300”,”192.168..:9300”] 
一般情況下,是這裏配置有問題,注意書寫格式

問題9:

org.elasticsearch.transport.RemoteTransportException: Failed to deserialize exception response from stream 
原因:ElasticSearch節點之間的jdk版本不一致 
解決方案:ElasticSearch集羣統一jdk環境ls

問題10:

Unsupported major.minor version 52.0 
原因:jdk版本問題太低 
解決方案:更換jdk版本,ElasticSearch5.0.0支持jdk1.8.0

問題11:

bin/elasticsearch-plugin install license 
ERROR: Unknown plugin license

原因:ElasticSearch5.0.0以後插件命令已經改變 
解決方案:使用最新命令安裝所有插件 
bin/elasticsearch-plugin install x-pack

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