ES三节点重启后报错no known master node

问题

一直在研究ES的监控怎么做，想偷点懒，不去通过API获取然后计算，就想找个现成的插件或者监控软件，只要装个agent就可以，然后就找到了x-pack，插件装好了之后，需要重启ES集群，线上的ES集群我想着既然是集群一台一台重启应该不会有问题的，太高估了，重启一台后，整个集群挂了......

 

操作过程

1、系统

[centos@ip---- bin]$ cat /etc/redhat-release
CentOS Linux release 7.6. (Core) 

2、ES版本

[centos@ip---- bin]$ ./elasticsearch --version
Version: 5.0., Build: f6b4951/--24T10::.101Z, JVM: 1.8.0_131

3、杀进程

ps -ef | grep pid
kill - pid

这样操作完就后悔了，不是每个服务都是这么杀的，不知道这步操作对集群挂了有没有一定的影响。

4、报错信息

[--17T08::,][INFO ][o.e.p.PluginsService     ] [node-] loaded module [lang-painless]
[--17T08::,][INFO ][o.e.p.PluginsService     ] [node-] loaded module [percolator]
[--17T08::,][INFO ][o.e.p.PluginsService     ] [node-] loaded module [reindex]
[--17T08::,][INFO ][o.e.p.PluginsService     ] [node-] loaded module [transport-netty3]
[--17T08::,][INFO ][o.e.p.PluginsService     ] [node-] loaded module [transport-netty4]
[--17T08::,][INFO ][o.e.p.PluginsService     ] [node-] no plugins loaded
[--17T08::,][INFO ][o.e.n.Node               ] [node-] initialized
[--17T08::,][INFO ][o.e.n.Node               ] [node-] starting ...
[--17T08::,][INFO ][o.e.t.TransportService   ] [node-] publish_address {172.0.0.16:}, bound_addresses {172.30.36.146:}
[--17T08::,][INFO ][o.e.b.BootstrapCheck     ] [node-] bound or publishing to a non-loopback or non-link-local address, enforcing bootstrap checks

[--17T08::,][WARN ][o.e.n.Node               ] [node-] timed out while waiting for initial discovery state - timeout: 30s
[--17T08::,][INFO ][o.e.h.HttpServer         ] [node-] publish_address {172.0.0.16:}, bound_addresses {172.30.36.146:}
[--17T08::,][INFO ][o.e.n.Node               ] [node-] started
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.c.s.TransportClusterStateAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.c.s.TransportClusterStateAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.c.s.TransportClusterStateAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.i.c.TransportCreateIndexAction] [node-] no known master node, scheduling a retry
[--17T08::,][DEBUG][o.e.a.a.c.s.TransportClusterStateAction] [node-] timed out while retrying [cluster:monitor/state] after failure (timeout [30s])
[--17T08::,][DEBUG][o.e.a.a.c.s.TransportClusterStateAction] [node-] timed out while retrying [cluster:monitor/state] after failure (timeout [30s])
[--17T08::,][WARN ][r.suppressed             ] path: /_cluster/state/metadata, params: {metric=metadata}
org.elasticsearch.discovery.MasterNotDiscoveredException
    at org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$.onTimeout(TransportMasterNodeAction.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.cluster.ClusterStateObserver$ContextPreservingListener.onTimeout(ClusterStateObserver.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.cluster.service.ClusterService$NotifyTimeout.run(ClusterService.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:) [elasticsearch-5.0..jar:5.0.]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:) [?:1.8.0_151]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:) [?:1.8.0_151]
    at java.lang.Thread.run(Thread.java:) [?:1.8.0_151]
[--17T08::,][WARN ][r.suppressed             ] path: /_cluster/state/metadata, params: {metric=metadata}
org.elasticsearch.discovery.MasterNotDiscoveredException
    at org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$.onTimeout(TransportMasterNodeAction.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.cluster.ClusterStateObserver$ContextPreservingListener.onTimeout(ClusterStateObserver.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.cluster.service.ClusterService$NotifyTimeout.run(ClusterService.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:) [elasticsearch-5.0..jar:5.0.]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:) [?:1.8.0_151]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:) [?:1.8.0_151]
    at java.lang.Thread.run(Thread.java:) [?:1.8.0_151]
[--17T08::,][DEBUG][o.e.a.a.c.s.TransportClusterStateAction] [node-] timed out while retrying [cluster:monitor/state] after failure (timeout [30s])
[--17T08::,][WARN ][r.suppressed             ] path: /_cluster/state/metadata, params: {metric=metadata}
org.elasticsearch.discovery.MasterNotDiscoveredException
    at org.elasticsearch.action.support.master.TransportMasterNodeAction$AsyncSingleAction$.onTimeout(TransportMasterNodeAction.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.cluster.ClusterStateObserver$ContextPreservingListener.onTimeout(ClusterStateObserver.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.cluster.ClusterStateObserver$ObserverClusterStateListener.onTimeout(ClusterStateObserver.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.cluster.service.ClusterService$NotifyTimeout.run(ClusterService.java:) [elasticsearch-5.0..jar:5.0.]
    at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:) [elasticsearch-5.0..jar:5.0.]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:) [?:1.8.0_151]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:) [?:1.8.0_151]
    at java.lang.Thread.run(Thread.java:) [?:1.8.0_151]

 

 

5、配置文件

cluster.name: lile
node.name: node-
bootstrap.memory_lock: true
network.host: 172.0.0.16
http.port:
discovery.zen.ping.unicast.hosts: ["172.0.0.16","172.0.0.17","172.0.0.18"]
discovery.zen.minimum_master_nodes:
http.cors.enabled: true
http.cors.allow-origin: "*"
path.data: /data/elasticsearch/data
path.logs: /data/elasticsearch/logs

三、解决办法

各种重启都没有，在网上查到的，都是重启就好了，但是使劲的重启也没好。但是当discovery.zen.minimum_master_nodes这个值设置为1的时候，可以启动成功，但是三台都成了master了。后来看到有个这个参数，加上然后全部重启就好了。

 

 

discovery.zen.ping_timeout: 60s

四、分析原因

还没细究，感觉是集群互相查找的时间太短了，没有找到对方，因为得2台才能形成集群