# Elasticsearch start ：failed to resolve host \[host1\] **URL:** \ **Category:** Elasticsearch\ **Created:** [June 19, 2018, 3:18am UTC](https://discuss.elastic.co/t/elasticsearch-start-failed-to-resolve-host-host1/136399 "2018-06-19T03:18:41Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![SimpleCC](https://avatars.discourse-cdn.com/v4/letter/s/cab0a1/32.png) [@SimpleCC](https://discuss.elastic.co/u/SimpleCC)\ **Post date:** [June 19, 2018, 3:18am UTC](https://discuss.elastic.co/t/elasticsearch-start-failed-to-resolve-host-host1/136399/1 "2018-06-19T03:18:42Z")
I deploy my project on the cloud server.My OS is Linux. I launch the Elasticsearch and recieve the log: ``` [2018-06-19T10:57:01,485][INFO][o.e.t.TransportService] [OYN0im5] publish_address {172.18.183.220:9300}, bound_addresses {172.18.183.220:9300} [2018-06-19T10:57:01,645][WARN][o.e.d.z.UnicastZenPing] [OYN0im5] failed to resolve host [host1] java.net.UnknownHostException: host1: Name or service not known at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method) ~[?:1.8.0_171] at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) ~[?:1.8.0_171] at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) ~[?:1.8.0_171] at java.net.InetAddress.getAllByName0(InetAddress.java:1276) ~[?:1.8.0_171] at org.elasticsearch.transport.TcpTransport.parse(TcpTransport.java:918) ~[elasticsearch-6.2.4.jar:6.2.4] at org.elasticsearch.transport.TcpTransport.addressesFromString(TcpTransport.java:873) ~[elasticsearch-6.2.4.jar:6.2.4] at org.elasticsearch.transport.TransportService.addressesFromString(TransportService.java:703) ~[elasticsearch-6.2.4.jar:6.2.4] at org.elasticsearch.discovery.zen.UnicastZenPing.lambda$resolveHostsLists$0(UnicastZenPing.java:213) ~[elasticsearch-6.2.4.jar:6.2.4] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_171] at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:573) [elasticsearch-6.2.4.jar:6.2.4] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_171] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_171] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171] [2018-06-19T10:57:01,651][WARN][o.e.d.z.UnicastZenPing] [OYN0im5] failed to resolve host [host2] java.net.UnknownHostException: host2: Name or service not known at java.net.Inet4AddressImpl.lookupAllHostAddr(Native Method) ~[?:1.8.0_171] at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928) ~[?:1.8.0_171] at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323) ~[?:1.8.0_171] at java.net.InetAddress.getAllByName0(InetAddress.java:1276) ~[?:1.8.0_171] at java.net.InetAddress.getAllByName(InetAddress.java:1192) ~[?:1.8.0_171] at java.net.InetAddress.getAllByName(InetAddress.java:1126) ~[?:1.8.0_171] at org.elasticsearch.transport.TcpTransport.parse(TcpTransport.java:918) ~[elasticsearch-6.2.4.jar:6.2.4] at org.elasticsearch.transport.TcpTransport.addressesFromString(TcpTransport.java:873) ~[elasticsearch-6.2.4.jar:6.2.4] at org.elasticsearch.transport.TransportService.addressesFromString(TransportService.java:703) ~[elasticsearch-6.2.4.jar:6.2.4] at org.elasticsearch.discovery.zen.UnicastZenPing.lambda$resolveHostsLists$0(UnicastZenPing.java:213) ~[elasticsearch-6.2.4.jar:6.2.4] at java.util.concurrent.FutureTask.run(FutureTask.java:266) ~[?:1.8.0_171] at org.elasticsearch.common.util.concurrent.ThreadContext$ContextPreservingRunnable.run(ThreadContext.java:573) [elasticsearch-6.2.4.jar:6.2.4] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_171] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_171] at java.lang.Thread.run(Thread.java:748) [?:1.8.0_171] [2018-06-19T10:57:04,717][INFO][o.e.c.s.MasterService] [OYN0im5] zen-disco-elected-as-master ([0] nodes joined), reason: new_master {OYN0im5}{OYN0im58QKC3soPEZN5vcw}{2xtHhSxrTCS3TdD-nstLDA}{172.18.183.220}{172.18.183.220:9300} [2018-06-19T10:57:04,725][INFO][o.e.c.s.ClusterApplierService] [OYN0im5] new_master {OYN0im5}{OYN0im58QKC3soPEZN5vcw}{2xtHhSxrTCS3TdD-nstLDA}{172.18.183.220}{172.18.183.220:9300}, reason: apply cluster state (from master [master {OYN0im5}{OYN0im58QKC3soPEZN5vcw}{2xtHhSxrTCS3TdD-nstLDA}{172.18.183.220}{172.18.183.220:9300} committed version [1] source [zen-disco-elected-as-master ([0] nodes joined)]]) [2018-06-19T10:57:04,789][INFO][o.e.h.n.Netty4HttpServerTransport] [OYN0im5] publish_address {172.18.183.220:9200}, bound_addresses {172.18.183.220:9200} [2018-06-19T10:57:04,789][INFO][o.e.n.Node] [OYN0im5] started [2018-06-19T10:57:04,802][INFO][o.e.g.GatewayService] [OYN0im5] recovered [0] indices into cluster_state ``` I find the error '`[OYN0im5] failed to resolve host [host1]`' in the log. my `elasticsearch.yml` # ---------------------------------- Cluster ----------------------------------- ``` # cluster.name: inforsearch # # ------------------------------------ Node ------------------------------------ # # Use a descriptive name for the node: # node.name: node-1 # Add custom attributes to the node: # #node.attr.rack: r1 # ---------------------------------- Network ----------------------------------- # # Set the bind address to a specific IP (IPv4 or IPv6): # network.host: 172.18.183.220 # network.bind_host: 0.0.0.0 # # Set a custom port for HTTP: # http.port: 9200 ``` And I launch the Kibana and recieve: log [03:01:40.696] [info][status][plugin:kibana@6.2.4] Status changed from uninitialized to green - Ready log [03:01:40.775] [info][status][plugin:elasticsearch@6.2.4] Status changed from uninitialized to yellow - Waiting for Elasticsearch log [03:01:41.007] [info][status][plugin:timelion@6.2.4] Status changed from uninitialized to green - Ready log [03:01:41.017] [info][status][plugin:console@6.2.4] Status changed from uninitialized to green - Ready log [03:01:41.025] [info][status][plugin:metrics@6.2.4] Status changed from uninitialized to green - Ready log [03:01:41.057] [fatal] Port 5601 is already in use. Another instance of Kibana may be running! FATAL Port 5601 is already in use. Another instance of Kibana may be running! I use `ps -ef | grep node` to see the node [GZC@foxbert bin]$ ps -ef | grep node GZC 7216 7093 0 11:03 pts/1 00:00:00 grep --color=auto node GZC 8445 1 0 Jun13 ? 00:06:00 ./../node/bin/node --no-warnings ./../src/cli ``` # ps -ef | grep kibana root 8181 7403 0 11:21 pts/1 00:00:00 grep --color=auto kibana ``` my `kibana.yml` # Kibana is served by a back end server. This setting specifies the port to use. server.port: 5601 ``` # To allow connections from remote users, set this parameter to a non-loopback address. #server.host: "localhost" server.host: "172.18.183.220" # The Kibana server's name. This is used for display purposes. #server.name: "your-hostname" # The URL of the Elasticsearch instance to use for all your queries. elasticsearch.url: "http://120.79.223.63:9200" ``` What should I do? ---
**Author:** ![TimV](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/timv/32/13162_2.png) [@TimV](https://discuss.elastic.co/u/TimV)\ **Post date:** [June 19, 2018, 5:53am UTC](https://discuss.elastic.co/t/elasticsearch-start-failed-to-resolve-host-host1/136399/2 "2018-06-19T05:53:30Z")
I don't think you posted your full `elasticsearch.yml` file. I believe you have uncommented this line: ```auto discovery.zen.ping.unicast.hosts: ["host1", "host2"] ``` which tells Elasticsearch to go looking for other nodes for this cluster on machines `host1` and `host2`. If you want to configure an Elasticsearch cluster, then you will need to update that list to include the names of your actual servers. ---
**Author:** ![TimV](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/timv/32/13162_2.png) [@TimV](https://discuss.elastic.co/u/TimV)\ **Post date:** [July 17, 2018, 5:57am UTC](https://discuss.elastic.co/t/elasticsearch-start-failed-to-resolve-host-host1/136399/4 "2018-07-17T05:57:45Z")