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From "Aljoscha Krettek (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (FLINK-9148) when deploying flink on kubernetes, the taskmanager report "java.net.UnknownHostException: flink-jobmanager: Temporary failure in name resolution"
Date Wed, 18 Apr 2018 11:27:00 GMT

     [ https://issues.apache.org/jira/browse/FLINK-9148?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Aljoscha Krettek updated FLINK-9148:
------------------------------------
    Fix Version/s: 1.5.0

> when deploying flink on kubernetes, the taskmanager report "java.net.UnknownHostException:
flink-jobmanager: Temporary failure in name resolution"
> --------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-9148
>                 URL: https://issues.apache.org/jira/browse/FLINK-9148
>             Project: Flink
>          Issue Type: Bug
>          Components: Docker
>    Affects Versions: 1.4.2
>         Environment: kubernetes 1.9
> docker 1.4
> see :https://ci.apache.org/projects/flink/flink-docs-release-1.4/ops/deployment/kubernetes.html
>            Reporter: You Chu
>            Priority: Blocker
>             Fix For: 1.5.0
>
>
> refer to https://ci.apache.org/projects/flink/flink-docs-release-1.4/ops/deployment/kubernetes.html:
> I deploy flink1.4 on kubernetes 1.9, the jobmanager container is ok, but the taskmanager
contains failed with error:
> java.net.UnknownHostException: flink-jobmanager: Temporary failure in name resolution
>  at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
>  at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
>  at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
>  at java.net.InetAddress.getAllByName0(InetAddress.java:1276)
>  at java.net.InetAddress.getAllByName(InetAddress.java:1192)
>  at java.net.InetAddress.getAllByName(InetAddress.java:1126)
>  at java.net.InetAddress.getByName(InetAddress.java:1076)
>  at org.apache.flink.runtime.rpc.akka.AkkaRpcServiceUtils.getRpcUrl(AkkaRpcServiceUtils.java:172)
>  at org.apache.flink.runtime.rpc.akka.AkkaRpcServiceUtils.getRpcUrl(AkkaRpcServiceUtils.java:137)
>  at org.apache.flink.runtime.highavailability.HighAvailabilityServicesUtils.createHighAvailabilityServices(HighAvailabilityServicesUtils.java:79)
>  at org.apache.flink.runtime.taskmanager.TaskManager$.selectNetworkInterfaceAndRunTaskManager(TaskManager.scala:1681)
>  at org.apache.flink.runtime.taskmanager.TaskManager$$anon$2.call(TaskManager.scala:1592)
>  at org.apache.flink.runtime.taskmanager.TaskManager$$anon$2.call(TaskManager.scala:1590)
>  at java.security.AccessController.doPrivileged(Native Method)
>  
> I know that the the 
> jobmanager-deployment.yaml
> taskmanager-deployment.yaml
> I know in flink docker image, it uses environment  {{JOB_MANAGER_RPC_ADDRESS=flink-jobmanager
to resolve jobmanager address. however in flink task container, it can't resolve the hostname flink-jobmanager.
> Can anyone help me to fix it? Should I need to setup a DNS to resolve?}}



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