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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-4418) ClusterClient/ConnectionUtils#findConnectingAddress fails immediately if InetAddress.getLocalHost throws exception
Date Fri, 26 Aug 2016 16:52:20 GMT

    [ https://issues.apache.org/jira/browse/FLINK-4418?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15439379#comment-15439379
] 

ASF GitHub Bot commented on FLINK-4418:
---------------------------------------

Github user asfgit closed the pull request at:

    https://github.com/apache/flink/pull/2383


> ClusterClient/ConnectionUtils#findConnectingAddress fails immediately if InetAddress.getLocalHost
throws exception
> ------------------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-4418
>                 URL: https://issues.apache.org/jira/browse/FLINK-4418
>             Project: Flink
>          Issue Type: Bug
>          Components: Client
>    Affects Versions: 1.1.0
>            Reporter: Shannon Carey
>            Assignee: Shannon Carey
>
> When attempting to connect to a cluster with a ClusterClient, if the machine's hostname
is not resolvable to an IP, an exception is thrown preventing success.
> This is the case if, for example, the hostname is not present & mapped to a local
IP in /etc/hosts.
> The exception is below. I suggest that findAddressUsingStrategy() should catch java.net.UnknownHostException
thrown by InetAddress.getLocalHost() and return null, allowing alternative strategies to be
attempted by findConnectingAddress(). I will open a PR to this effect. Ideally this could
be included in both 1.2 and 1.1.2.
> In the stack trace below, "ip-10-2-64-47" is the internal host name of an AWS EC2 instance.
> {code}
> 21:11:35 org.apache.flink.client.program.ProgramInvocationException: Failed to retrieve
the JobManager gateway.
> 21:11:35 	at org.apache.flink.client.program.ClusterClient.runDetached(ClusterClient.java:430)
> 21:11:35 	at org.apache.flink.client.program.StandaloneClusterClient.submitJob(StandaloneClusterClient.java:90)
> 21:11:35 	at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:389)
> 21:11:35 	at org.apache.flink.client.program.DetachedEnvironment.finalizeExecute(DetachedEnvironment.java:75)
> 21:11:35 	at org.apache.flink.client.program.ClusterClient.run(ClusterClient.java:334)
> 21:11:35 	at com.expedia.www.flink.job.scheduler.FlinkJobSubmitter.get(FlinkJobSubmitter.java:81)
> 21:11:35 	at com.expedia.www.flink.job.scheduler.streaming.StreamingJobManager.run(StreamingJobManager.java:105)
> 21:11:35 	at com.expedia.www.flink.job.scheduler.JobScheduler.runStreamingApp(JobScheduler.java:69)
> 21:11:35 	at com.expedia.www.flink.job.scheduler.JobScheduler.main(JobScheduler.java:34)
> 21:11:35 Caused by: java.lang.RuntimeException: Failed to resolve JobManager address
at /10.2.89.80:43126
> 21:11:35 	at org.apache.flink.client.program.ClusterClient$LazyActorSystemLoader.get(ClusterClient.java:189)
> 21:11:35 	at org.apache.flink.client.program.ClusterClient.getJobManagerGateway(ClusterClient.java:649)
> 21:11:35 	at org.apache.flink.client.program.ClusterClient.runDetached(ClusterClient.java:428)
> 21:11:35 	... 8 more
> 21:11:35 Caused by: java.net.UnknownHostException: ip-10-2-64-47: ip-10-2-64-47: unknown
error
> 21:11:35 	at java.net.InetAddress.getLocalHost(InetAddress.java:1505)
> 21:11:35 	at org.apache.flink.runtime.net.ConnectionUtils.findAddressUsingStrategy(ConnectionUtils.java:232)
> 21:11:35 	at org.apache.flink.runtime.net.ConnectionUtils.findConnectingAddress(ConnectionUtils.java:123)
> 21:11:35 	at org.apache.flink.client.program.ClusterClient$LazyActorSystemLoader.get(ClusterClient.java:187)
> 21:11:35 	... 10 more
> 21:11:35 Caused by: java.net.UnknownHostException: ip-10-2-64-47: unknown error
> 21:11:35 	at java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
> 21:11:35 	at java.net.InetAddress$2.lookupAllHostAddr(InetAddress.java:928)
> 21:11:35 	at java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1323)
> 21:11:35 	at java.net.InetAddress.getLocalHost(InetAddress.java:1500)
> 21:11:35 	... 13 more
> {code}



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