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https://issues.apache.org/jira/browse/SLIDER-1088?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15154964#comment-15154964
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Steve Loughran commented on SLIDER-1088:
----------------------------------------
Switching to {{appMasterHostname =
rpcServiceAddress.getAddress().getCanonicalHostName();}} is going to fix this
and any web URLs.
Before doing that, writing a test to fail if the hostname of the RPC endpoint
in the AppReport doesn't contain a null. This test does not fail locally:
{code}
2016-02-19 21:56:35,395 [Thread-1] INFO test.YarnMiniClusterTestBase
(?:call(?)) - App teststandaloneagentam/org-apache-slider#
application_1455918984693_0001 user stevel is in state RUNNING RPC:
stevel-2.local:60000 URLhttp://stevel-2.local:60001
{code}
this means that the JVM may or may not be returning an FQDN with the current
call. Switching to {{getCanonicalHostName()}} should guarantee that it is
always set
> Slider client getting UnknownHost exception trying to RPC to AM in different
> subdomain
> --------------------------------------------------------------------------------------
>
> Key: SLIDER-1088
> URL: https://issues.apache.org/jira/browse/SLIDER-1088
> Project: Slider
> Issue Type: Bug
> Components: appmaster, client
> Affects Versions: Slider 0.90.2
> Reporter: Steve Loughran
> Assignee: Steve Loughran
>
> When you try to issue a call like "slider status" from a domain other than
> that in which the cluster is, you get to see a stack trace
> {code}
> ERROR main.ServiceLauncher - Exception: Invalid host name: local host is:
> (unknown); destination host is: "wn1-slider":1024;
> java.net.UnknownHostException; For more details see:
> http://wiki.apache.org/hadoop/UnknownHost
> java.net.UnknownHostException: Invalid host name: local host is: (unknown);
> destination host is: "wn1-slider":1024; java.net.UnknownHostException; For
> more details see: http://wiki.apache.org/hadoop/UnknownHost
> at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
> at
> sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
> at
> sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
> at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
> ...
>
> org.apache.slider.server.appmaster.rpc.SliderClusterProtocolProxy.getJSONClusterStatus(SliderClusterProtocolProxy.java:129)
> at
> org.apache.slider.client.ipc.SliderClusterOperations.getClusterDescription(SliderClusterOperations.java:143)
> at
> org.apache.slider.client.SliderClient.getClusterDescription(SliderClient.java:3342)
> {code}
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