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https://issues.apache.org/jira/browse/YARN-7198?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16202732#comment-16202732
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Allen Wittenauer commented on YARN-7198:
----------------------------------------
I'm still playing with the last patch, but I'm very perplexed.
If I set
{code}
export YARN_REGISTRYDNS_SECURE_USER=yarn
{code}
in hadoop-env.sh/yarn-env.sh and then run:
{code}
yarn --daemon start registrydns
{code}
the process breaks with
{code}
java.lang.ClassNotFoundException:
org.apache.hadoop.registry.server.dns.PrivilegedRegistryDNSStarter
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at
org.apache.commons.daemon.support.DaemonLoader.load(DaemonLoader.java:151)
Cannot load daemon
Service exit with a return value of 3
{code}
That's indicative of either the classname being wrong or the jar files being or
the class not being in the jar files or whatever. A quick pass through the
jars I'm using show it isn't in there. I'll double check my build to make sure
it's the correct one. It's likely a local build problem, so whatever.
But if I don't set that (and therefore, don't get the jsvc behavior)
It comes up as yarn on port 54... which shouldn't work since 54 is a reserved
port and the yarn user shouldn't have access to that port. Very very curious.
> Add jsvc support for RegistryDNS
> --------------------------------
>
> Key: YARN-7198
> URL: https://issues.apache.org/jira/browse/YARN-7198
> Project: Hadoop YARN
> Issue Type: Sub-task
> Components: yarn-native-services
> Reporter: Billie Rinaldi
> Assignee: Billie Rinaldi
> Priority: Critical
> Attachments: YARN-7198-yarn-native-services.01.patch,
> YARN-7198-yarn-native-services.02.patch,
> YARN-7198-yarn-native-services.03.patch,
> YARN-7198-yarn-native-services.04.patch,
> YARN-7198-yarn-native-services.05.patch,
> YARN-7198-yarn-native-services.06.patch
>
>
> RegistryDNS should have jsvc support and be managed through the shell
> scripts, rather than being started manually. See original comments on
> YARN-7191.
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