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https://issues.apache.org/jira/browse/YARN-10045?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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chaoli updated YARN-10045:
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Description:
As we all know, hostResolver in hadoop is implemented by
*SecurityUitl.getByName*.
there are two implements of hostResolver. One is *QualifiedHostResolver*, and
the other is *StandardHostResolver*. Both of them doesn't supply circuit
breaker when dns server is not available.
My question is how can i failover quickly when dns server is not available?
since dns server may not always work good. Or , can I just use ip in
nodemanager when in registering step to solve dns problem? what are the
shortcomings if I use ip instead of host ?
was:
As we all know, hostResolver in hadoop is implemented by
SecurityUitl.getByName.
there are two implements of hostResolver. One is QualifiedHostResolver, and the
other is StandardHostResolver. Both of them doesn't supply circuit breaker when
dns server is not available.
My question is how can i failover quickly when dns server is not available?
since dns server may not always work good. Or , can I just use ip in
nodemanager when in registering step to solve dns problem? what are the
shortcomings if I use ip instead of host ?
> hostResolver should take DNS server‘s availability into account
> ---------------------------------------------------------------
>
> Key: YARN-10045
> URL: https://issues.apache.org/jira/browse/YARN-10045
> Project: Hadoop YARN
> Issue Type: Improvement
> Reporter: chaoli
> Priority: Major
>
> As we all know, hostResolver in hadoop is implemented by
> *SecurityUitl.getByName*.
> there are two implements of hostResolver. One is *QualifiedHostResolver*, and
> the other is *StandardHostResolver*. Both of them doesn't supply circuit
> breaker when dns server is not available.
> My question is how can i failover quickly when dns server is not available?
> since dns server may not always work good. Or , can I just use ip in
> nodemanager when in registering step to solve dns problem? what are the
> shortcomings if I use ip instead of host ?
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