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https://issues.apache.org/jira/browse/HADOOP-19408?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Chris Nauroth updated HADOOP-19408:
-----------------------------------
Description:
HADOOP-15129 changed RPC connections so that if a client is initialized before
the server boots, it can re-resolve DNS to discover the updated address and
complete a successful connection. HADOOP-18365 addressed a remaining problem
with an old IP address remaining in the {{ConnectionId}} after the retry.
Unfortunately, this has also reintroduced the problem that HADOOP-15129 tried
to address, because it disallows hostname changes:
{{ if (!Objects.equals(this.address.getHostName(), address.getHostName()))
{}}
{{ throw new IllegalArgumentException("Hostname must match: " +
this.address + " vs "}}
{{ + address);}}
{{ }}}
was:
HADOOP-15129 changed RPC connections so that if a client is initialized before
the server boots, it can re-resolve DNS to discover the updated address and
complete a successful connection. HADOOP-18365 addressed a remaining problem
with an old IP address remaining in the {{ConnectionId}} after the retry.
Unfortunately, this has also reintroduced the problem that HADOOP-15129 tried
to address, because it disallows hostname changes:
{{
if (!Objects.equals(this.address.getHostName(), address.getHostName())) {
throw new IllegalArgumentException("Hostname must match: " +
this.address + " vs "
+ address);
}
}}
> RPC clients cannot tolerate hostname changes from DNS resolution.
> -----------------------------------------------------------------
>
> Key: HADOOP-19408
> URL: https://issues.apache.org/jira/browse/HADOOP-19408
> Project: Hadoop Common
> Issue Type: Bug
> Components: ipc
> Affects Versions: 3.4.0, 3.3.5
> Reporter: Chris Nauroth
> Priority: Major
>
> HADOOP-15129 changed RPC connections so that if a client is initialized
> before the server boots, it can re-resolve DNS to discover the updated
> address and complete a successful connection. HADOOP-18365 addressed a
> remaining problem with an old IP address remaining in the {{ConnectionId}}
> after the retry. Unfortunately, this has also reintroduced the problem that
> HADOOP-15129 tried to address, because it disallows hostname changes:
> {{ if (!Objects.equals(this.address.getHostName(),
> address.getHostName())) {}}
> {{ throw new IllegalArgumentException("Hostname must match: " +
> this.address + " vs "}}
> {{ + address);}}
> {{ }}}
>
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