Chris Nauroth created HADOOP-19408:
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Summary: 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: 3.3.5, 3.4.0
Reporter: Chris Nauroth
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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