Client#getRemotePrincipal NPEs when given invalid dfs.*.name
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Key: HADOOP-7503
URL: https://issues.apache.org/jira/browse/HADOOP-7503
Project: Hadoop Common
Issue Type: Bug
Components: ipc, security
Affects Versions: 0.20.203.0, 0.23.0
Reporter: Eli Collins
The following code in Client#getRemotePrincipal NPEs if security is enabled and
dfs.https.address, dfs.secondary.http.address, dfs.secondary.https.address, or
fs.default.name, has an invalid value (eg hdfs://foo.bar.com.foo.bar.com:1000).
We should check address.checkAddress() for null (or check this earlier) and
give a more helpful error message.
{noformat}
return SecurityUtil.getServerPrincipal(conf.get(serverKey), address
.getAddress().getCanonicalHostName());
{noformat}
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