Kihwal Lee created HADOOP-10315:
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Summary: Log the original exception when getGroups() fail in UGI.
Key: HADOOP-10315
URL: https://issues.apache.org/jira/browse/HADOOP-10315
Project: Hadoop Common
Issue Type: Bug
Affects Versions: 2.2.0, 0.23.10
Reporter: Kihwal Lee
In UserGroupInformation, getGroupNames() swallows the original exception. There
have been many occasions that more information on the original exception could
have helped.
{code}
public synchronized String[] getGroupNames() {
ensureInitialized();
try {
List<String> result = groups.getGroups(getShortUserName());
return result.toArray(new String[result.size()]);
} catch (IOException ie) {
LOG.warn("No groups available for user " + getShortUserName());
return new String[0];
}
}
{code}
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