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Ted Yu commented on HADOOP-10315: --------------------------------- By default, Negative Cache is enabled. >From API point of view, it is unclear whether the exception (if any) comes >from negativeCache containing the user or, from retrieval from cache. > 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: 0.23.10, 2.2.0 > Reporter: Kihwal Lee > Assignee: Ted Yu > Attachments: HADOOP-10315.v1.patch > > > 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} -- This message was sent by Atlassian JIRA (v6.3.4#6332)