[
https://issues.apache.org/jira/browse/HDFS-11764?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16108054#comment-16108054
]
runlinzhang commented on HDFS-11764:
------------------------------------
Thank you for your attention，the version is branch-2.7.2
When the default implementation JniBasedUnixGroupsMapping
GroupMappingServiceProvider,
And nodemanager does not configure the group for the user, which causes the
group to be null, which makes null judgment to avoid this problem
> NPE when the GroupMappingServiceProvider has no group
> ------------------------------------------------------
>
> Key: HDFS-11764
> URL: https://issues.apache.org/jira/browse/HDFS-11764
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: security
> Affects Versions: 2.7.2
> Reporter: runlinzhang
> Priority: Critical
> Fix For: 2.7.2
>
> Attachments: image.png
>
>
> The following code can throw NPE if GroupMappingServiceProvider.getGroups()
> returns null.
> public List<String> load(String user) throws Exception {
> List<String> groups = fetchGroupList(user);
> if (groups.isEmpty()) {
> if (isNegativeCacheEnabled()) {
> negativeCache.add(user);
> }
> // We throw here to prevent Cache from retaining an empty group
> throw noGroupsForUser(user);
> }
> return groups;
> }
> eg:image
--
This message was sent by Atlassian JIRA
(v6.4.14#64029)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
