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Merged r1208926 from trunk for HADOOP-7854. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/branch-0.23@1208929 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Jitendra Nath Pandey 2011-12-01 01:21:23 +00:00
parent 3610bc8c4c
commit ca3fb12d09
2 changed files with 6 additions and 3 deletions
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6
hadoop-common-project/hadoop-common/CHANGES.txt
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@ -51,8 +51,10 @@ Release 0.23.1 - Unreleased
HADOOP-7864. Building mvn site with Maven < 3.0.2 causes OOM errors. HADOOP-7864. Building mvn site with Maven < 3.0.2 causes OOM errors.
(Andrew Bayer via eli) (Andrew Bayer via eli)
HADOOP-7853. multiple javax security configurations cause conflicts. HADOOP-7853. multiple javax security configurations cause conflicts.
(daryn via tucu) (daryn via tucu)
HADOOP-7854. UGI getCurrentUser is not synchronized. (Daryn Sharp via jitendra)
Release 0.23.0 - 2011-11-01 Release 0.23.0 - 2011-11-01

3
hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/security/UserGroupInformation.java
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@ -449,7 +449,8 @@ public class UserGroupInformation {
* @return the current user * @return the current user
* @throws IOException if login fails * @throws IOException if login fails
*/ */
public static UserGroupInformation getCurrentUser() throws IOException { public synchronized
static UserGroupInformation getCurrentUser() throws IOException {
AccessControlContext context = AccessController.getContext(); AccessControlContext context = AccessController.getContext();
Subject subject = Subject.getSubject(context); Subject subject = Subject.getSubject(context);
if (subject == null || subject.getPrincipals(User.class).isEmpty()) { if (subject == null || subject.getPrincipals(User.class).isEmpty()) {