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HADOOP-14361. Azure: NativeAzureFileSystem.getDelegationToken() call fails sometimes when invoked concurrently. Contributed by Santhosh G Nayak 

(cherry picked from commit eed731496f)
This commit is contained in:
Mingliang Liu 2017-05-10 15:05:11 -07:00
parent df3d7415c0
commit 586126956b
1 changed files with 1 additions and 1 deletions
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2
hadoop-tools/hadoop-azure/src/main/java/org/apache/hadoop/fs/azure/NativeAzureFileSystem.java
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@ -2978,7 +2978,7 @@ public class NativeAzureFileSystem extends FileSystem {
* @throws IOException thrown when getting the current user.
*/
@Override
public Token<?> getDelegationToken(final String renewer) throws IOException {
public synchronized Token<?> getDelegationToken(final String renewer) throws IOException {
if (kerberosSupportEnabled) {
try {
final UserGroupInformation ugi = UserGroupInformation.getCurrentUser();