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YARN-5048. DelegationTokenRenewer#skipTokenRenewal may throw NPE (Jian He via Yongjun Zhang) 

(cherry picked from commit 47c41e7ac7)
This commit is contained in:
Yongjun Zhang 2016-05-06 21:50:09 -07:00
parent 8653bcbe67
commit 5ae5b869aa
1 changed files with 7 additions and 2 deletions
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9
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/security/DelegationTokenRenewer.java
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@ -539,9 +539,14 @@ public class DelegationTokenRenewer extends AbstractService {
*/
private boolean skipTokenRenewal(Token<?> token)
throws IOException {
@SuppressWarnings("unchecked")
Text renewer = ((Token<AbstractDelegationTokenIdentifier>)token).
decodeIdentifier().getRenewer();
AbstractDelegationTokenIdentifier identifier =
((Token<AbstractDelegationTokenIdentifier>) token).decodeIdentifier();
if (identifier == null) {
return false;
}
Text renewer = identifier.getRenewer();
return (renewer != null && renewer.toString().equals(""));
}