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

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(cherry picked from commit 47c41e7ac7e6b905a58550f8899f629c1cf8b138)
This commit is contained in:
Yongjun Zhang 2016-05-06 21:50:09 -07:00
parent 1d563f4d7e
commit 5172d0e7b1
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 boolean cancel() {
*/
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(""));
}