pzampino commented on a change in pull request #337:
URL: https://github.com/apache/knox/pull/337#discussion_r433853293



##########
File path: 
gateway-server/src/main/java/org/apache/knox/gateway/services/token/impl/DefaultTokenStateService.java
##########
@@ -237,12 +249,37 @@ protected boolean isUnknown(final String token) {
 
   protected void updateExpiration(final String tokenId, long expiration) {
     synchronized (tokenExpirations) {
-      tokenExpirations.replace(tokenId, expiration);
+      if (tokenExpirations.containsKey(tokenId)) {
+        tokenExpirations.replace(tokenId, expiration);
+      } else {
+        tokenExpirations.put(tokenId, expiration);
+      }

Review comment:
       Yes, I had meant to return to this after verifying that the replace 
invocation that was already there is not needed.




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