iwasakims commented on issue #1961: HADOOP-16972. Ignore 
AuthenticationFilterInitializer for KMSWebServer.
URL: https://github.com/apache/hadoop/pull/1961#issuecomment-614470861
 
 
   The added `testFilterInitializer` fails without the fix in `KMSWebServer`. 
The cause of "GSSException: Failure unspecified at GSS-API level (Mechanism 
level: Request is a replay (34))" is the same of 
[HDFS-14845](https://issues.apache.org/jira/browse/HDFS-14845).
   ```
   [ERROR] 
testFilterInitializer(org.apache.hadoop.crypto.key.kms.server.TestKMS)  Time 
elapsed: 0.282 s  <<< ERROR!
   java.io.IOException: 
org.apache.hadoop.security.authentication.client.AuthenticationException: Error 
while authenticating with endpoint: http://localhost:40145/kms/v1/keys/names
        at 
org.apache.hadoop.crypto.key.kms.KMSClientProvider.createConnection(KMSClientProvider.java:525)
        at 
org.apache.hadoop.crypto.key.kms.KMSClientProvider.getKeys(KMSClientProvider.java:638)
        ... snip
   Caused by: 
org.apache.hadoop.security.authentication.client.AuthenticationException: 
Authentication failed, URL: 
http://localhost:40145/kms/v1/keys/names?user.name=client, status: 403, 
message: GSSException: Failure unspecified at GSS-API level (Mechanism level: 
Request is a replay (34))
        at 
org.apache.hadoop.security.authentication.client.AuthenticatedURL.extractToken(AuthenticatedURL.java:404)
        at 
org.apache.hadoop.security.authentication.client.PseudoAuthenticator.authenticate(PseudoAuthenticator.java:74)
        at 
org.apache.hadoop.security.token.delegation.web.DelegationTokenAuthenticator.authenticate(DelegationTokenAuthenticator.java:143)
        at 
org.apache.hadoop.security.authentication.client.KerberosAuthenticator.authenticate(KerberosAuthenticator.java:213)
        ... 41 more
   ```
   

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