massakam commented on a change in pull request #10381:
URL: https://github.com/apache/pulsar/pull/10381#discussion_r620898217



##########
File path: 
pulsar-client-auth-athenz/src/main/java/org/apache/pulsar/client/impl/auth/AuthenticationAthenz.java
##########
@@ -81,23 +82,24 @@ public String getAuthMethodName() {
     }
 
     @Override
-    synchronized public AuthenticationDataProvider getAuthData() throws 
PulsarClientException {
-        if (cachedRoleTokenIsValid()) {
-            return new AuthenticationDataAthenz(roleToken, 
isNotBlank(roleHeader) ? roleHeader : ZTSClient.getHeader());
-        }
-        try {
-            // the following would set up the API call that requests tokens 
from the server
-            // that can only be used if they are 10 minutes from expiration 
and last twenty
-            // four hours
-            RoleToken token;
-            synchronized (providerDomainLock) {
-                token = getZtsClient().getRoleToken(providerDomain, null, 
minValidity, maxValidity, false);
+    public AuthenticationDataProvider getAuthData() throws 
PulsarClientException {
+        synchronized (cachedRoleTokenLock) {

Review comment:
       @merlimat That's right. Introduced read-write lock.




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