pivotal-jbarrett commented on code in PR #7556:
URL: https://github.com/apache/geode/pull/7556#discussion_r844456474


##########
geode-core/src/main/java/org/apache/geode/internal/cache/tier/sockets/MessageDispatcher.java:
##########
@@ -548,6 +529,48 @@ protected void runDispatcher() {
     }
   }
 
+  private boolean 
handleAuthenticationExpiredException(AuthenticationExpiredException expired)
+      throws InterruptedException {
+    long reAuthenticateWaitTime =
+        getSystemProperty(RE_AUTHENTICATE_WAIT_TIME, 
DEFAULT_RE_AUTHENTICATE_WAIT_TIME);
+    synchronized (reAuthenticationLock) {
+      // turn on the "isWaitingForReAuthentication" flag before we send the 
re-auth message
+      // if we do it the other way around, the re-auth might be finished 
before we turn on the
+      // flag for the notification to happen.
+      waitForReAuthenticationStartTime = System.currentTimeMillis();
+      subjectUpdated = false;
+      // only send the message to clients who can handle the message
+      if 
(getProxy().getVersion().isNewerThanOrEqualTo(RE_AUTHENTICATION_START_VERSION)) 
{
+        EventID eventId = createEventId();
+        sendMessageDirectly(new ClientReAuthenticateMessage(eventId));
+      }
+
+      // We wait for all versions of clients to re-authenticate. For older 
clients we still
+      // wait, just in case client will perform some operations to
+      // trigger credential refresh on its own.
+      long waitFinishTime = waitForReAuthenticationStartTime + 
reAuthenticateWaitTime;
+      long remainingWaitTime = waitFinishTime - System.currentTimeMillis();
+      while (!subjectUpdated && remainingWaitTime > 0) {
+        reAuthenticationLock.wait(remainingWaitTime);
+        remainingWaitTime = waitFinishTime - System.currentTimeMillis();
+      }
+    }
+    // the above wait timed out
+    if (!subjectUpdated) {
+      long elapsedTime = System.currentTimeMillis() - 
waitForReAuthenticationStartTime;
+      // reset the timer here since we are no longer waiting for re-auth to 
happen anymore
+      waitForReAuthenticationStartTime = -1;

Review Comment:
   There is no use of this variable after this assignment.



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