315157973 commented on a change in pull request #10028:
URL: https://github.com/apache/pulsar/pull/10028#discussion_r602131194



##########
File path: 
pulsar-client/src/main/java/org/apache/pulsar/client/impl/PulsarClientImpl.java
##########
@@ -689,11 +782,16 @@ public boolean isClosed() {
 
     @Override
     public synchronized void updateServiceUrl(String serviceUrl) throws 
PulsarClientException {
-        log.info("Updating service URL to {}", serviceUrl);
+        try {
+            log.info("Updating service URL to {}", serviceUrl);
 
-        conf.setServiceUrl(serviceUrl);
-        lookup.updateServiceUrl(serviceUrl);
-        cnxPool.closeAllConnections();
+            conf.setServiceUrl(serviceUrl);
+            lookup.updateServiceUrl(serviceUrl);
+            cnxPool.closeAllConnections();
+        } catch (Throwable t) {
+            log.warn("Failed to update service URL.");
+            close();

Review comment:
       yes




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