[fix][Transaction] Fix transaction admin redirect get 500 due to getCause

pulsar-broker/src/main/java/org/apache/pulsar/broker/admin/impl/TransactionsBase.java

@@ -501,7 +501,7 @@ protected void internalGetCoordinatorInternalStats(AsyncResponse asyncResponse,
                         "This Broker is not configured with transactionCoordinatorEnabled=true."));
             }
         } catch (Exception e) {
-            asyncResponse.resume(new RestException(e.getCause()));
+            resumeAsyncResponseExceptionally(asyncResponse, e);
         }
     }
 

pulsar-broker/src/test/java/org/apache/pulsar/broker/admin/v3/AdminApiTransactionMultiBrokerTest.java

@@ -0,0 +1,65 @@
+/**
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ */
+package org.apache.pulsar.broker.admin.v3;
+
+import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import lombok.extern.slf4j.Slf4j;
+import org.apache.pulsar.broker.transaction.TransactionTestBase;
+import org.apache.pulsar.client.api.PulsarClient;
+import org.apache.pulsar.common.naming.TopicName;
+import org.testng.annotations.AfterMethod;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+@Slf4j
+public class AdminApiTransactionMultiBrokerTest extends TransactionTestBase {
+
+    private static final int NUM_BROKERS = 16;
+    private static final int NUM_PARTITIONS = 16;
+
+    @BeforeMethod
+    protected void setup() throws Exception {
+        setUpBase(NUM_BROKERS, NUM_PARTITIONS, NAMESPACE1 + "/test", 0);
+    }
+
+    @AfterMethod(alwaysRun = true)
+    protected void cleanup() throws Exception {
+        super.internalCleanup();
+    }
+
+    @Test
+    public void testRedirectOfGetCoordinatorInternalStats() throws Exception {
+        Map<String, String> map = admin.lookups()
+                .lookupPartitionedTopic(TopicName.TRANSACTION_COORDINATOR_ASSIGN.toString());
+        while (map.values().contains(getPulsarServiceList().get(0).getBrokerServiceUrl())) {
+            admin.topics().deletePartitionedTopic(TopicName.TRANSACTION_COORDINATOR_ASSIGN.toString());
+            admin.topics().createPartitionedTopic(TopicName.TRANSACTION_COORDINATOR_ASSIGN.toString(), NUM_PARTITIONS);
+        }
+        //init tc stores
+        pulsarClient = PulsarClient.builder()
+                .serviceUrl(getPulsarServiceList().get(0).getBrokerServiceUrl())
+                .statsInterval(0, TimeUnit.SECONDS)
+                .enableTransaction(true)
+                .build();
+        for (int i = 0; i < NUM_PARTITIONS; i++) {
+            admin.transactions().getCoordinatorInternalStats(i, false);
+        }
+    }
+}