1 files changed, 72 insertions, 0 deletions
diff --git a/test/kafka/kafka-client-loadtest/tools/JavaAdminClientTest.java b/test/kafka/kafka-client-loadtest/tools/JavaAdminClientTest.java
new file mode 100644
index 000000000..177a86233
--- /dev/null
+++ b/test/kafka/kafka-client-loadtest/tools/JavaAdminClientTest.java
@@ -0,0 +1,72 @@
+import org.apache.kafka.clients.admin.AdminClient;
+import org.apache.kafka.clients.admin.AdminClientConfig;
+import org.apache.kafka.clients.admin.DescribeClusterResult;
+import org.apache.kafka.clients.admin.ListTopicsResult;
+
+import java.util.Properties;
+import java.util.concurrent.TimeUnit;
+
+public class JavaAdminClientTest {
+    public static void main(String[] args) {
+        // Set uncaught exception handler to catch AdminClient thread errors
+        Thread.setDefaultUncaughtExceptionHandler((t, e) -> {
+            System.err.println("UNCAUGHT EXCEPTION in thread " + t.getName() + ":");
+            e.printStackTrace();
+        });
+
+        String bootstrapServers = args.length > 0 ? args[0] : "localhost:9093";
+
+        System.out.println("Testing Kafka wire protocol with broker: " + bootstrapServers);
+
+        Properties props = new Properties();
+        props.put(AdminClientConfig.BOOTSTRAP_SERVERS_CONFIG, bootstrapServers);
+        props.put(AdminClientConfig.REQUEST_TIMEOUT_MS_CONFIG, 10000);
+        props.put(AdminClientConfig.DEFAULT_API_TIMEOUT_MS_CONFIG, 10000);
+        props.put(AdminClientConfig.CLIENT_ID_CONFIG, "java-admin-test");
+        props.put(AdminClientConfig.CONNECTIONS_MAX_IDLE_MS_CONFIG, 120000);
+        props.put(AdminClientConfig.SOCKET_CONNECTION_SETUP_TIMEOUT_MS_CONFIG, 10000);
+        props.put(AdminClientConfig.SOCKET_CONNECTION_SETUP_TIMEOUT_MAX_MS_CONFIG, 30000);
+        props.put(AdminClientConfig.SECURITY_PROTOCOL_CONFIG, "PLAINTEXT");
+        props.put(AdminClientConfig.RECONNECT_BACKOFF_MS_CONFIG, 50);
+        props.put(AdminClientConfig.RECONNECT_BACKOFF_MAX_MS_CONFIG, 1000);
+
+        System.out.println("Creating AdminClient with config:");
+        props.forEach((k, v) -> System.out.println("  " + k + " = " + v));
+
+        try (AdminClient adminClient = AdminClient.create(props)) {
+            System.out.println("AdminClient created successfully");
+            Thread.sleep(2000); // Give it time to initialize
+
+            // Test 1: Describe Cluster (uses Metadata API internally)
+            System.out.println("\n=== Test 1: Describe Cluster ===");
+            try {
+                DescribeClusterResult clusterResult = adminClient.describeCluster();
+                String clusterId = clusterResult.clusterId().get(10, TimeUnit.SECONDS);
+                int nodeCount = clusterResult.nodes().get(10, TimeUnit.SECONDS).size();
+                System.out.println("Cluster ID: " + clusterId);
+                System.out.println("Nodes: " + nodeCount);
+            } catch (Exception e) {
+                System.err.println("Describe Cluster failed: " + e.getMessage());
+                e.printStackTrace();
+            }
+
+            // Test 2: List Topics
+            System.out.println("\n=== Test 2: List Topics ===");
+            try {
+                ListTopicsResult topicsResult = adminClient.listTopics();
+                int topicCount = topicsResult.names().get(10, TimeUnit.SECONDS).size();
+                System.out.println("Topics: " + topicCount);
+            } catch (Exception e) {
+                System.err.println("List Topics failed: " + e.getMessage());
+                e.printStackTrace();
+            }
+
+            System.out.println("\nAll tests completed!");
+
+        } catch (Exception e) {
+            System.err.println("AdminClient creation failed: " + e.getMessage());
+            e.printStackTrace();
+            System.exit(1);
+        }
+    }
+}