I am not getting results from ksql StreamQuery integrated with java. when I am printing log for client is showing not completed - apache-kafka

Question

I am using confluent kafka version 6.o
downloaded from https://www.confluent.io/download/
I am referring
https://docs.ksqldb.io/en/latest/developer-guide/ksqldb-clients/java-client/ acritical .
https://www.youtube.com/watch?v=85udigshlNI
with java producer code I am able to send value to ksql. But not able to retrieve this value.
when I am printing log for streamQuery result, I am getting Not Completed message.
used Maven dependency as:
<dependencies>
<dependency>
<groupId>io.confluent.ksql</groupId>
<artifactId>ksqldb-api-client</artifactId>
<version>${ksqldb.version}</version>
</dependency>
</dependencies>
java code :
public class ExampleApp {
public static String KSQLDB_SERVER_HOST = "localhost";
public static int KSQLDB_SERVER_HOST_PORT = 8088;
public static void main(String[] args) {
ClientOptions options = ClientOptions.create()
.setHost(KSQLDB_SERVER_HOST)
.setPort(KSQLDB_SERVER_HOST_PORT);
Client client = Client.create(options);
// Send requests with the client by following the other examples
// Terminate any open connections and close the client
client.close();
}
}public class ExampleApp {
public static String KSQLDB_SERVER_HOST = "localhost";
public static int KSQLDB_SERVER_HOST_PORT = 8088;
public static void main(String[] args) {
ClientOptions options = ClientOptions.create()
.setHost(KSQLDB_SERVER_HOST)
.setPort(KSQLDB_SERVER_HOST_PORT);
Client client = Client.create(options);
StreamedQueryResult streamedQueryResult = client.streamQuery("SELECT * FROM MY_STREAM EMIT CHANGES;").get();
for (int i = 0; i < 10; i++) {
// Block until a new row is available
Row row = streamedQueryResult.poll();
if (row != null) {
System.out.println("Received a row!");
System.out.println("Row: " + row.values());
} else {
System.out.println("Query has ended.");
}
}
client.close();
}
}
output :
get() is waiting for long time even after adding values into topic waiting and finally gives timeout exception.