cmick commented on a change in pull request #16023:
URL: https://github.com/apache/flink/pull/16023#discussion_r642351529



##########
File path: 
flink-connectors/flink-connector-rabbitmq/src/main/java/org/apache/flink/streaming/connectors/rabbitmq/common/RMQConnectionConfig.java
##########
@@ -29,21 +29,24 @@
 import java.security.KeyManagementException;
 import java.security.NoSuchAlgorithmException;
 import java.util.Optional;
+import java.util.concurrent.TimeUnit;
 
 /**
  * Connection Configuration for RMQ. If {@link Builder#setUri(String)} has 
been set then {@link
  * RMQConnectionConfig#RMQConnectionConfig(String, Integer, Boolean, Boolean, 
Integer, Integer,
- * Integer, Integer, Integer)} will be used for initialize the RMQ connection 
or {@link
+ * Integer, Integer, Integer, Integer)} will be used for initialize the RMQ 
connection or {@link
  * RMQConnectionConfig#RMQConnectionConfig(String, Integer, String, String, 
String, Integer,
- * Boolean, Boolean, Integer, Integer, Integer, Integer, Integer)} will be 
used for initialize the
- * RMQ connection
+ * Boolean, Boolean, Integer, Integer, Integer, Integer, Integer, Integer)} 
will be used for
+ * initialize the RMQ connection
  */
 public class RMQConnectionConfig implements Serializable {
 
     private static final long serialVersionUID = 1L;
 
     private static final Logger LOG = 
LoggerFactory.getLogger(RMQConnectionConfig.class);
 
+    private static final int DEFAULT_DELIVERY_TIMEOUT = 30000;

Review comment:
       We decided in the discussion under the related ticket 
(https://issues.apache.org/jira/browse/FLINK-22698) to set a sensible default 
that will resolve the potential problem that a user may encounter while 
stopping the job (the other option is to just leave the current problematic 
behavior by setting in to 0).
   There's nothing special about 30s, but I would say it should be lower than 
60s as this is the default timeout for the CLI client stop command.




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