qy-liuhuo commented on code in PR #11119:
URL: https://github.com/apache/inlong/pull/11119#discussion_r1774795549


##########
inlong-sdk/dataproxy-sdk/src/main/java/org/apache/inlong/sdk/dataproxy/ConfigConstants.java:
##########
@@ -74,4 +74,6 @@ public class ConfigConstants {
     public static String HTTP = "http://";;
     public static String HTTPS = "https://";;
 
+    public static int MAX_MESSAGE_LENGTH = 500 * 1024;

Review Comment:
   Now the transmission process of maxMsgSize configuration is as follows:
   1. `DataProxy` is configured first
   2. `maxMsgSize` is transmitted to the manager along with the `DataProxy` 
`heartbeat packet`(in the `extParams` field)
   3. The `manager` stores the `extParams` information (containing the 
`maxMsgSize` field) in the database
   4. `DataProxy` obtains `maxMsgSize` when calling the 
`/dataproxy/getIpList/{inlongGroupId}` interface to obtain proxy cluster 
information
   5. `DataProxy` uses `maxMsgSize` to determine whether the data exceeds the 
length limit



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