GanfengTan commented on code in PR #6008:
URL: https://github.com/apache/inlong/pull/6008#discussion_r979246966


##########
inlong-agent/agent-plugins/src/main/java/org/apache/inlong/agent/plugin/sources/reader/file/FileReaderOperator.java:
##########
@@ -90,7 +93,9 @@ public Message read() {
                 AuditUtils.add(AuditUtils.AUDIT_ID_AGENT_READ_SUCCESS,
                         inlongGroupId, inlongStreamId, 
System.currentTimeMillis());
                 readerMetric.pluginReadCount.incrementAndGet();
-                return new 
DefaultMessage(message.getBytes(StandardCharsets.UTF_8));
+                Map<String, String> header = new HashMap<>();
+                header.put(PROXY_KEY_DATA, DigestUtils.md5Hex(inlongGroupId));
+                return new 
DefaultMessage(message.getBytes(StandardCharsets.UTF_8), header);

Review Comment:
   @pocozh 3qs your advice, I think inlongGroupId more better becuse the Group 
ID of the same task does not change. moreover added that users can configure 
Partition keys.



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