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jackietien pushed a commit to branch mqtt_bug
in repository https://gitbox.apache.org/repos/asf/iotdb.git

commit 19579a3878b323ee60ba22cde11c6d61e62ea0cb
Author: JackieTien97 <[email protected]>
AuthorDate: Wed Jun 11 19:15:32 2025 +0800

    Remove ThreadLocal for Mqtt Client
---
 .../java/org/apache/iotdb/db/protocol/session/SessionManager.java   | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/protocol/session/SessionManager.java
 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/protocol/session/SessionManager.java
index 4aa6c9db8a9..d7c5cb6f8be 100644
--- 
a/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/protocol/session/SessionManager.java
+++ 
b/iotdb-core/datanode/src/main/java/org/apache/iotdb/db/protocol/session/SessionManager.java
@@ -360,11 +360,9 @@ public class SessionManager implements SessionManagerMBean 
{
   /**
    * this method can be only used in mqtt model. Do not use this method in 
client-thread model based
    * service.
-   *
-   * @return false if the session has been initialized.
    */
-  public boolean registerSessionForMqtt(IClientSession session) {
-    return sessions.put(session, placeHolder) == null;
+  public void registerSessionForMqtt(IClientSession session) {
+    sessions.put(session, placeHolder);
   }
 
   /** must be called after registerSession()) will mark the session login. */

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