Issues

• Mqttv5 client should throw MqttException if pubAck/pubRec is received with reason code >= 0x80

  eclipse-paho/paho.mqtt.java#1105 · Filter by author harshitsharma635 opened on Jun 25, 2026

• [BUG] Persisted alias-only QoS 1/2 PUBLISH causes RC 148 (reconnect) and RC 130 (restart) infinite disconnect loop — gap in #527 fix

  eclipse-paho/paho.mqtt.java#1104 · Filter by author vpeddada-tibco opened on Jun 18, 2026
  1

• Mqttv5 client throws MqttException when clean session is using Server assigned clientID with default file persistence

  eclipse-paho/paho.mqtt.java#1102 · Filter by author harshitsharma635 opened on May 26, 2026

• CVE-2025-10543

  eclipse-paho/paho.mqtt.java#1101 · Filter by author cyberrranger opened on Mar 26, 2026
  1

• Eclipse Paho MQTT v5 Client subscribe() Method Infinite Recursion Causes StackOverflowError

  eclipse-paho/paho.mqtt.java#1100 · Filter by author sushijia123 opened on Jan 28, 2026
  1

• Multiple CONNECT frames are sent during a reconnection.

  eclipse-paho/paho.mqtt.java#1099 · Filter by author freyssin opened on Jan 16, 2026
  1

• Connections pending during the reconnection process.

  eclipse-paho/paho.mqtt.java#1098 · Filter by author freyssin opened on Jan 16, 2026

• Does the community have any plans to implement a compatible MQTT over QUIC protocol for the Paho client?

  eclipse-paho/paho.mqtt.java#1097 · Filter by author Kris20030907 opened on Jan 16, 2026

• Race condition between disconnect() and close() leaves zombie client/threads behind

  eclipse-paho/paho.mqtt.java#1093 · Filter by author MortronMeymo opened on Nov 4, 2025
  1

• MqttException v3 does not have error code in its message

  eclipse-paho/paho.mqtt.java#1090 · Filter by author scrat98 opened on Sep 25, 2025

• The connect time for mqtt in version 1.2.5 has increased by approximately 300ms compared to version 1.2.0

  eclipse-paho/paho.mqtt.java#1089 · Filter by author note123456789a opened on Sep 11, 2025

• Unexpected behavior while using single level wildcard + for the subscriber application.

  eclipse-paho/paho.mqtt.java#1088 · Filter by author vpeddada-tibco opened on Sep 3, 2025

• Unexpected behavior while using multi level wildcard # for the subscriber application.

  eclipse-paho/paho.mqtt.java#1087 · Filter by author vpeddada-tibco opened on Sep 3, 2025

• Getting java.lang.OutOfMemoryError: Java heap space

  eclipse-paho/paho.mqtt.java#1084 · Filter by author Salman83 opened on Aug 6, 2025

• Exception should be throw form here after log so that it can be catch in caller method like publish

  eclipse-paho/paho.mqtt.java#1080 · Filter by author hinahalani19 opened on Jul 28, 2025

• Provide connection state API during reconnection attempts when disconnecting

  eclipse-paho/paho.mqtt.java#1079 · Filter by author tartea opened on Jul 25, 2025

• Found incompatible version v1.2.6 for mqttv3 and mqttv5 in the pom.xml for org.eclipse.paho.sample.mqttclient project

  eclipse-paho/paho.mqtt.java#1077 · Filter by author stutiuneyal opened on Jun 20, 2025

• Add a pom.xml for org.eclipse.paho.sample.mqttv3app sample to make it maven compliant

  eclipse-paho/paho.mqtt.java#1076 · Filter by author stutiuneyal opened on Jun 17, 2025

• Does the paho client have a buffering mechanism when lot's of message arrived with high concurrency in subscription ?

  eclipse-paho/paho.mqtt.java#1075 · Filter by author killerqi520 opened on Jun 16, 2025

• Incorrect casting in v5 ClientState persistBufferedMessage

  eclipse-paho/paho.mqtt.java#1073 · Filter by author Jugen opened on May 20, 2025

• QoS 2 PUBLISH Rejected with Packet Identifier In Use (RC 145) Immediately After Previous QoS 2 Flow Completion

  eclipse-paho/paho.mqtt.java#1072 · Filter by author fuuhoo opened on Apr 30, 2025

• MQTTAsyncClient stuck on broken broker IP — reconnect(), disconnect() don't work

  eclipse-paho/paho.mqtt.java#1071 · Filter by author bogdanspbm opened on Apr 1, 2025

• org.eclipse.paho.mqttv5.common.MqttException: Internal error, caused by no new message IDs being available

  eclipse-paho/paho.mqtt.java#1070 · Filter by author PengZhouSY opened on Mar 13, 2025

• Error while loading shared libraries libpaho-mqtt3c.so.1

  eclipse-paho/paho.mqtt.java#1066 · Filter by author GowriNamboodiri opened on Jan 30, 2025

• Mqtt client does NOT auto reconnect when receiving exception "Timed out as no write activity"

  eclipse-paho/paho.mqtt.java#1065 · Filter by author pentolone opened on Dec 19, 2024