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[X] Bug exists Release Version 1.2.5 ( Master Branch)
[ ] Bug exists in MQTTv3 Client on Snapshot Version 1.2.6-SNAPSHOT (Develop Branch)
[ ] Bug exists in MQTTv5 Client on Snapshot Version 1.2.6-SNAPSHOT (Develop Branch)
I am building a Spring application where I have to subscribe to topics during runtime. Using the Spring integration's Mqttv5PahoMessageDrivenChannelAdapter I am calling addTopics(), which subsequently ends up calling subscribe() on MqttAsyncClient. The problem arises when adding a subscription when the client is already active. Here is a trace of the chain of events:
Caused by: java.lang.IndexOutOfBoundsException: Index 0 out of bounds for length 0
at java.base/jdk.internal.util.Preconditions.outOfBounds(Preconditions.java:64) ~[na:na]
at java.base/jdk.internal.util.Preconditions.outOfBoundsCheckIndex(Preconditions.java:70) ~[na:na]
at java.base/jdk.internal.util.Preconditions.checkIndex(Preconditions.java:266) ~[na:na]
at java.base/java.util.Objects.checkIndex(Objects.java:359) ~[na:na]
at java.base/java.util.ArrayList.get(ArrayList.java:427) ~[na:na]
at org.eclipse.paho.mqttv5.client.MqttAsyncClient.subscribe(MqttAsyncClient.java:1276) ~[org.eclipse.paho.mqttv5.client-1.2.5.jar:na]
at org.eclipse.paho.mqttv5.client.MqttAsyncClient.subscribe(MqttAsyncClient.java:1205) ~[org.eclipse.paho.mqttv5.client-1.2.5.jar:na]
at org.springframework.integration.mqtt.inbound.Mqttv5PahoMessageDrivenChannelAdapter.addTopic(Mqttv5PahoMessageDrivenChannelAdapter.java:257) ~[spring-integration-mqtt-6.0.2.jar:6.0.2]
at org.springframework.integration.mqtt.inbound.AbstractMqttMessageDrivenChannelAdapter.addTopics(AbstractMqttMessageDrivenChannelAdapter.java:301) ~[spring-integration-mqtt-6.0.2.jar:6.0.2]
It seems that the issue arises from the fact that subscribe is called with a freshly constructed MqttProperties -> MqttAsyncClient.java:1205. These properties are evaluated in MqttAsyncClient.java:1276:
@Override
public IMqttToken subscribe(MqttSubscription[] subscriptions, Object userContext, MqttActionListener callback,
IMqttMessageListener messageListener, MqttProperties subscriptionProperties) throws MqttException {
int subId = subscriptionProperties.getSubscriptionIdentifiers().get(0); // <- Issue is here, properties are new so the ArrayList is not populated
This obviously throws an exception and prevents the client from adding any topics at runtime.
Please fill out the form below before submitting, thank you!
I am building a Spring application where I have to subscribe to topics during runtime. Using the Spring integration's
Mqttv5PahoMessageDrivenChannelAdapterI am callingaddTopics(), which subsequently ends up callingsubscribe()onMqttAsyncClient. The problem arises when adding a subscription when the client is already active. Here is a trace of the chain of events:It seems that the issue arises from the fact that subscribe is called with a freshly constructed
MqttProperties->MqttAsyncClient.java:1205. These properties are evaluated inMqttAsyncClient.java:1276:This obviously throws an exception and prevents the client from adding any topics at runtime.