My Spring Cloud Function does not get triggered and does not print the contents of the trigger method when deployed to Azure, but works fine on my local machine

Question

{

"scriptFile" : "../process-topic-payment-0.0.1-SNAPSHOT.jar",

"entryPoint" : "ca.on.gov.osc.process_topic_payment.ProcessTopicPaymentApplication.run",

"bindings" : [ {

"type" : "serviceBusTrigger",

"direction" : "in",

"name" : "message",

"queueName" : "paymentqueue",

"connection" : "POC_SB_QUEUE_CONNECTION_KEY"

} ]

}

Answer 1

Hello Terence !

Thank you for posting on MS Learn Q&A.

Your func is being triggered in Azure and the evidence is:

Executing 'Functions.PaymentEventHandlerTrigger'

and the same service bus message is retried with increasing DeliveryCount so the real issue is that the invocation doesn't finish and eventually hits:

Timeout value of 00:30:00 exceeded

I think your code is hanging before your custom logs are written.

Message messageTest =
    (Message) AzureFunctionUtil.enhanceInputIfNecessary(message, context);

For a normal Java Azure Function Service Bus trigger, you do not need this line since it can bind the message directly to a String.

So try to test first with the simplest possible handler:

@FunctionName("PaymentEventHandlerTrigger")
public void run(
    @ServiceBusQueueTrigger(
        name = "message",
        queueName = "paymentqueue",
        connection = "POC_SB_QUEUE_CONNECTION_KEY"
    ) String message,
    final ExecutionContext context
) {
    context.getLogger().info("Entered PaymentEventHandlerTrigger");
    context.getLogger().info("Message body: " + message);
}

and add a log before and after the Spring adapter line if you still need it:

context.getLogger().info("Before enhanceInputIfNecessary");
Message messageTest =
    (Message) AzureFunctionUtil.enhanceInputIfNecessary(message, context);
context.getLogger().info("After enhanceInputIfNecessary");

If you only see the first log so the Spring adapter call is blocking.

For Spring Cloud Function on Azure, you need to avoid mixing patterns. Either use a plain Azure Function handler with @ServiceBusQueueTrigger or follow the Spring Cloud Function adapter model properly.