Does spring @Retryable create a new connection or use the same connection with server

Question

I have a Spring project wherein I am using @Retryable annotation on a method. The method calls an API and posts some json payload to it.

I have set maxAttempts as 4 and a retry delay of 20 ms using Backoff.

I am debugging an issue and hence trying to understand if @Retryable creates a new connection(a new thread) with the server where the API is hosted after the specified delay(20 ms in my case) or uses the same connection(same thread)

Answer 1

The @Retryable uses the RetryTemplate and that one has the logic like this:

        while (canRetry(retryPolicy, context) && !context.isExhaustedOnly()) {

            try {
                ...
                T result = retryCallback.doWithRetry(context);
                doOnSuccessInterceptors(retryCallback, context, result);
                return result;
            }
            catch (Throwable e) {

                ...

                if (canRetry(retryPolicy, context) && !context.isExhaustedOnly()) {
                    ...
                }

                ...
        }

So, all the retry attempts are happening on the same thread - the calling one.