Периодическая ошибка «Нет подходящего HttpMessageConverter» во время вызовов API в Spring Boot – как устранить неполадку ⇐ JAVA

[Anonymous]

Подробности о проблеме:
Ошибка появляется случайным образом во время вызовов API, и в журнале отображается следующее:

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org.springframework.web.client.RestClientException: No suitable HttpMessageConverter found for response type [X] and content type [application/json]

After restarting the application, the issue typically does not resurface until the next release or redeployment.
The same issue does not occur in the local environment when I try to simulate load (I used tools to simulate high concurrency with 10,000 requests).

>Конфигурация RestTemplate:

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I have a custom RestTemplate bean defined in a configuration class, where I explicitly add MessageConverters, including MappingJackson2HttpMessageConverter to handle JSON responses.
The issue occurs despite ensuring that the RestTemplate is configured properly with converters at startup.

Замеченное поведение:

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When I initialize RestTemplate in the configuration class, it shows 7 MessageConverters.
However, during runtime (when making an API call), I notice the RestTemplate has 16 MessageConverters, suggesting that converters are being added somewhere during the application lifecycle.
The RestTemplate is injected into the service using @Autowired, and no @Qualifier or additional RestTemplate beans are being used.

Что я пробовал:

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I excluded RestTemplateAutoConfiguration to avoid auto-configuration of RestTemplate, but the issue persists.
I’ve checked for multiple RestTemplate beans and made sure the correct instance is being used.
I added logging around RestTemplate initialization to track when the MessageConverters are being modified, but I can’t pinpoint the source of the change.
High concurrency tests locally don’t reproduce the issue, which mostly happens in production or staging environments.

Пример журнала ошибок:

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The error message I see in the logs is:

org.springframework.web.client.RestClientException: No suitable HttpMessageConverter found for response type [X] and content type [application/json]

The HttpMessageConverter for application/json should be present (MappingJackson2HttpMessageConverter), but it appears to get lost or altered at some point during runtime.

Key Questions:
What could be causing additional MessageConverters to be added to the RestTemplate after it has been initialized?
Could concurrency or load affect the behavior of HttpMessageConverter, and how can I better reproduce this locally?
Is there a way to reinitialize the RestTemplate bean or the converters dynamically in case this issue arises, as the problem seems to go away after restarting the app?

Будем очень признательны за любые рекомендации по устранению этой проблемы или предложения по потенциальной основной причине!

Подробнее здесь: https://stackoverflow.com/questions/790 ... n-spring-b