Troubleshooting ‘springSecurityFilterChain’ Threw java.lang.IllegalArgumentException: Providers List Cannot Contain Null Values

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Introduction Have you encountered the frustrating error message in your Spring Boot application: ‘springSecurityFilterChain’ threw java.lang.IllegalArgumentException: providers list cannot contain null values? Don’t worry; you’re not alone. In this article, we will delve into the causes behind this error and provide you with effective troubleshooting steps to resolve it. So, let’s get started! Understanding the…

Spring Security 5 Replacement for OAuth2RestTemplate: A Simple and Effective Solution

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Introduction: In recent versions of Spring Security, classes like OAuth2RestTemplate, OAuth2ProtectedResourceDetails, and ClientCredentialsAccessTokenProvider have been marked as deprecated. This has led to confusion among developers looking for a suitable replacement in the core Spring Security 5 project. In this blog post, we will explore an alternative approach to using OAuth2RestTemplate and discuss how to implement…