[FIXED] Spring boot application fails to start after upgrading to 2.6.0 due to circular dependency[ unresolvable circular reference]

Issue

Spring boot upgrade Error

Spring boot application fails to start after upgrading to 2.6.0 due to circular dependency

Error creating bean with name 'securityConfig': 
Requested bean is currently in creation: Is there an 
      unresolvable circular reference?

Solution

Circular References Prohibited by Default in spring boot version 2.6

If your application fails to start due to a BeanCurrentlyInCreationException you are strongly encouraged to update your configuration to break the dependency cycle.

The temporary solution is to restore 2.5’s behavior, set the following in .properties/yml,

spring: 
  main:
    allow-circular-references: true

Answered By - Thirumal
Answer Checked By - Terry (JavaFixing Volunteer)