Medical conditions known to cause swelling that affects both legs equally include heart disease, kidney disease, liver disease, and chronic sleep apnea, and complications of diabetes. Premenstrual syndrome (PMS) is also a well-known cause of swelling in the ankles and feet.
Definition of serendipity for English Language Learners. : luck that takes the form of finding valuable or pleasant things that are not looked for.
This is particularly important to a microservices architecture because the microservice preference towards choreography and event collaboration leads to emergent behavior. While many pundits praise the value of serendipitous emergence, the truth is that emergent behavior can sometimes be a bad thing.