Differences between requires_new and nested propagation in Spring transactions

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See this link: PROPAGATION_NESTED versus PROPAGATION_REQUIRES_NEW? Juergen Hoeller explain it very well. — the Spring Source Forum is completely offline since February 28, 2019, but you can read the relevant part of the article in the quote below

PROPAGATION_REQUIRES_NEW starts a new, independent “inner” transaction
for the given scope. This transaction will be committed or rolled back
completely independent from the outer transaction, having its own
isolation scope, its own set of locks, etc. The outer transaction will
get suspended at the beginning of the inner one, and resumed once the
inner one has completed. …

PROPAGATION_NESTED on the other hand starts a “nested” transaction,
which is a true subtransaction of the existing one. What will happen
is that a savepoint will be taken at the start of the nested
transaction. Íf the nested transaction fails, we will roll back to
that savepoint. The nested transaction is part of of the outer
transaction, so it will only be committed at the end of of the outer
transaction. …

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