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Editorial Team
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Asked: 2026-05-12T12:30:13+00:00

Is there a way one EntityManager can participate smoothely in multiple concurrent transactions? Well,

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Is there a way one EntityManager can participate smoothely in multiple concurrent transactions?

Well, not that concurrent. Something like:

  1. Start tx 1
  2. Do stuff in tx 1
  3. Start tx 2
  4. Do stuff in tx 2
  5. Commit tx 2
  6. Join tx 1 back
  7. Do stuff in tx 1
  8. Commit tx 1

with steps followed one by one not overlapping.

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1 Answer

  1. Editorial Team

    Separate transactions? No, it can not.

    Attempting to call EntityTransaction.begin() on a currently active transaction (which is what you would have to do, diretly or indirectly) will result in IllegalStateException being thrown.

    Unit of work / transaction scope concepts are explained in detail in the Hibernate EntityManager manual.

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