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Add locking module: optimistic vs pessimistic locking on Hibernate 7.4.14.Final

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Co-Authored-By: Claude Sonnet 5.5 <[email protected]>
Claude-Session: https://claude.ai/code/session_01YPgGH6aMbSLANL3E2HHmS6
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asmhatre
2026-10-25 17:01:49 +00:00
co-authored by Claude Sonnet 5.5
parent 807f681ed1
commit 357ba84e5c
18 changed files with 758 additions and 0 deletions
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locking/output/07-deadlock.txt
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opposite lock order (A: 1 then 2, B: 2 then 1)
transactions that failed: 1
jakarta.persistence.PessimisticLockException
caused by org.hibernate.exception.LockAcquisitionException
caused by org.h2.jdbc.JdbcSQLTransactionRollbackException
H2 message: Deadlock detected. The current transaction was rolled back. Details: "ACCOUNT"; SQL statement:
caused by org.h2.mvstore.MVStoreException
same lock order for both (always the lower id first)
transactions that failed: 0