PostgresDB 25002: Branch Transaction Already Active

A branch transaction is already active.
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What is

PostgresDB 25002: Branch Transaction Already Active

 ?

When encountering the error 25002: Branch Transaction Already Active in a Postgres database, the user should:

  1. Identify Active Transactions:
    • Run SELECT * FROM pg_stat_activity WHERE state = 'active'; to identify active transactions.
  2. Check for Long-Running Queries:
    • Use SELECT pid, now() - pg_stat_activity.query_start AS duration, query FROM pg_stat_activity WHERE state = 'active' ORDER BY duration DESC; to find long-running queries that might be causing the issue.
  3. Terminate Blocking Transactions:
    • If you identify a transaction that is safe to terminate, use SELECT pg_terminate_backend(pid); where pid is the process ID of the transaction to be terminated.
  4. Review Application Code:
    • Examine the application code interacting with the database for any potential issues causing nested transactions or not properly closing transactions.

Immediate action involves identifying and potentially terminating problematic transactions, and reviewing application logic for transaction handling.

Attached error: 
PostgresDB 25002: Branch Transaction Already Active
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