- Software and systems
- Database
08003
PostgreSQL 08003: connection_does_not_exist
Evidence linked to this decision
View source: PostgreSQL 18 Appendix A: Error CodesRisk level
Medium
Proceed carefully and stop if the check is unclear.
Urgency
Medium
Quick answer
SQLSTATE 08003 (connection_does_not_exist) means the application tried to use a connection that no longer exists. Diagnose the named condition before retrying.
Safety first
Safe checks you can perform
- Trace the connection lifecycle
What a technician must be able to justify
A technician is coming
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Trace the connection lifecycle
Match the failing connection or pool slot to its checkout, close and eviction events. Discard that handle and acquire a new connection; if stale handles recur, align pool lifetime, validation and server or proxy idle timeouts instead of retrying on the dead handle.
Evidence: PostgreSQL 18 Appendix A: Error Codes · PostgreSQL error and notice fields · PostgreSQL database connection control functions
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Virtual technician
Does 08003 still appear after these checks?
This guided flow uses the exact code and your answers to choose a test, an expected result and the next branch.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Software and systems
- Brand
- PostgreSQL
- Product type
- Database
Known code variants
- connection_does_not_exist
- PostgreSQL 08003
- SQLSTATE 08003
What it means
PostgreSQL assigns 08003 to connection_does_not_exist in Class 08 — Connection Exception. Applications should branch on the stable SQLSTATE and structured error fields, not localized message text.
Symptoms and causes
Probable causes · in order
- Likely trigger in this requestCommon
A closed, expired or evicted pooled connection was reused after its session had already ended.
Evidence: PostgreSQL 18 Appendix A: Error Codes · PostgreSQL error and notice fields · PostgreSQL database connection control functions
Sources and technical references
- 1
PostgreSQL 18 Appendix A: Error Codes
PostgreSQL Global Development Group · 2026 · official_doc
- 2
PostgreSQL error and notice fields
PostgreSQL Global Development Group · 2026 · official_doc
- 3
PostgreSQL database connection control functions
PostgreSQL Global Development Group · 2026 · official_doc
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