PostgreSQL Error Reference

Every error, explained

SQLSTATE codes, condition names, root causes, diagnostic queries, and recovery steps — structured for engineers running PostgreSQL in production.

3910 errors documentedFree diagnostics on every pageAll PG versions covered

Showing 96 of 3910 errors

08P01 ERROR

unsupported SCRAM channel-binding type “…” — 08P01

protocol_violation

PostgreSQL error "unsupported SCRAM channel-binding type "…"" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

non-printable characters in SCRAM nonce — 08P01

protocol_violation

PostgreSQL error "non-printable characters in SCRAM nonce" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

unexpected SCRAM channel-binding attribute in client-final-message — 08P01

protocol_violation

PostgreSQL error "unexpected SCRAM channel-binding attribute in client-final-message" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

expected password response, got message type n — 08P01

protocol_violation

PostgreSQL error "expected password response, got message type n" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

invalid password packet size — 08P01

protocol_violation

PostgreSQL error "invalid password packet size" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

expected GSS response, got message type n — 08P01

protocol_violation

PostgreSQL error "expected GSS response, got message type n" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

expected SSPI response, got message type n — 08P01

protocol_violation

PostgreSQL error "expected SSPI response, got message type n" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 FATAL

terminating connection because protocol synchronization was lost — 08P01

protocol_violation

PostgreSQL error "terminating connection because protocol synchronization was lost" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

no data left in message — 08P01

protocol_violation

PostgreSQL error "no data left in message" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

insufficient data left in message — 08P01

protocol_violation

PostgreSQL error "insufficient data left in message" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

invalid string in message — 08P01

protocol_violation

PostgreSQL error "invalid string in message" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

invalid message format — 08P01

protocol_violation

PostgreSQL error "invalid message format" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 FATAL

invalid startup packet layout: expected terminator as last byte — 08P01

protocol_violation

PostgreSQL error "invalid startup packet layout: expected terminator as last byte" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

primary reported unexpected file name for timeline history file of… — 08P01

protocol_violation

PostgreSQL error "primary reported unexpected file name for timeline history file of timeline n" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

invalid WAL message received from primary — 08P01

protocol_violation

PostgreSQL error "invalid WAL message received from primary" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

invalid keepalive message received from primary — 08P01

protocol_violation

PostgreSQL error "invalid keepalive message received from primary" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

invalid replication message type n — 08P01

protocol_violation

PostgreSQL error "invalid replication message type n" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 FATAL

invalid standby message type “…” — 08P01

protocol_violation

PostgreSQL error "invalid standby message type "…"" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

could not receive database system identifier and timeline ID from t… — 08P01

protocol_violation

PostgreSQL error "could not receive database system identifier and timeline ID from the primary server: …" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

unexpected result set after end-of-streaming — 08P01

protocol_violation

PostgreSQL error "unexpected result set after end-of-streaming" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

error reading result of streaming command: … — 08P01

protocol_violation

PostgreSQL error "error reading result of streaming command: …" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

unexpected result after CommandComplete: … — 08P01

protocol_violation

PostgreSQL error "unexpected result after CommandComplete: …" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

could not receive timeline history file from the primary server: … — 08P01

protocol_violation

PostgreSQL error "could not receive timeline history file from the primary server: …" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception
08P01 ERROR

could not create replication slot “…”: … — 08P01

protocol_violation

PostgreSQL error "could not create replication slot "…": …" (SQLSTATE 08P01, protocol_violation): what it means, common causes, and how to fix it.

Connection Exception