EC
HV00K
PostgreSQLERRORNotableForeign Data Wrapper ErrorHIGH confidence

fdw_reply_handle

What this means

A foreign data wrapper encountered an error with the reply handle used to receive results from a remote server, indicating a protocol or communication failure.

Why it happens
  1. 1Remote server closed the reply channel unexpectedly
  2. 2FDW internal reply handle was not properly initialised before use
  3. 3Network interruption during result retrieval from remote server
  4. 4FDW code bug — reply handle lifecycle error
How to reproduce

Fetching rows from a foreign table when remote communication fails mid-stream

trigger — this will error
trigger — this will error
SELECT * FROM foreign_table;  -- remote disconnects during fetch

expected output

ERROR:  HV00K: fdw_reply_handle

Fix

Check remote server connectivity

WHEN Remote server connection dropped mid-query

Check remote server connectivity
SELECT dblink_connect('myconn', 'host=remotehost dbname=mydb user=myuser');

Why this works

Confirms the remote server is reachable and accepting connections

What not to do

✕ Do not retry without diagnosing root cause

Repeated failures may indicate a persistent network or server issue

Sources
Official documentation ↗

https://www.postgresql.org/docs/current/errcodes-appendix.html

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