[pgpool-general: 8201] Re: unable to read data from frontend

Tatsuo Ishii ishii at sraoss.co.jp
Thu Jun 2 14:24:00 JST 2022

> Hello,
> Pgpool works in Kubernetes with 3 replicas. Docker image
> pgpool/pgpool:4.2.2 is used.
> One of the clients of Pgpool is Kong API Gateway. Periodically the
> follow error log message is appeared in Pgpool log:
> -----------------------------
> pgmoon [10170] kong at kongdb |ERROR:  unable to read data from frontend
> pgmoon [10170] kong at kongdb |DETAIL:  EOF encountered with frontend
> -----------------------------
> pgmoon is a PostgreSQL client library that is used by Kong.
> My questions are:
> 1. Why is this error happening?

It has been already answered here:

> 2. How I can fix it?

Ask the pgmoon developer to fix it.

> 3. How does this bug seriously affect the stability and performance of
> Pgpool?

There should be no concern about Pgpool stability. It may affect the
performance of Pgpool if the error happens too frequently though,
because of the extra logging of the error message.

Best reagards,
Tatsuo Ishii
SRA OSS, Inc. Japan
English: http://www.sraoss.co.jp/index_en.php

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