[Pgpool-general] health check failed due an Interrupted system call

[Christophe Philemotte]

Hi all,

Yesterday, one of my backend node was degenerated because of a health
check fail.

010-02-28 18:13:41 ERROR: pid 23996: health check failed during read.
host X at port 5432 is down. reason: Interrupted system call
2010-02-28 18:14:04 LOG:   pid 23996: set 0 th backend down status
2010-02-28 18:14:04 LOG:   pid 23996: starting degeneration. shutdown
host X(5432)
2010-02-28 18:14:07 LOG:   pid 23996: failover_handler: set new master
node: 1
2010-02-28 18:14:07 LOG:   pid 23996: failover done. shutdown host X(5432)

I've looked in the source code which system call is (in main.c pgpool-II
2.3.2.1). It seems that its is read().

It is the first time I notice this kind of error. Usually, it a timed
out connection one. So, I'm not confident about reproducing it.

How can I interpret this error? Is it simply because read() was blocked?

Christophe Philemotte