Resource temporarily unavailable.

[Don]

My Monit 5.14 from centos 6 frequently reports alerts such as:

"DNS: error receiving response -- Resource temporarily unavailable."

"HTTP: Error receiving data -- Resource temporarily unavailable."

But is it actually problem of monitored server or monitoring server? If it's just EINTR you should just restart read() or whatever syscall you do - this is not problem of monitored service, but bug in Monit itself.

$ man read

EINTR The call was interrupted by a signal before any data was read.

[Tildeslash]

Monit 5.14 was released over 2 years ago. I believe we have fixed most of these spurious errors arising from network connections and the corresponding error message in later Monit releases. Please upgrade to the latest Monit version.

[Don]

Thanks! Well, EPEL provides just 5.14, and you don't want to provide a repo.

[Tildeslash]

Fixed: Issue #577: Non-SSL connections may return confusing message "Resource temporarily unavailable" on timeout.

→ <<cset 3cd7706629e6>>

[Don]

Thanks! Was I correct to interpret "Resource temporarily unavailable" as request timeout?

[Tildeslash]

yes ... the network read timed out, but it left the errno set to EAGAIN (which is described as "Resource temporarily unavailable") on return, so the event description was confusing.

[Don]

Ah, thx!

[Tildeslash]

Issue #574 was marked as a duplicate of this issue.