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ProFTPD -  "received SIGHUP -- master server rehashing configuration file"

Posted on 2010-08-23
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Last Modified: 2013-12-02
I have a dedicated linux server CentOS Linux 5.5 running  ProFTPD 1.3 (set up via Webim/Usermin). It is at present a very quiet server, but eventually I hope to use it for some quite hefty FTP.

I saw this odd entry in the logs -

mydomain.net - received SIGHUP -- master server rehashing configuration file
IPv6 getaddrinfo 'mydomain.net' error: Name or service not known
mydomain.net - error setting IPV6_V6ONLY: Protocol not available


What do these lines mean? What's the problem, and how do I fix it?
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Question by:PaliTree
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woolmilkporc earned 500 total points
ID: 33501658
Hi,
there is no problem.
The proftpd server received a SIGHUP (hangup signal), most probably from logfile rotation (I assume you use logrotate? Check root's crontab!) which caused closing/reopening of its logfile as well as rehashing its config .file.
The IPv6 message is quite normal in an environment where this protocol version is not being used.
wmp
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by:PaliTree
ID: 33501918
Thanks woolmilkporc.

That's reassuring. Yes I'm using logrotate.

The only thing is - what would happen if ProFTPD was in the middle of managing a very large file upload when this happens? e.g. one taking around 24 hours! Do you know if that would cause the upload to be aborted (with restart required from the beginning?)

If so, I'm going to need to figure out a script to detect if an upload is in progress before running logrotate.



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by:woolmilkporc
ID: 33501971
You should try to find out how exactly logrotate handles the logs.
There must be a logrotate script, most probably in /etc/logrotate.d/... containing the name of the xfer logile and the actions to be taken.
Please check!
And - no, a SIGHUP alone will not cause proftpd to abort a transfer.
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