[OpenWrt-Devel] [PATCH] rpcd: fix respawn settings

[Michael Jones]

On Fri, Mar 6, 2020 at 1:19 AM Jo-Philipp Wich <jo at mein.io> wrote:

> Hi,
>
> > rpcd crashes for me daily, to the point where i have a script that
> restarts it
> > every 5 minutes.
> >
> > It also gets hung a lot without crashing, and stops serving responses to
> ubus
> > traffic.
>
> I've never heard about anything like that until now, not even in the forum
> or
> IRC chatter. Getting some details here would be interesting.
>
> ~ Jo
>

I've reviewed the mailing list for the previous year, and found this post:

http://lists.infradead.org/pipermail/openwrt-devel/2019-October/019592.html

Which appears to have been merged into rpcd with this commit :
https://git.openwrt.org/?p=project/rpcd.git;a=commit;h=bd0ed2521476c3e5b6c1a0e0bd2c386ea809d74b

This post / commit appears to identify the same crash that my scripts cause.

However, the commit for the OpenWRT 18.06 branch (Still receiving security
fixes, as far as I can tell), has this commit for RPCD

https://github.com/openwrt/openwrt/blob/openwrt-18.06/package/system/rpcd/Makefile

commit 3aa81d0dfae167eccc26203bd0c96f3e3450f253
Author: Jo-Philipp Wich <jo at mein.io>
Date:   Wed Nov 28 12:12:04 2018 +0100

    file: access exec timeout via daemon ops structure

    Since the plugin is not linked, but dlopen()'d with RTLD_LOCAL, we
cannot
    access global rpcd variables but need to access them via the common ops
    structure symbol.

    Signed-off-by: Jo-Philipp Wich <jo at mein.io>



To see if that really fixed the issue, I will update my build of rpcd
from 3aa81d0dfae167eccc26203bd0c96f3e3450f253
to bd0ed2521476c3e5b6c1a0e0bd2c386ea809d74b (or git head, perhaps) to see
if the crash gets resolved.
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