Hi all,

we have a strange problem with bind since version 9.11.15. I hoped this would disappear with 9.11.17 but it did not :-(

We are running several binds on different VMs (Proxmox). Only on two of them the problem occurs (both are secondary-only server, the third secondary-only server does not show this problem). The server holds about 4500 zones and serves about 300 queries/s. There is enough free momory available.

After installation bind runs for some minutes and than you get the following:

--- cut here ---
23-Mar-2020 09:17:43.934 rbtdb.c:2097: INSIST(!((void *)((node)->deadlink.prev) != (void *)(-1))) failed, back trace
23-Mar-2020 09:17:43.934 #0 0x43fecd in ??
23-Mar-2020 09:17:43.934 #1 0x7f44795adcaa in ??
23-Mar-2020 09:17:43.934 #2 0x7f447a872da5 in ??
23-Mar-2020 09:17:43.934 #3 0x7f447a882d6c in ??
23-Mar-2020 09:17:43.934 #4 0x44e3fd in ??
23-Mar-2020 09:17:43.934 #5 0x4585b8 in ??
23-Mar-2020 09:17:43.934 #6 0x4353f6 in ??
23-Mar-2020 09:17:43.934 #7 0x7f44795d79c7 in ??
23-Mar-2020 09:17:43.934 #8 0x7f4478758064 in ??
23-Mar-2020 09:17:43.934 #9 0x7f447812662d in ??
23-Mar-2020 09:17:43.934 exiting (due to assertion failure)
--- cut here ---

For compilation is configured like this:

--- cut here ---
        ./configure --prefix=/usr \
                --mandir=\$${prefix}/share/man \
                --libdir=\$${prefix}/lib/$(DEB_HOST_MULTIARCH) \
                --infodir=\$${prefix}/share/info \
                --sysconfdir=/etc/bind \
                --with-python=python3 \
                --localstatedir=/ \
                --enable-threads \
                --enable-largefile \
                --with-libtool \
                --enable-shared \
                --enable-static \
                --with-openssl=/usr \
                --with-gssapi=/usr \
                --with-gnu-ld \
                --enable-ipv6 \
                --enable-filter-aaaa
                #--disable-atomic \
--- cut here ---

As you can see, I already tried what happens when using "--disable-atomic"... but it also stops.

Also I tried to run configure with a smaller set of options:

--- cut here ---
        ./configure --prefix=/usr \
                --mandir=\$${prefix}/share/man \
                --libdir=\$${prefix}/lib/$(DEB_HOST_MULTIARCH) \
                --infodir=\$${prefix}/share/info \
                --sysconfdir=/etc/bind
--- cut here ---

Currently I have absolute no idea what to do to fix this problem. Can anybody help and show me the way how to go on?

TIA, Holger

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#####  #### ##  ##  Holger Wirtz       SOV-Hotline: (+49 30) 884299-9115
##  ## ##   ### ##  DFN-Verein         Phone:       (+49 30) 884299-40
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#####  ##   ##  ##  GERMANY            WWW:         http://www.dfn.de
GPG-Fingerprint: ABFA 1F51 DD8D 503C 85DC  0C51 E961 79E2 6685 9BCF
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