I've packaged the patch from comment #9 into a PPA for testing purposes:
https://launchpad.net/~bryce/+archive/ubuntu/bind9-sru-1804542
To test with this, first ensure you can reproduce the issue in a reliably consistent way, then install this package and run it for a similar period with similar conditions.
I've packaged the patch from comment #9 into a PPA for testing purposes:
https:/ /launchpad. net/~bryce/ +archive/ ubuntu/ bind9-sru- 1804542
To test with this, first ensure you can reproduce the issue in a reliably consistent way, then install this package and run it for a similar period with similar conditions.