On Tue, Dec 20, 2016 at 06:16:59PM +0100, Lucas Nussbaum wrote: > It seems to be a random issue. Apparently I was unlucky as it failed > twice in a row for me (when doing archive rebuilds, I automatically > retry failed builds once to avoid random issues). > > Doing: > for i in $(seq 0 9); do su user42 -c 'sbuild -n -A -s --force-orig-source > --apt-update -d unstable -v xapian-bindings' &> xapian$i.log ; done > > I get: > # grep Status xapian?.log > xapian0.log:Status: attempted > xapian1.log:Status: attempted > xapian2.log:Status: attempted > xapian3.log:Status: successful > xapian4.log:Status: attempted > xapian5.log:Status: successful > xapian6.log:Status: successful > xapian7.log:Status: attempted > xapian8.log:Status: successful > xapian9.log:Status: attempted
$ for i in $(seq 0 9); do sbuild -n -A -s --force-orig-source --apt-update -d unstable -v xapian-bindings &> xapian$i.log ; done $ grep Status xapian?.log xapian0.log:Status: successful xapian1.log:Status: successful xapian2.log:Status: successful xapian3.log:Status: successful xapian4.log:Status: successful xapian5.log:Status: successful xapian6.log:Status: successful xapian7.log:Status: successful xapian8.log:Status: successful xapian9.log:Status: successful > Note that this machine has 64 cores FWIW, the machine I tested on has 8. > but I didn't set DEB_BUILD_OPTIONS=parallel=n. So it seems that the > buildsystem somehow tries to figure out the number of available cores and use > that.(?) There's nothing like that upstream, and debian/rules only passes -jN if it sees parallel=N in DEB_BUILD_OPTIONS: http://sources.debian.net/src/xapian-bindings/1.4.1-1/debian/rules/#L130 It might be that javac compiles dependency .class files and parallelises that automatically, but if it does it presumably must take care of inter-build locking or else it would fail a lot. Clearly something is amiss, but I have no idea what. I only added the packaging of the java bindings a few months ago, so bisecting the history is unlikely to be useful. Are diffs between your good and bad logs illuminating? Cheers, Olly
