diff options
| -rwxr-xr-x | scripts/build-remote.pl.in | 20 |
1 files changed, 17 insertions, 3 deletions
diff --git a/scripts/build-remote.pl.in b/scripts/build-remote.pl.in index 8bf77df04..fca00241b 100755 --- a/scripts/build-remote.pl.in +++ b/scripts/build-remote.pl.in @@ -232,10 +232,24 @@ sub removeRoots { # the same missing path simultaneously, causing the effective network # bandwidth and target disk speed to be divided by N. my $uploadLock = "$currentLoad/$hostName.upload-lock"; -sysopen MAINLOCK, "$uploadLock", O_RDWR|O_CREAT, 0600 or die; -flock(MAINLOCK, LOCK_EX) or die; +sysopen UPLOADLOCK, "$uploadLock", O_RDWR|O_CREAT, 0600 or die; +eval { + local $SIG{ALRM} = sub { die "alarm\n" }; + # Don't wait forever, so that a process that gets stuck while + # holding the lock doesn't block everybody else indefinitely. + # It's safe to continue after a timeout, just (potentially) + # inefficient. + alarm 15 * 60; + flock(UPLOADLOCK, LOCK_EX); + alarm 0; +}; +if ($@) { + die unless $@ eq "alarm\n"; + print STDERR "somebody is hogging $uploadLock, continuing...\n"; + unlink $uploadLock; +} Nix::CopyClosure::copyTo($hostName, [ @sshOpts ], [ $drvPath, @inputs ], "", "", 0, 0, $maybeSign ne ""); -close MAINLOCK; +close UPLOADLOCK; # Perform the build. |