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Concurrent hydra-evaluator

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This rewrites the top-level loop of hydra-evaluator in C++. The Perl
stuff is moved into hydra-eval-jobset. (Rewriting the entire evaluator
would be nice but is a bit too much work.) The new version has some
advantages:

* It can run multiple jobset evaluations in parallel.

* It uses PostgreSQL notifications so it doesn't have to poll the
  database. So if a jobset is triggered via the web interface or from
  a GitHub / Bitbucket webhook, evaluation of the jobset will start
  almost instantaneously (assuming the evaluator is not at its
  concurrency limit).

* It imposes a timeout on evaluations. So if e.g. hydra-eval-jobset
  hangs connecting to a Mercurial server, it will eventually be
  killed.
This commit is contained in:
Eelco Dolstra
2016-10-13 15:53:05 +02:00
parent 16feddd5d4
commit e0b2921ff2
15 changed files with 325 additions and 55 deletions
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2
tests/Setup.pm
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@ -61,7 +61,7 @@ sub createJobsetWithOneInput {
sub evalSucceeds {
my ($jobset) = @_;
my ($res, $stdout, $stderr) = captureStdoutStderr(60, ("hydra-evaluator", $jobset->project->name, $jobset->name));
my ($res, $stdout, $stderr) = captureStdoutStderr(60, ("hydra-eval-jobset", $jobset->project->name, $jobset->name));
chomp $stdout; chomp $stderr;
print STDERR "Evaluation errors for jobset ".$jobset->project->name.":".$jobset->name.": \n".$jobset->errormsg."\n" if $jobset->errormsg;
print STDERR "STDOUT: $stdout\n" if $stdout ne "";