Phabricator Arcanist - Unable to install signal handler, pcntl_signal()

Question

I have a script that is meant to send a comment on a differential revision and is meant to update harbour master on whether the CI build was successful. Lately I've been receiving the following error:

PCNTL [49m[m Unable to install signal handler, pcntl_signal() unavailable. Continuing without signal handling.
[2022-11-10 11:34:30] EXCEPTION: (Exception) Failed to s

I've tried PHP version 8.1 and 5.6 no luck. Does anyone know a solution? Much appriated.

Full log:

[Pipeline] sh
echo '{"transactions":[{"type":"comment","value":"failed: http://jenkins.lab.local:8080/job/Lemington_build/685/"}],"objectIdentifier":"D43951"}'
arc --trace --conduit-token <secret_token> --conduit-uri http://phabricator.lab.local/ call-conduit differential.revision.edit
[1m[45m ARGV [49m[m "C:/Program Files/Arcanist/arcanist/bin/arc" --trace --conduit-token <secret_token> --conduit-uri http://phabricator.lab.local/ call-conduit differential.revision.edit
[1m[45m PCNTL [49m[m Unable to install signal handler, pcntl_signal() unavailable. Continuing without signal handling.
[2022-11-10 11:34:30] EXCEPTION: (Exception) Failed to set socket nonblocking! at [<arcanist>\src\channel\PhutilSocketChannel.php:51]
arcanist(head=master, ref.master=85c953ebe4a6)
  #0 PhutilSocketChannel::__construct(resource) called at [<arcanist>\src\workflow\ArcanistWorkflow.php:2414]
  #1 ArcanistWorkflow::readStdin() called at [<arcanist>\src\workflow\ArcanistCallConduitWorkflow.php:46]
  #2 ArcanistCallConduitWorkflow::runWorkflow(PhutilArgumentParser) called at [<arcanist>\src\workflow\ArcanistWorkflow.php:227]
  #3 ArcanistWorkflow::executeWorkflow(PhutilArgumentParser) called at [<arcanist>\src\toolset\ArcanistPhutilWorkflow.php:21]
  #4 ArcanistPhutilWorkflow::execute(PhutilArgumentParser) called at [<arcanist>\src\parser\argument\PhutilArgumentParser.php:492]
  #5 PhutilArgumentParser::parseWorkflowsFull(array) called at [<arcanist>\src\runtime\ArcanistRuntime.php:171]
  #6 ArcanistRuntime::executeCore(array) called at [<arcanist>\src\runtime\ArcanistRuntime.php:37]
  #7 ArcanistRuntime::execute(array) called at [<arcanist>\support\init\init-arcanist.php:6]
  #8 require_once(string) called at [<arcanist>\bin\arc:10]

I've tried PHP version 8.1 and 5.6 no luck. Also tried the arc upgrade command but I'm on latest version

Please provide enough code so others can better understand or reproduce the problem. — Community, Nov 11 '22 at 09:10

score 0 · Answer 1 · answered Nov 11 '22 at 23:35

You are getting this error because your local version of PHP must not be compiled with pcntl_signal

You can check if it is supported with the following command

 php -i | grep pcntl

Which should result in

pcntl
pcntl support => enabled

This link in the PHP Manual is the instructions for installation - https://www.php.net/manual/en/pcntl.installation.php

Phabricator Arcanist - Unable to install signal handler, pcntl_signal()

1 Answers1