Question

I’m trying to run the example Gearman worker from their documentation (see below), but every time I do I get a slew of errors in my Gearman log file like this: FATAL [ 0] gearman_packet_unpack_header:invalid command value. When I run the Gearman client (again, their own example), it doesn’t seem to change anything. Nothing happens.

Here is the sample worker code that is failing

# Create our worker object.
$worker= new GearmanWorker();

# Add default server (localhost).
$worker->addServer();

# Register function "reverse" with the server.
$worker->addFunction("reverse", "reverse_fn");

while (1)
{
  print "Waiting for job...\n";

  $ret= $worker->work();
  if ($worker->returnCode() != GEARMAN_SUCCESS)
    break;
}

# A much simple reverse function
function reverse_fn($job)
{
  $workload= $job->workload();
  echo "Received job: " . $job->handle() . "\n";
  echo "Workload: $workload\n"; 
  $result= strrev($workload);
  echo "Result: $result\n";
  return $result;
}

>php -i:

extension version   1.0.2
libgearman version  0.29
Default TCP Host    localhost
Default TCP Port    4730

>gearmand -V:

gearmand 0.29

How do I correctly configure Gearman to work? libgearman is the same version as gearmand, and my PECL extension is the most-recent stable version. I’m not sure what else to try.

Answer 1

As far as I was able to tell, the PECL extension for Gearman as version 1.0.2 does not work with Gearman version 0.29. I updated Gearman and libgearman both to version 0.33, and as soon as I did my extension was working.