Description:
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Gearman jobs are passed to more than one worker if they throw and catch an exception in the way shown in the code below.

I have installed gearmand 0.27 and the pecl-package in version 1.0.2. It also appeared in version 1.0.1. I didn't test it in older versions.

Test script:
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Please start geramand, put this code into a file and run it on cli:

http://www.pastie.org/3426030

The script needs write permissions in its folder (it writes a log file to pass the information between worker and client instance). You can also change the method doNormal() into doBackground(). In this case uncomment the sleep call.

Also try the run modes exception-sleep and standard (value of $sWorker in line 5). The error will not appear then.

I think you have to change some lines if you want to run this on Windows.

The script first checks if there are no "test" workers running and no "test" jobs in the queue. Then it starts 100 "test"-workers (same script called with a "worker" parameter). Then it runs 50 test jobs. The workers are writing their PID, the job handle and the random workload into a log file and after all jobs are done the client script analyses the log file and kills all workers.

Expected result:
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The script should output "No job has been passed to more than one worker."

Actual result:
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The script outputs "Those jobs has been passed more than one times to a worker" and a list of some jobs that have been passed two, three or even more times to a worker.