Only remove my process' pidfile. #15491
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gtanzillo
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Jun 30, 2017
Fryguy
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Jun 30, 2017
lib/pid_file.rb
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| @@ -27,7 +27,7 @@ def remove | |||
| def create(remove_on_exit = true) | |||
| FileUtils.mkdir_p(File.dirname(@fname)) | |||
| File.open(@fname, "w") { |f| f.write(Process.pid) } | |||
| at_exit { PidFile.remove(@fname) } if remove_on_exit | |||
| at_exit { PidFile.remove(@fname) if PidFile.new(@fname).pid == Process.pid } if remove_on_exit | |||
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Can this logic be pushed down into PidFile? Perhaps PidFile.remove! or PidFile.safe_remove?
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Gah...I didn't realize this was PidFile class 😖
Even so, what do you think of a different method to separate the concerns?
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We're in pidfile, let me try pushing it down to remove
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jrafanie
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Jun 30, 2017
| @@ -21,7 +21,7 @@ def pid | |||
| end | |||
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| def remove | |||
| FileUtils.rm(@fname) if File.file?(@fname) | |||
| FileUtils.rm(@fname) if pid == Process.pid | |||
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The pid method checks if the File exists... good idea @Fryguy
Fryguy
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https://bugzilla.redhat.com/show_bug.cgi?id=1464698 at_exit handlers created in the server process are inherited when the server forks workers. As soon as one of these workers exits, this at_exit was being run and removing the server's pidfile. This allowed a subsequent rake evm:start or systemctl start evmserverd to fail to detect an existing server process, allowing a second MIQ Server to start. We can workaround this by only removing a pidfile that matches my Process.pid.
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Checked commit jrafanie@9090b3e with ruby 2.2.6, rubocop 0.47.1, and haml-lint 0.20.0 |
simaishi
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…idfile Only remove my process' pidfile. (cherry picked from commit 8dff3ce) https://bugzilla.redhat.com/show_bug.cgi?id=1468612
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Euwe backport details: |
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…idfile Only remove my process' pidfile. (cherry picked from commit 8dff3ce) https://bugzilla.redhat.com/show_bug.cgi?id=1478434
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Fine backport details: |
simaishi
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…idfile Only remove my process' pidfile. (cherry picked from commit 8dff3ce) https://bugzilla.redhat.com/show_bug.cgi?id=1484485
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d-m-u
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…rocess_pidfile Only remove my process' pidfile. (cherry picked from commit 8dff3ce) https://bugzilla.redhat.com/show_bug.cgi?id=1478434
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https://bugzilla.redhat.com/show_bug.cgi?id=1464698
at_exit handlers created in the server process are inherited when the
server forks workers. As soon as one of these workers exits, this
at_exit was being run and removing the server's pidfile. This allowed a
subsequent rake evm:start or systemctl start evmserverd to fail to
detect an existing server process, allowing a second MIQ Server to
start.
We can workaround this by only removing a pidfile that matches my
Process.pid.