[Webkit-unassigned] [Bug 178149] New: [GTK] Debug test bot ran out of semaphores

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=178149

            Bug ID: 178149
           Summary: [GTK] Debug test bot ran out of semaphores
           Product: WebKit
           Version: WebKit Local Build
          Hardware: Unspecified
                OS: Unspecified
            Status: NEW
          Severity: Normal
          Priority: P2
         Component: Tools / Tests
          Assignee: webkit-unassigned at lists.webkit.org
          Reporter: clopez at igalia.com
                CC: aperez at igalia.com, bugs-noreply at webkitgtk.org,
                    lforschler at apple.com

I have been debugging this: https://build.webkit.org/builders/GTK%20Linux%2064-bit%20Debug%20%28Tests%29/builds/1791/steps/layout-test/logs/stdio

It looks like the server ran out of disk space, but in reality there is plenty of free space available.

It seems it ran out of semaphores!!

$ strace -f /usr/sbin/apache2 -f "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/WebKitBuild/Debug/layout-test-results/httpd.conf" -C 'DocumentRoot "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/http/tests"' -c 'TypesConfig "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/http/conf/mime.types"' -c 'PHPINIDir "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/http/conf"' -c 'CustomLog "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/WebKitBuild/Debug/layout-test-results/access_log.txt" common' -c 'ErrorLog "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/WebKitBuild/Debug/layout-test-results/error_log.txt"' -c 'PidFile /tmp/WebKit/httpd.pid' -k start -c 'Alias /js-test-resources "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/resources"' -c 'Alias /media-resources "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/media"' -c 'Alias /modern-media-controls "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/../Source/WebCore/Modules/modern-media-controls"' -c 'Alias /resources/testharness.css "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/resources/testharness.css"' -c 'Alias /resources/testharness.js "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/resources/testharness.js"' -c 'Alias /resources/testharnessreport.js "/home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/resources/testharnessreport.js"' -C 'User "slave"' -C 'Listen 127.0.0.1:8000' -C 'Listen [::1]:8000' -C 'Listen 127.0.0.1:8080' -C 'Listen [::1]:8080' -C 'Listen 127.0.0.1:8443' -C 'Listen [::1]:8443' -c 'SSLCertificateFile /home/slave/webkitgtk/gtk-linux-64-debug-tests/build/LayoutTests/http/conf/webkit-httpd.pem'"" 2>&1 | grep ENOSPC
semget(IPC_PRIVATE, 1, IPC_CREAT|0600)  = -1 ENOSPC (No space left on device)


$ ipcs -s|wc -l
132

Fixed it by manually running:
$ ipcrm --all=sem


So I think we should run this command as part of the kill-old-process script on the bots


Related: https://www.liquidweb.com/kb/apache-error-semget-no-space-left-on-device/

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