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litespeed_wiki:php:503-errors [2018/08/01 18:40] Jackson Zhang [Strace the PHP process] |
litespeed_wiki:php:503-errors [2018/08/10 13:41] Jackson Zhang [Magento 503 error] |
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| ==== Magento 503 error ==== | ==== Magento 503 error ==== | ||
| - | After (re)installation of LiteMage Cache extension in Magento Connect manager, Magento site couldn't be accessed and may give 503 errors. Please refer [[litespeed_wiki:cache:litemage:troubleshooting:connect-cache-session-cleaning-error|this]] for details. | + | After (re)installation of LiteMage Cache extension in Magento Connect manager or enable other modules in Magento 2, Magento site may be placed in maintenancence mode and couldn't be accessed and may give 503 errors. Please refer [[litespeed_wiki:cache:litemage:troubleshooting:connect-cache-session-cleaning-error|this]] for details. |
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| strace -tt -T -f -p 791228 | strace -tt -T -f -p 791228 | ||
| - | Sometimes, it may not be easily to get pid since the PHP may run very quick. In this case, you can try to strace **parent pid**, but the disadvantage of stracing parent pid is you may get too much-unrelated information in strace log and not easily to locate the problem pattern. | + | Sometimes, it may not be easy to get the ''pid'' since the PHP may run very quickly. In this case, you can try to strace the //parent pid//, but the disadvantage of stracing the parent pid is that you may get too much unrelated information in strace log. That would make it difficult to locate the problem pattern. |
| - | Alternatively, using a script to catch the pid. It depend on which SuEXEC user your PHP will be running and which script will be running ( such as index.php etc). | + | One solution is to use a script to catch the pid. It depends on which SuEXEC user your PHP will be running and which script will be running ( such as index.php etc). |
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| while true; do if mypid=`ps aux | grep $USERNAME | grep lsphp | grep $SCRIPTNAME | grep -v grep | awk '{print $2; }' | tail -1`; then strace -tt -T -f -p $mypid; fi ; done | while true; do if mypid=`ps aux | grep $USERNAME | grep lsphp | grep $SCRIPTNAME | grep -v grep | awk '{print $2; }' | tail -1`; then strace -tt -T -f -p $mypid; fi ; done | ||
| - | **Note**: **$USERNAME** should be replaced by real username; **$SCRIPTNAME** should be replaced by the script name running, such as index.php or other scripts | + | **Note**: ''$USERNAME'' should be replaced with a real username; ''$SCRIPTNAME'' should be replaced by the name of the script that is running, such as ''index.php'' or other scripts. |
| ==== Enable Core Dump ==== | ==== Enable Core Dump ==== | ||