What to do if there is no coredump file in php

The solution to the problem that php does not have a coredump file: 1. Check whether there is a "ulimit -c 0" operation in the shell configuration; 2. Enable global coredump; 3. Exit and log in to the shell again, and modify the configuration.

The operating environment of this article: ubuntu 16.04 system, PHP7.1 version, DELL G3 computer

php What should I do if there is no coredump file? How to check the errors of php-fpm core dump file?

Enable PHP's coredump output and modify ulimit -c. However, in many cases, it will prompt that the rights are restricted and cannot be modified.

[fukun@10.16.29.xxx]$ ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 30678 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 32768 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 10240 cpu time (seconds, -t) unlimited max user processes (-u) 1024 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited $ ulimit -c unlimited -bash: ulimit: core file size: cannot modify limit: Operation not permitted

Solution:

1 .Check the configuration

See if there is a similar shutdown operation like ulimit -c 0 in the shell configuration, such as

$HOME/.bash_profile 或者 $HOME/.bashrc 之类的，如果有，注释掉。 # # Do not produce core dumps # # ulimit -c 0

2. Turn on global coredump

Use the root user , modify /etc/security/limits.conf

# /etc/security/limits.conf # # Each line describes a limit for a user in the form: # #     # * soft core unlimited

3. Exit and log in to the shell again, modify the configuration

ssh fukun@10.16.29.xxx [fukun@10.16.29.xxx]$ ulimit -c 0

First switch to the root user for settings

su - ulimit -c unlimited ulimit -c unlimited

and then switch Go back to your own user to set it up

su - fukun ulimit -c unlimited ulimit -c unlimited

The above three steps may not be necessary, but as long as you follow this step, you will definitely be able to set it up successfully. If other methods fail to set up, try this step out. .

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