object cache causes segfault in network/sites.php

  • Resolved ChrisJDean

    (@chrisjdean)


    4 years, 12 months ago

    Potential bug report:

    Using nginx and php-fpm 7.2.28, wp 5.3.2 and twentytwenty theme

    site setup as subdomain multisite with twentytwenty theme network enabled.

    install and enable w3tc 0.13.1

    Database cache, fragment cache on and caching to redis – works fine

    Turn on object cache (caching to redis) with default options and network/sites.php causes a ram leak or segfault and 502’s as a result

    Turn on wp-admin cachng in object cache and network/sites.php works again.

    • This topic was modified 4 years, 12 months ago by ChrisJDean.
    • This topic was modified 4 years, 12 months ago by ChrisJDean.
    • This topic was modified 4 years, 12 months ago by ChrisJDean.
    • This topic was modified 4 years, 12 months ago by ChrisJDean.
Viewing 5 replies - 1 through 5 (of 5 total)
  • Plugin Contributor Marko Vasiljevic

    (@vmarko)

    Hello @chrisjdean

    I am sorry about the issue you are experiencing and I am happy to assist you with this.
    When you say:

    Turn on wp-admin caching in object cache and network/sites.php works again.

    What exactly do you mean by that?
    Redis segfault indicates invalid memory access that crashes Redis.
    This means that you need to check your Redis configuration. Please check this documentation for Redis debugging and this example.
    Thank you!

    Thread Starter ChrisJDean

    (@chrisjdean)

    Hi Marko, thanks for the reply.

    It not a redis segfault, it’s a php segfault (mentioning redis is just to give you info).

    Basically the segfault occurs on the network/sites.php page if object caching for wp-admin requests is OFF.

    If I turn caching for wp-admin requests on, the page loads correctly.

    Chris

    Plugin Contributor Marko Vasiljevic

    (@vmarko)

    Hello @chrisjdean

    Thank you for the info.
    Is the option “Use single network configuration file for all sites.” in Performance>General Settings Tab>Miscellaneous section enabled?
    Thanks!

    Thread Starter ChrisJDean

    (@chrisjdean)

    It is

    Plugin Contributor Marko Vasiljevic

    (@vmarko)

    Hello @chrisjdean

    Thank you for the information.
    If you disable “Use single network configuration file for all sites.” option and use separate configs does the issue persists?
    Thanks!

Viewing 5 replies - 1 through 5 (of 5 total)
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