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Fedora 11 httpd: alloc_listener: failed to get a socket for (null)

If you use Fedora 11 in a virtualized environment, you may have seen this error recently if you’ve updated to apr-1.3.8-1:

The issue is related to three kernel calls that are used in apr-1.3.8-1: accept4(), dup3() and epoll_create1(). Without these calls, apache is unable to start.

Update on August 17, 2009: the Fedora team has pushed apr-1.3.8-2 into the stable repositories for Fedora 11, which eliminates the need for the temporary fix shown below.

Deprecated solution: There is a bug open with the Fedora team, and there is a temporary fix available:

#apache #emergency #fedora #kernel #yum