IBM HTTP Server error log messages

Table of contents

Messages and resolutions

Cross-platform messages

Windows-specific messages

z/OS-specific messages

mod_auth_saf
mod_ldap and mod_auth_ldap

Linux-specific messages

Messages from third-party modules

Contact the supplier of any third-party modules in the configuration in order to address these messages.

fork() failures

Several web server functions depend on the fork() system call to create a new process. Specific requests can fail or web server performance can be degraded if this system call fails.

The specific cause for failure is usually one of the following:

More information may be available in the operating system documentation for the fork() subroutine.

AIX

The AIX documentation for fork() is http://publib16.boulder.ibm.com/doc_link/en_US/a_doc_lib/libs/basetrf1/fork.htm. The applicable limit is maxuproc. The following commands show how to display the current value and set it to a new value:

# lsattr -El sys0 -a maxuproc
maxuproc 2048 Maximum number of PROCESSES allowed per user True
# chdev -l sys0 -a maxuproc=4096
sys0 changed