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Chapter 2. Behavioral differences between JBCS 2.4.51 distributions on different RHEL versions

Unlike JBCS 2.4.51 on RHEL 7 or RHEL 8, the JBCS 2.4.51 distribution for RHEL 9 systems is based on the RHEL distribution of the Apache HTTP Server httpd package.

Because of this difference between the JBCS 2.4.51 distributions for different RHEL versions, JBCS 2.4.51 on RHEL 9 has certain behavioral differences compared to JBCS 2.4.51 on earlier RHEL versions.

Consider the following guidelines:

  • On RHEL 9, the mod_security module does not support the SecCollectionGCFrequency directive for specifying garbage collection frequency. The mod_security module that JBCS provides on RHEL 7 and RHEL 8 supports the SecCollectionGCFrequency directive.
  • On RHEL 9, the mod_deflate module does not support the DeflateAlterEtag directive for specifying how to alter the ETag header when a response is compressed. The mod_deflate module that JBCS provides on RHEL 7 and RHEL 8 supports the DeflateAlterEtag directive.

  • On RHEL 9, the httpd.conf.sample file does not include the following content:

    • A default PidFile directive for specifying the file in which the server records the process ID of the daemon
    • A list of AddLanguage directives in the mod_mime section for mapping specific filename extensions to specific content languages
    • A configuration section for the web_dav module for web-based distributed authoring and versioning (WebDav)

    The httpd.conf.sample file that JBCS provides on RHEL 7 and RHEL 8 includes all of the preceding content.

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