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Description of problem: When upgrading the java-1.8.0-headless package, the file /usr/lib/jvm/jre/lib/net.properties is overwritten, even though it has network configuration information.

Version-Release number of selected component (if applicable):
Tested with upgrading from java-1.8.0-openjdk-headless-1.8.0.201.b09-2.el7_6.x86_64 to java-1.8.0-openjdk-headless-1.8.0.212.b04-0.el7_6.x86_64.

How reproducible: Consistent.


Steps to Reproduce:
1. Install java-1.8.0-openjdk-headless-1.8.0.201.b09-2.el7_6.x86_64 package.
2. Edit /usr/lib/jvm/jre/lib/net.properties to set java.net.useSystemProxies=true.
3. Upgrade java-1.8.0-openjdk-headless package.

Actual results:
Value of java.net.useSystemProxies in /usr/lib/jvm/jre/lib/net.properties is reset to false (the system default).

Expected results:
Value of java.net.useSystemProxies in /usr/lib/jvm/jre/lib/net.properties is preserved across package upgrades.

Additional info:

A pull request for this issue exists in Fedora: https://src.fedoraproject.org/rpms/java-1.8.0-openjdk/pull-request/72

Trivial fix that just needs bringing over from Fedora.

Just FYI - it is already in cjc: http://pkgs.devel.redhat.com/cgit/rpms/copy-jdk-configs/tree/copy_jdk_configs.lua?h=rhel-7.7#n11

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2020:1071