The automated reporting daemons and features provided by the Red Hat Automatic Bug Reporting Tool (ABRT) are not supported with Oracle Linux

ABRT packages and associated files, such as libreport, are included in the distribution to satisfy package dependencies and can be used to generate local bug reports but the features to automatically upload these reports are not supported. For technical assistance, contact Oracle Support by using the My Oracle Support portal or by telephone.

Pressing the Tab key to complete commands automatically in the bash shell works for some commands such as ls but not for other commands such as export. You can use the following workaround to enable autocompletion for all commands:

1. Remove the bash-completion package:

   sudo yum remove bash-completion

2. Run the complete -r command in the shell. To make this command persistent, you could put it in $HOME/.bashrc.

(Bug ID 19248362)

Mounting and formatting Ceph block devices is available as a technical preview with UEK R3. See the Oracle Linux: Ceph Release Notes at Oracle Linux 7 documentation. (Bug ID 20304006)

If you enable the crashkernel=auto kernel parameter for UEK R3 to simplify Kdump configuration, both dmesg output and /proc/cmdline show crashkernel=NNNM@0M. This is the expected behavior for the implementation, where @0M implies the auto setting. The crashkernel=auto parameter is not supported for Xen.

(Bug ID 17616874)

If RemoveIPC=yes is configured for systemd, interprocess communication (IPC) is terminated for a non-system user's processes when that user logs out. This setting, which is intended for laptops, can cause software problems on server systems. For example, if the user is a database software owner such as oracle for Oracle Database, this configuration can cause database installation to fail or database services to crash.

By default, Oracle Linux 7 Update 2 configures RemoveIPC=no in /etc/systemd/logind.conf to prevent systemd from terminating IPC. However, if you have touched this file before updating your system to Oracle Linux 7 Update 2, the update installs the new version of the file as /etc/systemd/logind.conf.rpmnew and does not set RemoveIPC=no in /etc/systemd/logind.conf. To avoid database crashes, set RemoveIPC=no in /etc/systemd/logind.conf and run systemctl reboot to reboot the system. (Bug ID 22224874)

Docker 1.8.3 can fail to start if SELinux is enabled. A workaround is to disable SELinux. To fix the issue without disabling SELinux, upgrade to docker-engine-1.8.3-1.0.2, which automatically pulls in docker-engine-selinux-1.8.3-1.0.2 as a dependency. (Bug ID 22258930)

The following error message indicates that IPv6 NAT is not currently supported by firewalld with UEK R3.

ERROR: ipv6 table 'nat' does not exist (or not enough permission to check)

(Bug ID 18504545)

If grubby is used to remove a kernel menu entry from the GRUB 2 configuration, the value of the default entry in /etc/grub2/grub.cfg is incorrect. The workaround is to set the value of GRUB_DEFAULT in /etc/default/grub to the correct entry and use grub2-mkconfig to recreate /etc/grub2/grub.cfg, or use yum or rpm to remove the kernel packages. (Bug ID 19192278)

Installing the tex-fonts-hebrew package fails unless you first install all texlive* packages. (Bug ID 19059949)

The following sections describe issues that might be encountered when using InfiniBand devices.

The following sections describe issues that might be encountered during installation.

The UEK R3 does not support the QAT driver that allows cryptographic capabilities to be offloaded to QuickAssist hardware.

For an Oracle Server X5-2 system booted using UEK R3 from iSCSI storage, the iSCSI Boot Firmware Table is not initialized with the iSCSI initiator IP address that has been configured in the UEFI BIOS. (Bug ID 22265721)

If you want to install MariaDB, you must deselect the MySQL repository. Otherwise, MySQL is installed even if you select only the MariaDB group. (Bug ID 22238684)

Running the multipath -ll command under UEK R3 produces messages such as the following:

zram0: No fc_host device for 'host'
zram0: No fc_host device for 'host'
zram0: No fc_remote_port device for 'rport--1:-1-0'

You can ignore these message as there is no effect on multipath functionality. You can prevent the messages from occurring by blocklisting the zram device in /etc/multipath.conf.

(Bug ID 20300644)

The Network Priority cgroup subsystem (net_prio) is not currently supported for use with UEK R3. Attempting to use the module with UEK R3 results in error messages such as the following:

modprobe: FATAL: Module netprio_cgroup not found
mount: special device cgroup does not exist.

(Bug ID 18966564)

The network connection icon might report an active network interface as being disconnected. This behavior is seen for the root user but not for other users. Command-line utilities such as ip link and ifconfig report the correct state. (Bug ID 19060089)

The following sections describe issues that might be encountered when using NFS.

The oracleasm script fails if SELinux is in Enforcing mode. The suggested workaround is to disable the SELInux policy module for Oracle ASM before running oracleasm:

sudo semodule -d oracleasm
sudo semodule -l | grep oracleasm

oracleasm      1.0.0   Disabled

(Bug ID 18513404)

Oracle Linux 7 guests are supported for both hardware virtualization (HVM) and hardware virtualization with paravirtual drivers (PVHVM) on Oracle VM 3. Oracle Linux 7 guests in a paravirtualized domain (PVM) on Oracle VM or other Xen-based hypervisors are not supported.

Oracle Linux 7 guests of any type are not supported on Oracle VM 2.

Per-CPU allocation fails when the kvm_intel module is loaded with UEK R3. Messages such as the following are logged:

kvm_intel: Could not allocate 48 bytes percpu data 
PERCPU: limit reached, disable warning 

There is no current workaround for UEK R3. (Bug ID 18459498)

The systemctl command supports the disable, enable, restart, start, status, and stop actions for services such as o2cb and oracleasm. To perform actions such as configure, invoke the /etc/init.d script for the service directly. (Bug IDs 18527520 and 18528039)

At boot time, systemd fails to load the autofs4 and ipv6 modules and errors such as the following are logged:

systemd[1]: Failed to insert module 'autofs4'
systemd[1]: Failed to insert module 'ipv6'

There is no current workaround for UEK R3. (Bug ID 18470449)

The following sections describe issues that might be encountered when upgrading from Oracle Linux 6 (_latest) to Oracle Linux 7 Update 2.

xfs_copy fails to copy a file system under UEK R3 if the device sector size is greater than 512 bytes. (Bug ID 19267663)

By default, Oracle Linux 7 in graphical (GUI) console mode treats the hardware power button as equivalent to the ACPI "Sleep" button, which puts the system into low-power sleep mode. This behavior is specific to Gnome desktop environment.

In previous Oracle Linux versions, the hardware power button initiated a system shutdown. To make Oracle Linux 7 do the same, create a file named /etc/dconf/db/local.d/01-shutdown-button with the following content:

[org/gnome/settings-daemon/plugins/power]
button-power='shutdown'

Then run the following command:

sudo dconf update

You must log out of the desktop environment and log back in for the new setting to take effect. (Bug ID 25597898)