How To Upgrade a Kernel on BDA V4.2 and Higher/V4.1
Last updated on FEBRUARY 12, 2018
Applies to:Big Data Appliance Integrated Software - Version 4.2.0 and later
Detail how to upgrade the Kernel on BDA V4.2 and higher and BDA V4.1. The only difference between the BDA V4.2 and higher versions and BDA V4.1 is that on BDA V4.2 and higher 'reset-grub-conf' is on the BDA. On BDA V4.1 download the attached BDA V4.2-4.4 'reset-grub-conf' to any staging directory on the BDA and execute it from there.
Note: This important information for UEK4 Kernels:
1. BDA now supports UEK4QU6 on all BDA UEK4 versions. The recommendation for UEK4 kernel upgrades is to upgrade to the latest UEK4QU6 in public yum.
2. For BDA V4.7.0-4.9.0 going to a UEK4 QU5 kernel is NOT supported. For BDA V4.10.0 and V4.11.0 UEK4 QU5 (4.1.2-103*) is supported. But the recommendation is to upgrade to UEK4QU6 on UEK4.
3. There is a known issue on OL6 with UEK4 kernels higher than UEK 4.1.12-76 and lower than UEK 4.1.12-94.3.9 such that a network restart ("service network restart") causes a crash and a node reboot. Please do not upgrade to a UEK4 kernel lower than UEK 4.1.12-94.3.9 - see also DocID 2296538.1 Recommended Kernel and Firmware Versions After Upgrade to BDA V4.7, BDA V4.8, BDA V4.9.
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