During Upgrade The Step 2 Reboot Message Fails to List All Cluster Nodes as Requiring OS Kernel Update and Reboot (Doc ID 2298371.1)

Last updated on SEPTEMBER 03, 2017

Applies to:

Big Data Appliance Integrated Software - Version 4.4.0 and later
Linux x86-64

Symptoms

During Mammoth upgrade the OS kernel may be updated if the kernel is changing between releases. In Mammoth upgrades where the OS kernel is updated, it must be updated on all cluster nodes. The Step 2 Mammoth upgrade should output a message like below, listing all cluster nodes as requiring reboot to finalize the kernel upgrade. 

WARNING: The OS kernel was updated on some nodes - so those nodes need to be rebooted
INFO: Nodes to be rebooted: bdanode01,bdanode02,...bdanode0n
Proceed with reboot? [y/n]: y

In the case of the error condition not all cluster nodes are slated for reboot. The symptoms are:

1. Not all cluster nodes are on the list for reboot. The message from the Mammoth upgrade shows some nodes will not be rebooted. The message will be something like below, where some combination of nodes is missing from the reboot list.

WARNING: The OS kernel was updated on some nodes - so those nodes need to be rebooted
INFO: Nodes to be rebooted: bdanode01,bdanode02
Proceed with reboot? [y/n]:

2. "Proceed with reboot? [y/n]" may be answered "y" or "n".

Case 1: Since not all nodes are present in the reboot list "n" may have been entered to not reboot.  In this case output will look like:

WARNING: The OS kernel was updated on some nodes - so those nodes need to be rebooted
INFO: Nodes to be rebooted: bdanode01
Proceed with reboot? [y/n]: n

INFO: Not rebooting
WARNING: You will have to reboot before you issue any further mammoth command

Or

Case 2: Even though not all nodes are present in the reboot list "y" may have been entered to reboot those on the list. In this case output will look like like below.  In the example here bdanode06 is missing from the reboot list.

WARNING: The OS kernel was updated on some nodes - so those nodes need to be rebooted
INFO: Nodes to be rebooted: bdanode01,bdanode02,bdanode03,bdanode04,bdanode05
Proceed with reboot? [y/n]: y

After reboot the kernel is only upgraded on the nodes listed for reboot, not on the node(s) missing from the list.

 

Cause

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