satellite-installer is failing with traceback rolling_file.rb:368:in `block in roll_by_number': undefined method `[]' for nil:NilClass (NoMethodError)

Environment

• Satellite 6

Issue

• During the upgrade, satellite-installer is failing with following traceback:

# satellite-installer --scenario satellite --upgrade
/usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:368:in `block in roll_by_number': undefined method `[]' for nil:NilClass (NoMethodError)
        from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:367:in `sort'
        from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:367:in `roll_by_number'
        from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:349:in `roll_files'
        from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:110:in `initialize'
        from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:6:in `new'
        from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:6:in `rolling_file'
        from /usr/share/gems/gems/kafo-2.1.0/lib/kafo/logger.rb:57:in `setup'
        from /usr/share/gems/gems/kafo-2.1.0/lib/kafo/kafo_configure.rb:96:in `initialize'
        from /usr/share/gems/gems/clamp-1.1.2/lib/clamp/command.rb:132:in `new'
        from /usr/share/gems/gems/clamp-1.1.2/lib/clamp/command.rb:132:in `run'
        from /usr/share/gems/gems/kafo-2.1.0/lib/kafo/kafo_configure.rb:163:in `run'
        from /sbin/satellite-installer:8:in `<main>'

Its not limited only to --upgrade, any satellite-installer command is failing with same traceback:

# satellite-installer
/usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:368:in `block in roll_by_number': undefined method `[]' for nil:NilClass (NoMethodError)
	from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:367:in `sort'
	from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:367:in `roll_by_number'
	from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:349:in `roll_files'
	from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:110:in `initialize'
	from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:6:in `new'
	from /usr/share/gems/gems/logging-2.2.2/lib/logging/appenders/rolling_file.rb:6:in `rolling_file'
	from /usr/share/gems/gems/kafo-2.1.0/lib/kafo/logger.rb:57:in `setup'
	from /usr/share/gems/gems/kafo-2.1.0/lib/kafo/kafo_configure.rb:96:in `initialize'
	from /usr/share/gems/gems/clamp-1.1.2/lib/clamp/command.rb:132:in `new'
	from /usr/share/gems/gems/clamp-1.1.2/lib/clamp/command.rb:132:in `run'
	from /usr/share/gems/gems/kafo-2.1.0/lib/kafo/kafo_configure.rb:163:in `run'
	from /usr/sbin/satellite-installer:8:in `<main>'

Resolution

• Move any file with name satellite.log-$something-$date-$.log or satellite.log-$something-$date-1.log from /var/log/foreman-installer/ directory.

For more KB articles/solutions related to Red Hat Satellite 6.x Installation/Upgrade/Update Issues, please refer to the Red Hat Satellite Consolidated Troubleshooting Article for Red Hat Satellite 6.x Installation/Upgrade/Update Issues.

Root Cause

In this particular case it was failing with back trace due to /var/log/foreman-installer/satellite.log-rename-20171205-1.log

Diagnostic Steps

Check files in directory /var/log/foreman-installer/, if there is any file which would match following mask, remove them:
satellite.log-$something-$date or satellite.log-$something-$date-1

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