Agent host not coming up because of blank label on the partition disk - Known Error

Agent host not coming up because of blank label on the partition disk Description Agent host not coming up because of blank label on the partition disk nil values of items in file_systems.rb is causing scripts to fail with parse error, hence host does not come up.

1. The error is in file_systems.rb script E, [2021-07-23T04:06:54.708535 #4972] ERROR -- : There was an issue getting command result E, [2021-07-23T04:06:54.708611 #4972] ERROR -- : C:/ProgramData/ServiceNow/agent-client-collector/cache/acc-visibility-modules-windows/bin/file_systems_new.rb:127:in `populate_file_systems_json': undefined method `[]' for nil:NilClass (NoMethodError) from C:/ProgramData/ServiceNow/agent-client-collector/cache/acc-visibility-modules-windows/bin/file_systems_new.rb:237:in ` '

2.. More precisely due to file_system_element_json["name"] = drive_letter.empty? ? label : drive_letter[0]

3.. Running following on powershell, we see agent host had an empty drive letter: GET_MSFT_VOLUME = 'powershell "get-wmiObject MSFT_Volume -Namespace root/Microsoft/Windows/Storage | SELECT SizeRemaining,Size,FileSystemLabel,FileSystem,DriveType,DriveLetter | format-list"'

4. Which leads to the previous error since we are calling .empty? on a null variable

Steps to Reproduce

1)Login to instance : 2)Check Agent Table 3)The host field is empty. The host fails to come up, even after running collect host data.

Check ECC QUEUE: The error which will come in the logs is:

"output" : "C:/Program Files/ServiceNow/agent-client-collector/embedded/lib/ruby/gems/2.7.0/gems/json-2.3.0/lib/json/common.rb:156:in `parse': 783: unexpected token at '' (JSON::ParserError)\r\n\tfrom C:/Program Files/ServiceNow/agent-client-collector/embedded/lib/ruby/gems/2.7.0/gems/json-2.3.0/lib/json/common.rb:156:in `parse'\r\n\tfrom C:/ProgramData/ServiceNow/agent-client-collector/cache/acc-f-commons/bin/endpoint_discovery.rb:179:in `block in &lt;main&gt;'\r\n\tfrom C:/ProgramData/ServiceNow/agent-client-collector/cache/acc-f-commons/bin/endpoint_discovery.rb:166:in `each'\r\n\tfrom C:/ProgramData/ServiceNow/agent-client-collector/cache/acc-f-commons/bin/endpoint_discovery.rb:166:in `&lt;main&gt;'\r\n",

Workaround Nil values of items in file_systems.rb is causing scripts to fail with parse error, hence host does not come up. Have added nil check for these variables.

The changes has to be made in file_systems.rb for windows: Location :

C:\ProgramData\ServiceNow\agent-client-collector\cache\acc-visibility-modules-windows\bin\file_systems.rb

Add null and empty checks for: Line 113 if label.empty? change it to if (label.nil? || label.empty?)

It is fixed in ACC-V 1.2 (July release) and future releases.