undefined method `chomp' for nil:NilClass

[ahwanghwa]

Hello everyone,

We use net-ssh 3.1.1 and ruby 2.1.5.
We run ruby rake task as a scheduled job every other hour and sometimes get the following error:

22:31:25 NoMethodError: undefined method `chomp' for nil:NilClass
22:31:25 /apps/amex-data-processor/shared/bundle/ruby/2.1.0/gems/net-ssh-3.1.1/lib/net/ssh/prompt.rb:73:in 'prompt'
22:31:25 /apps/amex-data-processor/shared/bundle/ruby/2.1.0/gems/net-ssh-3.1.1/lib/net/ssh/authentication/methods/password.rb:57:in 'ask_password'
22:31:25 /apps/amex-data-processor/shared/bundle/ruby/2.1.0/gems/net-ssh-3.1.1/lib/net/ssh/authentication/methods/password.rb:22:in 'authenticate'
22:31:25 /apps/amex-data-processor/shared/bundle/ruby/2.1.0/gems/net-ssh-3.1.1/lib/net/ssh/authentication/session.rb:79:in 'block in authenticate'
22:31:25 /apps/amex-data-processor/shared/bundle/ruby/2.1.0/gems/net-ssh-3.1.1/lib/net/ssh/authentication/session.rb:66:in 'each'
22:31:25 /apps/amex-data-processor/shared/bundle/ruby/2.1.0/gems/net-ssh-3.1.1/lib/net/ssh/authentication/session.rb:66:in 'authenticate'
22:31:25 /apps/amex-data-processor/shared/bundle/ruby/2.1.0/gems/net-ssh-3.1.1/lib/net/ssh.rb:233:in 'start'
22:31:25 /apps/amex-data-processor/shared/bundle/ruby/2.1.0/gems/net-sftp-2.1.2/lib/net/sftp.rb:31:in 'start'
22:31:25 /apps/amex-data-processor/releases/20160824215913/lib/amex_data_processing.rb:7:in 'run'
22:31:25 /apps/amex-data-processor/releases/20160824215913/lib/tasks/amex_disputes.rake:5:in 'block (2 levels) in <top (required)>'

Our code looks like the following:

Net::SFTP.start(AMEX_SFTP_CONFIG[:host], AMEX_SFTP_CONFIG[:user], password: AMEX_SFTP_CONFIG[:password]) do |sftp|
      sftp.dir.foreach(AMEX_SFTP_CONFIG[:directory]) do |entry|
        next unless entry.longname =~ /CBNOT#/
        sftp_file_names << entry.name
      end

      file_names = sftp_file_names - processed_file_names

      file_names.each { |name| sftp.download!("#{AMEX_SFTP_CONFIG[:directory]}/#{name}", "/tmp/#{name}") }
end

The issue seems to be very similar to: #234, #424
Could you please help with the issue?

[mfazekas]

This indicates that the password was not accepted an it tried to prompt but there seems to be no $stdin. Since this is a non interactive usecase please pass non_interactive: true

[baelter]

ok @mfazekas, but maybe you should catch and re raise?

[mfazekas]

@baelter yes, right. feel free to submit a patch that checks if $stdin is nil and raises a more descriptive error.