tpm fetch fails with NPE

What steps will reproduce the problem?

1. take a deployment running Tungsten-Replicator 2.1.0 (installed with 
tungsten-installer) 
2. Attempt upgrading to 2.1.1, following steps from 
https://docs.continuent.com/wiki/display/TEDOC/Upgrading+Tungsten+Replicator 

What is the expected output?

same as reported by the docs

What do you see instead?
$ ./tools/tpm fetch --hosts=f1,f2,f3,f4 --user=tungsten 
--directory=~/installs/cookbook/ --verbose
DEBUG >> The command is set to CopyConfigCommand
DEBUG >> Search ifconfig for xx.xx.xx.xx
DEBUG >> Execute `if [ -d ~/installs/cookbook/ ]; then if [ -f 
~/installs/cookbook//.lock ]; then echo 0; else echo 1; fi else echo 1; fi`
DEBUG >> RC: 0, Result: 1, No Errors
DEBUG >> Execute `if [ -d ~/installs/cookbook//tungsten ]; then if [ -f 
~/installs/cookbook//tungsten/.lock ]; then echo 0; else echo 1; fi else echo 
1; fi`
DEBUG >> RC: 0, Result: 0, No Errors
INFO  >> Load the current config from tungsten@f1:~/installs/cookbook//tungsten
DEBUG >> Execute `~/installs/cookbook//tungsten/tools/tpm query config`
DEBUG >> RC: 0, Result: {
  "__system_defaults_will_be_overwritten__": {
    "hosts": {
      "__defaults__": {
        "host_name": "__defaults__"
      }
    }
  }
}, No Errors
DEBUG >> Search ifconfig for xx.xx.xx.xx
DEBUG >> Execute `if [ -d ~/installs/cookbook/ ]; then if [ -f 
~/installs/cookbook//.lock ]; then echo 0; else echo 1; fi else echo 1; fi` on 
f2 as tungsten
DEBUG >> RC: 0, Result: 1
DEBUG >> Execute `if [ -d ~/installs/cookbook//tungsten ]; then if [ -f 
~/installs/cookbook//tungsten/.lock ]; then echo 0; else echo 1; fi else echo 
1; fi` on f2 as tungsten
DEBUG >> RC: 0, Result: 0
INFO  >> Load the current config from tungsten@f2:~/installs/cookbook//tungsten
DEBUG >> Execute `~/installs/cookbook//tungsten/tools/tpm query config` on f2 
as tungsten
DEBUG >> RC: 0, Result: {
  "__system_defaults_will_be_overwritten__": {
    "hosts": {
      "__defaults__": {
        "host_name": "__defaults__"
      }
    }
  }
}
DEBUG >> Search ifconfig for xx.xx.xx.xx
DEBUG >> Execute `if [ -d ~/installs/cookbook/ ]; then if [ -f 
~/installs/cookbook//.lock ]; then echo 0; else echo 1; fi else echo 1; fi` on 
f3 as tungsten
DEBUG >> RC: 0, Result: 1
DEBUG >> Execute `if [ -d ~/installs/cookbook//tungsten ]; then if [ -f 
~/installs/cookbook//tungsten/.lock ]; then echo 0; else echo 1; fi else echo 
1; fi` on f3 as tungsten
DEBUG >> RC: 0, Result: 0
INFO  >> Load the current config from tungsten@f3:~/installs/cookbook//tungsten
DEBUG >> Execute `~/installs/cookbook//tungsten/tools/tpm query config` on f3 
as tungsten
DEBUG >> RC: 0, Result: {
  "__system_defaults_will_be_overwritten__": {
    "hosts": {
      "__defaults__": {
        "host_name": "__defaults__"
      }
    }
  }
}
DEBUG >> Search ifconfig for xx.xx.xx.xx
DEBUG >> Execute `if [ -d ~/installs/cookbook/ ]; then if [ -f 
~/installs/cookbook//.lock ]; then echo 0; else echo 1; fi else echo 1; fi` on 
f4 as tungsten
DEBUG >> RC: 0, Result: 1
DEBUG >> Execute `if [ -d ~/installs/cookbook//tungsten ]; then if [ -f 
~/installs/cookbook//tungsten/.lock ]; then echo 0; else echo 1; fi else echo 
1; fi` on f4 as tungsten
DEBUG >> RC: 0, Result: 0
INFO  >> Load the current config from tungsten@f4:~/installs/cookbook//tungsten
DEBUG >> Execute `~/installs/cookbook//tungsten/tools/tpm query config` on f4 
as tungsten
DEBUG >> RC: 0, Result: {
  "__system_defaults_will_be_overwritten__": {
    "hosts": {
      "__defaults__": {
        "host_name": "__defaults__"
      }
    }
  }
}
ERROR >> undefined method `each_key' for nil:NilClass
DEBUG >> undefined method `each_key' for nil:NilClass
./ruby-tpm/configure/modules/package_remote.rb:203:in `load_remote_config'
./ruby-tpm/configure/modules/package_remote.rb:63:in `parsed_options?'
./ruby-tpm/configure/modules/package_cluster.rb:91:in `parsed_options?'
./ruby-tpm/configure/configure_command.rb:870:in `parsed_options?'
./ruby-tpm/configure/commands/copy_config.rb:16:in `parsed_options?'
./ruby-tpm/configurator.rb:453:in `parsed_options?'
./ruby-tpm/configurator.rb:231:in `run'
ruby-tpm/configure.rb:31

What is the possible cause?

N/A

What is the proposed solution?

N/A
Additional information

The same error appears using both Ruby 1.8.7 (CentOS) and 1.9.3 (Ubuntu)
Original issue reported on code.google.com by g.maxia on 19 Aug 2013 at 1:03
danielcheng007 / tungsten-replicator

tpm fetch fails with NPE #674
