在用configtxgen tool创建创世区块时，报错：While parsing config: yaml: unknown anchor 'OrdererDefaults' referenced

在执行以下命令生成创世区块时，出现报错！

生成创世区块命令：

         ./bin/configtxgen -profile TwoOrgsOrdererGenesis -outputBlock ./genesis.block 

报错信息：

2019-05-31 16:24:31.914 CST [common.tools.configtxgen] main -> INFO 002 Loading configuration
2019-05-31 16:24:31.914 CST [common.tools.configtxgen.localconfig] Load -> PANI 003 Error reading configuration:  While parsing config: yaml: unknown anchor 'OrdererDefaults' referenced
2019-05-31 16:24:31.914 CST [common.tools.configtxgen] func1 -> PANI 004 Error reading configuration:  While parsing config: yaml: unknown anchor 'OrdererDefaults' referenced
panic: Error reading configuration:  While parsing config: yaml: unknown anchor 'OrdererDefaults' referenced [recovered]
panic: Error reading configuration:  While parsing config: yaml: unknown anchor 'OrdererDefaults' referenced

 在Stack Overflow找到解决方案：

In YAML all anchors ( those tokens starting with &) need to precede any references to them (using aliases, the tokens starting with *) in the file.

So in the root-level mapping you should put your key Profiles and its value after the key Organizations, Orderer and Application (and their values):

应该将configtx.yaml文件中Profiles的部分放置到最后，原因如上：

Organizations:
  - &Smartforce
    Name: smartforce
    ID: SmartforceMSP
    MSPDir: /home/falcon/iq-smartforce/crypto-config/ordererOrganizations/smartforce.io/msp

  - &BusinessPartner1
    Name: BusinessPartner1
    ID: FalconMSP
    MSPDir: /home/falcon/iq-smartforce/crypto-config/peerOrganizations/falcon.io/msp

  - &BusinessPartner2
    Name: BusinessPartner2
    ID: FrostMSP
    MSPDir: /home/frost/iq-smartforce/crypto-config/peerOrganizations/frost.io/msp

Orderer: &OrdererDefaults
  OrdererType: solo

  Addresses:
    - orderer.smartforce.io:7050

  BatchTimeout: 2s

  BatchSize:
    MaxMessageCount: 10
    AbsoluteMaxBytes: 99 MB
    PreferredMaxBytes: 512 KB

  Organizations:

Application: &ApplicationDefaults
  Organizations:

Profiles:
  TwoOrgOrdererGenesis:
    Orderer:
      <<: *OrdererDefaults
      Organizations:
        - *Smartforce

    Consortiums:
      SampleConsortium:
        Organizations:
          - *BusinessPartner1
          - *BusinessPartner2

  TwoOrgChannel:
    Consortium: SampleConsortium
    Application:
      <<: *ApplicationDefaults
      Organizations:
        - *BusinessPartner1
        - *BusinessPartner2