Fixed in https://github.com/smarterclayton/origin-server/commit/2248cb9544d00dfa5cf740288297506f180e754b, will have a new fork ami today.

Will check this bug after having a new fork ami.

Check this bug on fork_ami_membership_origin_ui_73_765,can add member to domain with id parameter,but can not add member to domain with login parameter.

Result:
1.Can not add member to domain with login parameter
[wsun@dhcp-8-229 ~]$ curl -k -H 'Accept: application/xml' -u wsun+mem1:changeme https://ec2-54-234-254-66.compute-1.amazonaws.com/broker/rest/domains/wsunmemfork765/members -d role=view -d login="wsun+mem3" -X POST
<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>not_found</status>
  <type nil="true"></type>
  <data>
    <datum nil="true"></datum>
  </data>
  <messages>
    <message>
      <severity>error</severity>
      <text>The requested cloud user was not found.</text>
      <exit-code>1</exit-code>
      <field nil="true"></field>
    </message>
  </messages>
 
</response>

2.Can add member to domain with id parameter
[wsun@dhcp-8-229 ~]$ curl -k -H 'Accept: application/xml' -u wsun+mem1:changeme https://ec2-54-234-254-66.compute-1.amazonaws.com/broker/rest/domains/wsunmemfork765/members -d role=admin -d id=520aea2e421286619b000002 -X POST
<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <type>members</type>
  <data>
    <member>
      <type>user</type>
      <name>wsun+mem1</name>
      <id>520ae338421286ef7e000001</id>
      <role>admin</role>
      <explicit-role nil="true"></explicit-role>
      <from>
        <from>
          <type>owner</type>
          <role>admin</role>
        </from>
      </from>
      <owner>true</owner>
    </member>
   
    <member>
      <type>user</type>
      <name>wsun+mem3</name>
      <id>520aea2e421286619b000002</id>
      <role>admin</role>
      <explicit-role>admin</explicit-role>
      <owner>false</owner>
    </member>
  </data>
  <messages>
    <message>
      <severity>info</severity>
      <text>Added 1 member.</text>
      <exit-code>0</exit-code>
      <field nil="true"></field>
    </message>
  </messages>
  <version>1.6</version>
  
</response>

Tested this bug on devenv_3659,the bug still can be reproduced.

Try this with a user without '+' in the login attribute.  Probably a different bug if so.

Check this bug on devenv_3671.
Could add member successfully with a  user without '+' in the login attribute,but could not add member with a user with '+' in the login attribute.

Result:
[wsun@dhcp-8-229 ~]$ curl -k -H 'Accept: application/xml' -u wsun:changeme https://ec2-67-202-24-81.compute-1.amazonaws.com/broker/rest/domains/wsun3671/members -d role=view -d login=yujzhang -X POST

<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>ok</status>
  <type>members</type>
  <data>
    <member>
      <type>user</type>
      <name>wsun</name>
      <id>521186ad183b46471100003a</id>
      <role>admin</role>
      <explicit-role nil="true"></explicit-role>
      <from>
        <from>
          <type>owner</type>
          <role>admin</role>
        </from>
      </from>
      <owner>true</owner>
    </member>
    <member>
      <type>user</type>
      <name>yujzhang</name>
      <id>521186be183b46471100003c</id>
      <role>view</role>
      <explicit-role>view</explicit-role>
      <owner>false</owner>
    </member>
  </data>
  <messages>
    <message>
      <severity>info</severity>
      <text>Added 1 member.</text>
      <exit-code>0</exit-code>
      <field nil="true"></field>
    </message>
  </messages>
  <version>1.6</version>
  <api-version>1.6</api-version>
  <supported-api-versions>
    <supported-api-version>1.0</supported-api-version>
    <supported-api-version>1.1</supported-api-version>
    <supported-api-version>1.2</supported-api-version>
    <supported-api-version>1.3</supported-api-version>
    <supported-api-version>1.4</supported-api-version>
    <supported-api-version>1.5</supported-api-version>
    <supported-api-version>1.6</supported-api-version>
  </supported-api-versions>
</response>
[wsun@dhcp-8-229 ~]$ 
[wsun@dhcp-8-229 ~]$ curl -k -H 'Accept: application/xml' -u wsun:changeme https://ec2-67-202-24-81.compute-1.amazonaws.com/broker/rest/domains/wsun3671/members -d role=edit -d login=wsun+t1@redhat.com -X POST
<?xml version="1.0" encoding="UTF-8"?>
<response>
  <status>not_found</status>
  <type nil="true"></type>
  <data>
    <datum nil="true"></datum>
  </data>
  <messages>
    <message>
      <severity>error</severity>
      <text>The requested cloud user was not found.</text>
      <exit-code>1</exit-code>
      <field nil="true"></field>
    </message>
  </messages>
  <version>1.6</version>
  <api-version>1.6</api-version>
  <supported-api-versions>
    <supported-api-version>1.0</supported-api-version>
    <supported-api-version>1.1</supported-api-version>
    <supported-api-version>1.2</supported-api-version>
    <supported-api-version>1.3</supported-api-version>
    <supported-api-version>1.4</supported-api-version>
    <supported-api-version>1.5</supported-api-version>
    <supported-api-version>1.6</supported-api-version>
  </supported-api-versions>
</response>

The "+" is being encoded using URL encoding rules, which means it is turned into a space.  Use "%2B" from curl instead of "+" to try and submit those.

Commit pushed to master at https://github.com/openshift/origin-server

https://github.com/openshift/origin-server/commit/68f5ddf96b74a03175db3852e6405e8e8a92a9a5
Bug 995371 - Direct parameters to members were ignored

Members controller now accepts:
:members => [{:id, :role, :login}] as array of members
:member => {:id, :role, :login} as single member
:id, :role, :login => single member