kennknowles opened a new issue, #19264:
URL: https://github.com/apache/beam/issues/19264

   We observed this on apache_beam.examples.wordcount with Dataflow runner.
   
   The graph for this wordcount job contains two steps with the same name 
"write/Write/WriteImpl/FinalizeWrite/MapToVoidKey1".
   
   ```
   
   
   ...
    {
           "kind": "PAR_DO_KIND",
           "id": "s41",
           "name": "write/Write/WriteImpl/FinalizeWrite/MapToVoidKey1",
   
          "displayData": [
             {
               "key": "fn",
               "namespace": "apache_beam.transforms.core.ParDo",
   
              "strValue": "apache_beam.transforms.core.CallableWrapperDoFn",
               "shortStrValue":
   "CallableWrapperDoFn",
               "label": "Transform Function"
             },
             {
        
         "key": "fn",
               "namespace": "apache_beam.transforms.core.CallableWrapperDoFn",
     
            "strValue": "\u003clambda\u003e",
               "label": "Transform Function"
             }
   
          ],
           "outputCollectionName": [
             "write/Write/WriteImpl/FinalizeWrite/MapToVoidKey1.out0"
   
          ],
           "inputCollectionName": [
             "write/Write/WriteImpl/Extract.out0"
         
    ]
         },
   ...
   {
           "kind": "PAR_DO_KIND",
           "id": "s31",
           "name": "write/Write/WriteImpl/FinalizeWrite/MapToVoidKey1",
   
          "displayData": [
             {
               "key": "fn",
               "namespace": "apache_beam.transforms.core.ParDo",
   
              "strValue": "apache_beam.transforms.core.CallableWrapperDoFn",
               "shortStrValue":
   "CallableWrapperDoFn",
               "label": "Transform Function"
             },
             {
        
         "key": "fn",
               "namespace": "apache_beam.transforms.core.CallableWrapperDoFn",
     
            "strValue": "\u003clambda\u003e",
               "label": "Transform Function"
             }
   
          ],
           "outputCollectionName": [
             "write/Write/WriteImpl/FinalizeWrite/MapToVoidKey1.out0"
   
          ],
           "inputCollectionName": [
             "write/Write/WriteImpl/Extract.out0"
         
    ]
         },
   ...
   
   
   ```
   
   
   CC: [~foegler] [~altay] [~robertwb]
   
   Imported from Jira 
[BEAM-6584](https://issues.apache.org/jira/browse/BEAM-6584). Original Jira may 
contain additional context.
   Reported by: tvalentyn.


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