[GitHub] [beam] damccorm opened a new issue, #21321: BigQueryIO.write() never emits successfully written records

[GitBox <gi...@apache.org>]

damccorm opened a new issue, #21321:
URL: https://github.com/apache/beam/issues/21321

   In the following code snippet the data gets successfully inserted into BigQuery. But the "getSuccessfulInserts" Transform never returns any data. No log is written.
   ```
   
   WriteResult writeResultCategory =
               categoryWithHeader
                       .apply("BQ Insert
   Category",
                               BigQueryIO.<CategoryWithHeader>write()
                      
                   .withCreateDisposition(CreateDisposition.CREATE_IF_NEEDED)
                          
               .withWriteDisposition(WriteDisposition.WRITE_APPEND)
                                    
     .withMethod(BigQueryIO.Write.Method.STREAMING_INSERTS)
                                       .withExtendedErrorInfo()
   
                                      .withFailedInsertRetryPolicy(InsertRetryPolicy.neverRetry())
     
                                    .useBeamSchema()
                                       .to(getTableReference(tableCategory))
   
                      );
   
   
    writeResultCategory
               .getSuccessfulInserts()
               .apply("Log
   successful inserts", ParDo.of(new DoFn<TableRow, Void>() {
                   @ProcessElement
         
            public void process(ProcessContext c) {
                       LOG.info("Successfully inserted
   Category: " + c.element());
                   }
               })); 
   ```
   
   The problematic code might be in
   ```
   
   org.apache.beam.sdk.io.gcp.bigquery.BatchedStreamingWrite.BatchAndInsertElements#finishBundle
   ```
   
   The successfulInserts are never emitted from here.
   
   Please compare this behaviour with the following method where the successfulInserts are emitted:
   ```
   
   org.apache.beam.sdk.io.gcp.bigquery.BatchedStreamingWrite.InsertBatchedElements#processElement
   ```
   
    
   
   Imported from Jira [BEAM-13464](https://issues.apache.org/jira/browse/BEAM-13464). Original Jira may contain additional context.
   Reported by: thokie.


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