[GitHub] [hudi] zhedoubushishi commented on issue #1586: [SUPPORT] DMS with 2 key example

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

zhedoubushishi commented on issue #1586:
URL: https://github.com/apache/hudi/issues/1586#issuecomment-665856107


   I added a log print to checked the config read by JCommander:
   
   ```
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is hoodie.datasource.write.recordkey.field=f1
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is f2,,f3
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is hoodie.datasource.write.keygenerator.class=org.apache.hudi.keygen.ComplexKeyGenerator
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is hoodie.datasource.write.partitionpath.field=dt
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is hoodie.datasource.hive_sync.database=default
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is hoodie.datasource.hive_sync.table=hudi_table
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is hoodie.datasource.hive_sync.partition_fields=dt
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is hoodie.datasource.hive_sync.partition_extractor_class=org.apache.hudi.hive.MultiPartKeysValueExtractor
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is hoodie.deltastreamer.source.dfs.root=s3://hudi/data
   ```
   
   It shows that JCommander will automatically split the string by ",":
   ```
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is hoodie.datasource.write.recordkey.field=f1
   20/07/25 00:50:06 INFO HoodieDeltaStreamer: debug => config is f2,,f3
   ```
   That's why it unable to read multiple fields as record key.


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