CZuegner opened a new pull request, #2991:
URL: https://github.com/apache/parquet-java/pull/2991

   Instead of log the unsupported call check capabilities and call only on 
supported filesystems - e.g. S3A does not.
   
   ### Rationale for this change
   When stream into an HadoopOutputFile on S3A a waring gets logged: 
Application invoked the Syncable API against stream writing to XXX. This is 
Unsupported
   
https://hadoop.apache.org/docs/current/hadoop-aws/tools/hadoop-aws/troubleshooting_s3a.html#UnsupportedOperationException_.E2.80.9CS3A_streams_are_not_Syncable._See_HADOOP-17597..E2.80.9D
   
   ### What changes are included in this PR?
   Instead of log the unsupported call (hflush() and hsync()) check 
capabilities and call only on supported filesystems - whereas S3A is not.
   
   ### Are these changes tested?
   Yes
   
   ### Are there any user-facing changes?
   No


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