[jira] [Created] (PARQUET-2185) ParquetReader constructed using builder fails to read encrypted files

["Atul Mohan (Jira)" <ji...@apache.org>]

Atul Mohan created PARQUET-2185:
-----------------------------------

             Summary: ParquetReader constructed using builder fails to read encrypted files
                 Key: PARQUET-2185
                 URL: https://issues.apache.org/jira/browse/PARQUET-2185
             Project: Parquet
          Issue Type: Bug
            Reporter: Atul Mohan


ParquetReader objects can be constructed using the builder as follows:

 
ParquetReader<Group> builderReader = ParquetReader.builder(new GroupReadSupport(),new Path("path/to/c000.snappy.parquet"))
.withConf(conf)
.build();
This parquetReader object cannot be used to read encrypted files as 
{noformat}
builderReader.read(){noformat}
 fails with the following exception:

 
{code:java}
java.lang.NullPointerException at org.apache.parquet.crypto.keytools.FileKeyUnwrapper.getKey(FileKeyUnwrapper.java:87)  {code}
It seems like the reason is that the _withConf_ method within the ParquetReader builder [clears the optionsBuilder set earlier|https://github.com/apache/parquet-mr/blob/master/parquet-hadoop/src/main/java/org/apache/parquet/hadoop/ParquetReader.java#L231].

Here is a sample test showcasing the issue: [https://gist.github.com/a2l007/3d813cc5e44c45100dda169dc6245ae4]



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