Github user HyukjinKwon commented on the issue:
https://github.com/apache/spark/pull/12355
It seems working fine now. Therefore, it seems not a problem.
```scala
test("SPARK-14344 - write metadata")
withSQLConf(ParquetOutputFormat.ENABLE_JOB_SUMMARY -> "true") {
withTempPath { dir =>
val path = s"${dir.getCanonicalPath}/part-r-0.parquet"
spark.range(10).write.parquet(path)
val compressedFiles = new File(path).listFiles()
assert(compressedFiles.exists(_.getName.endsWith("_common_metadata")))
}
}
withSQLConf(ParquetOutputFormat.ENABLE_JOB_SUMMARY -> "false") {
withTempPath { dir =>
val path = s"${dir.getCanonicalPath}/part-r-0.parquet"
spark.range(10).write.parquet(path)
val compressedFiles = new File(path).listFiles()
assert(!compressedFiles.exists(_.getName.endsWith("_common_metadata")))
}
}
}
```
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