Github user gatorsmile commented on the issue:
https://github.com/apache/spark/pull/16281
The problem is the Parquet community will not create a branch 1.8.2+ for
us. Upgrading to newer versions 1.9 or 2.0 are always risky. Based on the
history, we hit the bugs and performance degradation, when we try to upgrade
the Parquet versions. We need more time and efforts to decide whether we need
to upgrade to the newer Parquet version.
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