GitHub user liancheng opened a pull request:
https://github.com/apache/spark/pull/4768
[SPARK-6010] [SQL] Merging compatible Parquet schemas before computing
splits
`ReadContext.init` calls `InitContext.getMergedKeyValueMetadata`, which
doesn't know how to merge conflicting user defined key-value metadata and
throws exception. In our case, when dealing with different but compatible
schemas, we have different Spark SQL schema JSON strings in different Parquet
part-files, thus causes this problem. Reading similar Parquet files generated
by Hive doesn't suffer from this issue.
In this PR, we manually merge the schemas before passing it to
`ReadContext` to avoid the exception.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/liancheng/spark spark-6010
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/4768.patch
To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:
This closes #4768
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commit 9002f0a3b631474f8bff23c70a854064fe3e3fda
Author: Cheng Lian <[email protected]>
Date: 2015-02-25T17:20:35Z
Fixes SPARK-6010
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