GitHub user wangyum opened a pull request:
https://github.com/apache/spark/pull/22372
[SPARK-25385][BUILD] Upgrade Hadoop 3.1 jackson version to 2.7.8
## What changes were proposed in this pull request?
Upgrade Hadoop 3.1 jackson version to 2.7.8 to fix `JsonMappingException:
Incompatible Jackson version: 2.7.8`.
https://github.com/apache/hadoop/blob/release-3.1.0-RC1/hadoop-project/pom.xml#L72
## How was this patch tested?
manual tests:
```sh
export SPARK_PREPEND_CLASSES=true
build/sbt clean package -Phadoop-3.1
spark-shell
scala> spark.range(10).write.mode("overwrite").parquet("/tmp/spark/parquet")
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/wangyum/spark SPARK-25385
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/22372.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 #22372
----
commit f68083ab07df6fedf8a30c94e706a74e0c620694
Author: Yuming Wang <yumwang@...>
Date: 2018-09-09T11:51:39Z
Upgrade jackson version to 2.7.8
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