GitHub user JeroenWarmerdam opened a pull request:
https://github.com/apache/spark/pull/4646
Fixed overflow on large range with high number of partitions
The following use case causes an overflow when creating the partitions
inside JdbcRDD:
```
val jdbcRDD = new TJdbcRDD(sc, () =>
DriverManager.getConnection(url, username, password),
"SELECT id FROM twitter_statuses WHERE ? <= id AND id <= ?",
lowerBound = 1131544775L,
upperBound = 567279358897692673L,
numPartitions = 20,
mapRow = r => (r.getLong("id"))
)
```
This is fixed by swapping division and multiplication in the creation of
partitions.
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/JeroenWarmerdam/spark master
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/4646.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 #4646
----
commit 53f3a67b08c3e980c9dca0eb56fcb5094c8ff7d9
Author: Jeroen Warmerdam <jwarmer...@agtinternational.com>
Date: 2015-02-17T09:21:55Z
Fixed overflow on large range with high number of partitions
----
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