## What changes were proposed in this pull request?
Our lint failed due to the following errors:
```
[INFO] --- scalastyle-maven-plugin:1.0.0:check (default) spark-ganglia-lgpl_2.11 ---
error file=/home/jenkins/workspace/spark-master-maven-snapshots/spark/external/spark-ganglia-lgpl/src/main/scala/org/apache/spark/metrics/sink/GangliaSink.scala message=
Are you sure that you want to use toUpperCase or toLowerCase without the root locale? In most cases, you
should use toUpperCase(Locale.ROOT) or toLowerCase(Locale.ROOT) instead.
If you must use toUpperCase or toLowerCase without the root locale, wrap the code block with
// scalastyle:off caselocale
.toUpperCase
.toLowerCase
// scalastyle:on caselocale
line=67 column=49
error file=/home/jenkins/workspace/spark-master-maven-snapshots/spark/external/spark-ganglia-lgpl/src/main/scala/org/apache/spark/metrics/sink/GangliaSink.scala message=
Are you sure that you want to use toUpperCase or toLowerCase without the root locale? In most cases, you
should use toUpperCase(Locale.ROOT) or toLowerCase(Locale.ROOT) instead.
If you must use toUpperCase or toLowerCase without the root locale, wrap the code block with
// scalastyle:off caselocale
.toUpperCase
.toLowerCase
// scalastyle:on caselocale
line=71 column=32
Saving to outputFile=/home/jenkins/workspace/spark-master-maven-snapshots/spark/external/spark-ganglia-lgpl/target/scalastyle-output.xml
```
See https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Compile/job/spark-master-lint/8890/
## How was this patch tested?
N/A
Closes#22647 from gatorsmile/fixLint.
Authored-by: gatorsmile <gatorsmile@gmail.com>
Signed-off-by: hyukjinkwon <gurwls223@apache.org>
## What changes were proposed in this pull request?
This patch is to bump the master branch version to 3.0.0-SNAPSHOT.
## How was this patch tested?
N/A
Closes#22606 from gatorsmile/bump3.0.
Authored-by: gatorsmile <gatorsmile@gmail.com>
Signed-off-by: gatorsmile <gatorsmile@gmail.com>
## What changes were proposed in this pull request?
In the dev list, we can still discuss whether the next version is 2.5.0 or 3.0.0. Let us first bump the master branch version to `2.5.0-SNAPSHOT`.
## How was this patch tested?
N/A
Closes#22426 from gatorsmile/bumpVersionMaster.
Authored-by: gatorsmile <gatorsmile@gmail.com>
Signed-off-by: gatorsmile <gatorsmile@gmail.com>
## What changes were proposed in this pull request?
This patch bumps the master branch version to `2.4.0-SNAPSHOT`.
## How was this patch tested?
N/A
Author: gatorsmile <gatorsmile@gmail.com>
Closes#20222 from gatorsmile/bump24.
## What changes were proposed in this pull request?
This patch bumps master branch version to 2.2.0-SNAPSHOT.
## How was this patch tested?
N/A
Author: Reynold Xin <rxin@databricks.com>
Closes#16126 from rxin/SPARK-18695.
The current ganglia reporter doesn't set metric expiration time (dmax). The metrics of all finished applications are indefinitely left displayed in ganglia web. The dmax parameter allows user to set the lifetime of the metrics. The default value is 0 for compatibility with previous versions.
Author: Ekasit Kijsipongse <ekasitk@gmail.com>
Closes#11127 from ekasitk/ganglia-dmax.
https://issues.apache.org/jira/browse/SPARK-16535
## What changes were proposed in this pull request?
When I scan through the pom.xml of sub projects, I found this warning as below and attached screenshot
```
Definition of groupId is redundant, because it's inherited from the parent
```
I've tried to remove some of the lines with groupId definition, and the build on my local machine is still ok.
```
<groupId>org.apache.spark</groupId>
```
As I just find now `<maven.version>3.3.9</maven.version>` is being used in Spark 2.x, and Maven-3 supports versionless parent elements: Maven 3 will remove the need to specify the parent version in sub modules. THIS is great (in Maven 3.1).
ref: http://stackoverflow.com/questions/3157240/maven-3-worth-it/3166762#3166762
## How was this patch tested?
I've tested by re-building the project, and build succeeded.
Author: Xin Ren <iamshrek@126.com>
Closes#14189 from keypointt/SPARK-16535.
## What changes were proposed in this pull request?
After SPARK-16476 (committed earlier today as #14128), we can finally bump the version number.
## How was this patch tested?
N/A
Author: Reynold Xin <rxin@databricks.com>
Closes#14130 from rxin/SPARK-16477.
## What changes were proposed in this pull request?
Move `docker` dirs out of top level into `external/`; move `extras/*` into `external/`
## How was this patch tested?
This is tested with Jenkins tests.
Author: Sean Owen <sowen@cloudera.com>
Closes#11523 from srowen/SPARK-13595.
