GitHub user lgrcyanny opened a pull request:
https://github.com/apache/spark/pull/19079
[SPARK-21859][CORE] Fix SparkFiles.get failed on driver in yarn-cluster and
yarn-client mode
## What changes were proposed in this pull request?
when use SparkFiles.get a file on driver in yarn-client or yarn-cluster, it
will report file not found exception.
This exception only happens on driver, SparkFiles.get on executor works
fine.
we can reproduce the bug as follows:
```scala
val conf = new SparkConf().setAppName("SparkFilesTest")
val sc = new SparkContext(conf)
def testOnDriver(fileName: String) = {
val file = new File(SparkFiles.get(fileName))
if (!file.exists()) {
println(s"$file not exist")
} else {
// print file content on driver
val content = Source.fromFile(file).getLines().mkString("\n")
println(s"File content: ${content}")
}
}
// the output will be file not exist
```
```python
conf = SparkConf().setAppName("test files")
sc = SparkContext(appName="spark files test")
def test_on_driver(filename):
file = SparkFiles.get(filename)
print("file path: {}".format(file))
if os.path.exists(file):
with open(file) as f:
lines = f.readlines()
print(lines)
else:
print("file doesn't exist")
run_command("ls .")
```
the output will be file not exist
## How was this patch tested?
tested in integration tests and manual tests
submit the demo case in yarn-cluster and yarn-client mode, and verify the
test result
the testing commands are:
```
./bin/spark-submit --master yarn-cluster --files README.md --class
"testing.SparkFilesTest" testing.jar
./bin/spark-submit --master yarn-client --files README.md --class
"testing.SparkFilesTest" testing.jar
./bin/spark-submit --master yarn-cluster --files README.md test_get_files.py
./bin/spark-submit --master yarn-client --files README.md test_get_files.py
```
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/lgrcyanny/spark fix-yarn-files-problem
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/spark/pull/19079.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 #19079
----
commit 3f0e4a88bdb7156b5db7cfb56cd079d4b0de3a5b
Author: lgrcyanny <[email protected]>
Date: 2017-05-07T12:51:55Z
[SPARK-21859][CORE] Fix SparkFiles.get failed on driver in yarn-cluster and
yarn-client mode
when use SparkFiles.get a file on driver in yarn-client or yarn-cluster, it
will report file not found exception.
This exception only happens on driver, SparkFiles.get on executor works
fine.
we can reproduce the bug as follows:
```scala
val conf = new SparkConf().setAppName("SparkFilesTest")
val sc = new SparkContext(conf)
def testOnDriver(fileName: String) = {
val file = new File(SparkFiles.get(fileName))
if (!file.exists()) {
println(s"$file not exist")
} else {
// print file content on driver
val content = Source.fromFile(file).getLines().mkString("\n")
println(s"File content: ${content}")
}
}
// the output will be file not exist
```
```python
conf = SparkConf().setAppName("test files")
sc = SparkContext(appName="spark files test")
def test_on_driver(filename):
file = SparkFiles.get(filename)
print("file path: {}".format(file))
if os.path.exists(file):
with open(file) as f:
lines = f.readlines()
print(lines)
else:
print("file doesn't exist")
run_command("ls .")
```
the output will be file not exist
tested in integration tests and manual tests
submit the demo case in yarn-cluster and yarn-client mode, and verify the
test result
```
./bin/spark-submit --master yarn-cluster --files README.md --class
"testing.SparkFilesTest" testing.jar
./bin/spark-submit --master yarn-client --files README.md --class
"testing.SparkFilesTest" testing.jar
./bin/spark-submit --master yarn-cluster --files README.md test_get_files.py
./bin/spark-submit --master yarn-client --files README.md test_get_files.py
```
Change-Id: I22034f99f571a451b862c1806b7f9350c6133c95
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