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new 8503aa3 [SPARK-26646][TEST][PYSPARK] Fix flaky test:
pyspark.mllib.tests.test_streaming_algorithms
StreamingLogisticRegressionWithSGDTests.test_training_and_prediction
8503aa3 is described below
commit 8503aa300708fd8367c665e45d317c6ba4214ab2
Author: Liang-Chi Hsieh <vii...@gmail.com>
AuthorDate: Fri Jan 18 23:53:11 2019 +0800
[SPARK-26646][TEST][PYSPARK] Fix flaky test:
pyspark.mllib.tests.test_streaming_algorithms
StreamingLogisticRegressionWithSGDTests.test_training_and_prediction
## What changes were proposed in this pull request?
The test pyspark.mllib.tests.test_streaming_algorithms
StreamingLogisticRegressionWithSGDTests.test_training_and_prediction looks
sometimes flaky.
```
======================================================================
FAIL: test_training_and_prediction
(pyspark.mllib.tests.test_streaming_algorithms.StreamingLogisticRegressionWithSGDTests)
Test that the model improves on toy data with no. of batches
----------------------------------------------------------------------
Traceback (most recent call last):
File
"/home/jenkins/workspace/SparkPullRequestBuilder/python/pyspark/mllib/tests/test_streaming_algorithms.py",
line 367, in test_training_and_prediction
self._eventually(condition, timeout=60.0)
File
"/home/jenkins/workspace/SparkPullRequestBuilder/python/pyspark/mllib/tests/test_streaming_algorithms.py",
line 69, in _eventually
lastValue = condition()
File
"/home/jenkins/workspace/SparkPullRequestBuilder/python/pyspark/mllib/tests/test_streaming_algorithms.py",
line 362, in condition
self.assertGreater(errors[1] - errors[-1], 0.3)
AssertionError: -0.070000000000000062 not greater than 0.3
----------------------------------------------------------------------
Ran 13 tests in 198.327s
FAILED (failures=1, skipped=1)
Had test failures in pyspark.mllib.tests.test_streaming_algorithms with
python3.4; see logs
```
The predict stream can possibly be consumed to the end before the input
stream. When it happens, the model improvement is not high as expected and
causes test failed. This patch tries to increase number of batches of streams.
This won't increase test time because we have a timeout there.
## How was this patch tested?
Manually test.
Closes #23586 from viirya/SPARK-26646.
Authored-by: Liang-Chi Hsieh <vii...@gmail.com>
Signed-off-by: Hyukjin Kwon <gurwls...@apache.org>
---
python/pyspark/mllib/tests/test_streaming_algorithms.py | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/python/pyspark/mllib/tests/test_streaming_algorithms.py
b/python/pyspark/mllib/tests/test_streaming_algorithms.py
index bf2ad2d..cab3010 100644
--- a/python/pyspark/mllib/tests/test_streaming_algorithms.py
+++ b/python/pyspark/mllib/tests/test_streaming_algorithms.py
@@ -334,7 +334,7 @@ class
StreamingLogisticRegressionWithSGDTests(MLLibStreamingTestCase):
"""Test that the model improves on toy data with no. of batches"""
input_batches = [
self.sc.parallelize(self.generateLogisticInput(0, 1.5, 100, 42 +
i))
- for i in range(20)]
+ for i in range(40)]
predict_batches = [
b.map(lambda lp: (lp.label, lp.features)) for b in input_batches]
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