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Posted to reviews@spark.apache.org by GitBox <gi...@apache.org> on 2020/10/06 07:06:46 UTC

[GitHub] [spark] BryanCutler opened a new pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

BryanCutler opened a new pull request #29951:
URL: https://github.com/apache/spark/pull/29951


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   This improves error handling when a failure in conversion from Pandas to Arrow occurs. And fixes tests to be compatible with upcoming Arrow 2.0.0 release.
   
   ### Why are the changes needed?
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   Current tests will fail with Arrow 2.0.0 because of a change in error message when the schema is invalid. For these cases, the current error message also includes information on disabling safe conversion config, which is mainly meant for floating point truncation and overflow. The tests have been updated to use a message that is show for past Arrow versions, and upcoming.
   
   If the user enters an invalid schema, the error produced by pyarrow is not consistent and either `TypeError` or ArrowInvalid`, with the latter being caught, and raised as a `RuntimeError` with the extra info.
   
   The error handling is improved by:
   
   - narrowing the exception type to `TypeError`s, which `ArrowInvalid` is a subclass and what is raised on safe conversion failures.
   - The exception is only raised with additional information on disabling "spark.sql.execution.pandas.convertToArrowArraySafely" if it is enabled in the first place.
   - The original exception is chained to better show it to the user.
   
   ### Does this PR introduce _any_ user-facing change?
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   Note that it means *any* user-facing change including all aspects such as the documentation fix.
   If yes, please clarify the previous behavior and the change this PR proposes - provide the console output, description and/or an example to show the behavior difference if possible.
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   Yes, the error re-raised changes from a RuntimeError to a ValueError, which better categorizes this type of error and in-line with the original Arrow error.
   
   ### How was this patch tested?
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   Existing tests, using pyarrow 1.0.1 and 2.0.0-snapshot


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[GitHub] [spark] dongjoon-hyun edited a comment on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun edited a comment on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704616719


   Could you take a look at that please?
   - https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Test%20(Dashboard)/job/spark-branch-3.0-test-sbt-hadoop-2.7-hive-1.2/876/console
   
   ![Screen Shot 2020-10-06 at 5 08 16 PM](https://user-images.githubusercontent.com/9700541/95272931-8fbfe800-07f6-11eb-8f32-e822d67ef831.png)
   


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[GitHub] [spark] AmplabJenkins commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
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URL: https://github.com/apache/spark/pull/29951#issuecomment-704087509






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[GitHub] [spark] BryanCutler commented on a change in pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
BryanCutler commented on a change in pull request #29951:
URL: https://github.com/apache/spark/pull/29951#discussion_r500050618



##########
File path: python/pyspark/sql/pandas/serializers.py
##########
@@ -153,13 +153,16 @@ def create_array(s, t):
                 s = s.astype(s.dtypes.categories.dtype)
             try:
                 array = pa.Array.from_pandas(s, mask=mask, type=t, safe=self._safecheck)
-            except pa.ArrowException as e:
-                error_msg = "Exception thrown when converting pandas.Series (%s) to Arrow " + \
-                            "Array (%s). It can be caused by overflows or other unsafe " + \
-                            "conversions warned by Arrow. Arrow safe type check can be " + \
-                            "disabled by using SQL config " + \
-                            "`spark.sql.execution.pandas.convertToArrowArraySafely`."
-                raise RuntimeError(error_msg % (s.dtype, t), e)
+            except ValueError as e:

Review comment:
       errors during safe conversion will be `ArrowInvalid`, which subclasses ValueError

##########
File path: python/pyspark/sql/pandas/serializers.py
##########
@@ -153,13 +153,16 @@ def create_array(s, t):
                 s = s.astype(s.dtypes.categories.dtype)
             try:
                 array = pa.Array.from_pandas(s, mask=mask, type=t, safe=self._safecheck)
-            except pa.ArrowException as e:
-                error_msg = "Exception thrown when converting pandas.Series (%s) to Arrow " + \
-                            "Array (%s). It can be caused by overflows or other unsafe " + \
-                            "conversions warned by Arrow. Arrow safe type check can be " + \
-                            "disabled by using SQL config " + \
-                            "`spark.sql.execution.pandas.convertToArrowArraySafely`."
-                raise RuntimeError(error_msg % (s.dtype, t), e)
+            except ValueError as e:
+                if self._safecheck:
+                    error_msg = "Exception thrown when converting pandas.Series (%s) to " + \
+                                "Arrow Array (%s). It can be caused by overflows or other " + \
+                                "unsafe conversions warned by Arrow. Arrow safe type check " + \
+                                "can be disabled by using SQL config " + \
+                                "`spark.sql.execution.pandas.convertToArrowArraySafely`."
+                    raise ValueError(error_msg % (s.dtype, t)) from e

Review comment:
       Now that we dropped Python 2, this seems more appropriate




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[GitHub] [spark] HyukjinKwon removed a comment on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon removed a comment on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704138891






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[GitHub] [spark] HyukjinKwon commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704617216


   I'll actually revert this out of branch-3.0, and leave it to @BryanCutler to open a PR to backport.


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[GitHub] [spark] SparkQA commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704087175


   **[Test build #129437 has finished](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/129437/testReport)** for PR 29951 at commit [`e7a09e9`](https://github.com/apache/spark/commit/e7a09e9dce49f6246957cb1965c26dbe846acbe8).
    * This patch passes all tests.
    * This patch merges cleanly.
    * This patch adds no public classes.


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Posted by GitBox <gi...@apache.org>.
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Posted by GitBox <gi...@apache.org>.
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[GitHub] [spark] HyukjinKwon commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704139163


   Merged to master and branch-3.0.


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Posted by GitBox <gi...@apache.org>.
SparkQA removed a comment on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704078067


   **[Test build #129437 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/129437/testReport)** for PR 29951 at commit [`e7a09e9`](https://github.com/apache/spark/commit/e7a09e9dce49f6246957cb1965c26dbe846acbe8).


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[GitHub] [spark] BryanCutler commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
BryanCutler commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704696121


   Shoot, sorry about that. Exception chaining is only a Python 3 thing. I'll fix this up for branch-3.0 since that is still testing with Python 2.


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[GitHub] [spark] dongjoon-hyun commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704616370


   Hi, @BryanCutler and @HyukjinKwon . This seems to break branch-3.0.


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[GitHub] [spark] BryanCutler commented on a change in pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
BryanCutler commented on a change in pull request #29951:
URL: https://github.com/apache/spark/pull/29951#discussion_r500051665



##########
File path: python/pyspark/sql/tests/test_arrow.py
##########
@@ -264,11 +264,12 @@ def test_createDataFrame_with_schema(self):
     def test_createDataFrame_with_incorrect_schema(self):
         pdf = self.create_pandas_data_frame()
         fields = list(self.schema)
-        fields[0], fields[1] = fields[1], fields[0]  # swap str with int
+        fields[5], fields[6] = fields[6], fields[5]  # swap decimal with date
         wrong_schema = StructType(fields)
-        with QuietTest(self.sc):
-            with self.assertRaisesRegexp(Exception, "integer.*required"):
-                self.spark.createDataFrame(pdf, schema=wrong_schema)
+        with self.sql_conf({"spark.sql.execution.pandas.convertToArrowArraySafely": False}):

Review comment:
       The error here is a `TypeError`, but in case it gets changed to an `ArrowInvalid`, we do not want to have the original error chained because the assert does not include it when checking




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[GitHub] [spark] dongjoon-hyun commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704616719


   Could you take a look at that please?
   - https://amplab.cs.berkeley.edu/jenkins/view/Spark%20QA%20Test%20(Dashboard)/job/spark-branch-3.0-test-sbt-hadoop-2.7-hive-1.2/876/console


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[GitHub] [spark] HyukjinKwon commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704696892


   Thanks!


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[GitHub] [spark] dongjoon-hyun commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704653810


   Thank you for swift fix, @HyukjinKwon .


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[GitHub] [spark] SparkQA commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704096262


   Kubernetes integration test starting
   URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/34044/
   


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[GitHub] [spark] HyukjinKwon closed pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon closed pull request #29951:
URL: https://github.com/apache/spark/pull/29951


   


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[GitHub] [spark] dongjoon-hyun commented on a change in pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
dongjoon-hyun commented on a change in pull request #29951:
URL: https://github.com/apache/spark/pull/29951#discussion_r500663540



##########
File path: python/pyspark/sql/pandas/serializers.py
##########
@@ -153,13 +153,16 @@ def create_array(s, t):
                 s = s.astype(s.dtypes.categories.dtype)
             try:
                 array = pa.Array.from_pandas(s, mask=mask, type=t, safe=self._safecheck)
-            except pa.ArrowException as e:
-                error_msg = "Exception thrown when converting pandas.Series (%s) to Arrow " + \
-                            "Array (%s). It can be caused by overflows or other unsafe " + \
-                            "conversions warned by Arrow. Arrow safe type check can be " + \
-                            "disabled by using SQL config " + \
-                            "`spark.sql.execution.pandas.convertToArrowArraySafely`."
-                raise RuntimeError(error_msg % (s.dtype, t), e)
+            except ValueError as e:
+                if self._safecheck:
+                    error_msg = "Exception thrown when converting pandas.Series (%s) to " + \
+                                "Arrow Array (%s). It can be caused by overflows or other " + \
+                                "unsafe conversions warned by Arrow. Arrow safe type check " + \
+                                "can be disabled by using SQL config " + \
+                                "`spark.sql.execution.pandas.convertToArrowArraySafely`."
+                    raise ValueError(error_msg % (s.dtype, t)) from e

Review comment:
       In `branch-3.0`.
   
   ```
     File "/home/jenkins/workspace/spark-branch-3.0-test-sbt-hadoop-2.7-hive-1.2/python/pyspark/sql/pandas/serializers.py", line 166
       raise ValueError(error_msg % (s.dtype, t)) from e
                                                 ^
   SyntaxError: invalid syntax
   ```




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[GitHub] [spark] SparkQA commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704078067


   **[Test build #129437 has started](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/129437/testReport)** for PR 29951 at commit [`e7a09e9`](https://github.com/apache/spark/commit/e7a09e9dce49f6246957cb1965c26dbe846acbe8).


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[GitHub] [spark] HyukjinKwon edited a comment on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon edited a comment on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704138333


   Merged to master.


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[GitHub] [spark] BryanCutler commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
BryanCutler commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704079948


   Thanks @HyukjinKwon , you're fast :grin: 
   This will help get the Spark integration tests passing in https://github.com/apache/arrow/pull/8352


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[GitHub] [spark] HyukjinKwon commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704618056


   Reverted from branch-3.0. @BryanCutler would you mind opening a PR to port back?


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[GitHub] [spark] HyukjinKwon commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704617124


   Sure!


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[GitHub] [spark] AmplabJenkins commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
AmplabJenkins commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704105115






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[GitHub] [spark] HyukjinKwon commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704138891


   @BryanCutler, It would need a separate PR to port back - seems it conflicts in the branch-3.0.


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[GitHub] [spark] HyukjinKwon commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
HyukjinKwon commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704138333


   Merged to master and branch-3.0.


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[GitHub] [spark] SparkQA commented on pull request #29951: [SPARK-33073][PYTHON] Improve error handling on Pandas to Arrow conversion failures

Posted by GitBox <gi...@apache.org>.
SparkQA commented on pull request #29951:
URL: https://github.com/apache/spark/pull/29951#issuecomment-704105088


   Kubernetes integration test status success
   URL: https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder-K8s/34044/
   


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