3a6807fdf0
…ion in PySpark Author: Jeff Zhang <zjffdu@apache.org> Closes #9791 from zjffdu/SPARK-11804.
87 lines
3 KiB
Python
87 lines
3 KiB
Python
#
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# Licensed to the Apache Software Foundation (ASF) under one or more
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# contributor license agreements. See the NOTICE file distributed with
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# this work for additional information regarding copyright ownership.
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# The ASF licenses this file to You under the Apache License, Version 2.0
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# (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import py4j
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class CapturedException(Exception):
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def __init__(self, desc, stackTrace):
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self.desc = desc
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self.stackTrace = stackTrace
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def __str__(self):
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return repr(self.desc)
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class AnalysisException(CapturedException):
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"""
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Failed to analyze a SQL query plan.
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"""
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class IllegalArgumentException(CapturedException):
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"""
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Passed an illegal or inappropriate argument.
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"""
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def capture_sql_exception(f):
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def deco(*a, **kw):
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try:
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return f(*a, **kw)
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except py4j.protocol.Py4JJavaError as e:
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s = e.java_exception.toString()
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stackTrace = '\n\t at '.join(map(lambda x: x.toString(),
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e.java_exception.getStackTrace()))
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if s.startswith('org.apache.spark.sql.AnalysisException: '):
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raise AnalysisException(s.split(': ', 1)[1], stackTrace)
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if s.startswith('java.lang.IllegalArgumentException: '):
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raise IllegalArgumentException(s.split(': ', 1)[1], stackTrace)
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raise
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return deco
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def install_exception_handler():
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"""
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Hook an exception handler into Py4j, which could capture some SQL exceptions in Java.
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When calling Java API, it will call `get_return_value` to parse the returned object.
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If any exception happened in JVM, the result will be Java exception object, it raise
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py4j.protocol.Py4JJavaError. We replace the original `get_return_value` with one that
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could capture the Java exception and throw a Python one (with the same error message).
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It's idempotent, could be called multiple times.
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"""
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original = py4j.protocol.get_return_value
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# The original `get_return_value` is not patched, it's idempotent.
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patched = capture_sql_exception(original)
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# only patch the one used in in py4j.java_gateway (call Java API)
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py4j.java_gateway.get_return_value = patched
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def toJArray(gateway, jtype, arr):
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"""
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Convert python list to java type array
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:param gateway: Py4j Gateway
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:param jtype: java type of element in array
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:param arr: python type list
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"""
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jarr = gateway.new_array(jtype, len(arr))
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for i in range(0, len(arr)):
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jarr[i] = arr[i]
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return jarr
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