当我尝试使用 pyspark 将雪花中的数据加载到数据框中时出现此错误:
py4j.protocol.Py4JJavaError: An error occurred while calling o45.load.
: java.lang.NoClassDefFoundError: net/snowflake/client/jdbc/internal/org/bouncycastle/jce/provider/BouncyCastleProvider
这是一些重现错误的代码:
from pyspark.sql import SparkSession
from pyspark import SparkConf
conf = SparkConf()
conf.set('spark.jars.packages',
'net.snowflake:spark-snowflake_2.11:2.8.4-spark_2.4,net.snowflake:snowflake-jdbc:3.12.17')
spark = SparkSession.builder.config(conf=conf).getOrCreate()
sf_reader_options = {'sfURL': 'example.snowflakecomputing.com', 'sfAccount': 'example_account',
'sfWarehouse': 'example_warehouse', 'sfRole': 'DATASCIENCE', 'sfUser': 'user',
'sfPassword': 'pass', 'sfDatabase': 'db_name', 'sfSchema': 'schema_name', 'sfTimezone': 'UTC'}
reader = (spark
.read
.format('net.snowflake.spark.snowflake')
.options(**sf_reader_options))
result = reader.option('query', 'select * from TABLE_NAME').load()
错误的堆栈跟踪如下所示:
Traceback (most recent call last):
File "<input>", line 1, in <module>
File "/Users/charlie/lark/bigbird/venv/lib/python3.7/site-packages/pyspark/sql/readwriter.py", line 172, in load
return self._df(self._jreader.load())
File "/Users/charlie/lark/bigbird/venv/lib/python3.7/site-packages/py4j/java_gateway.py", line 1257, in __call__
answer, self.gateway_client, self.target_id, self.name)
File "/Users/charlie/lark/bigbird/venv/lib/python3.7/site-packages/pyspark/sql/utils.py", line 63, in deco
return f(*a, **kw)
File "/Users/charlie/lark/bigbird/venv/lib/python3.7/site-packages/py4j/protocol.py", line 328, in get_return_value
format(target_id, ".", name), value)
py4j.protocol.Py4JJavaError: An error occurred while calling o45.load.
: java.lang.NoClassDefFoundError: net/snowflake/client/jdbc/internal/org/bouncycastle/jce/provider/BouncyCastleProvider
at net.snowflake.spark.snowflake.Parameters$.mergeParameters(Parameters.scala:202)
at net.snowflake.spark.snowflake.DefaultSource.createRelation(DefaultSource.scala:59)
at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:332)
at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:242)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:230)
at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:186)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357)
at py4j.Gateway.invoke(Gateway.java:282)
at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
at py4j.commands.CallCommand.execute(CallCommand.java:79)
at py4j.GatewayConnection.run(GatewayConnection.java:238)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.ClassNotFoundException: net.snowflake.client.jdbc.internal.org.bouncycastle.jce.provider.BouncyCastleProvider
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 17 more
我正在使用 spark 2.4.7 和 spark-snowflake 2.8.4,以及雪花 jdbc 3.12.17。我在 Mac OS X Big Sur 上。这是在我升级到 Big Sur 后发生的,但我不确定这是否相关。
我试过了:
JAVA_HOME
是否指向 Java 8(确实如此)任何帮助将不胜感激!
答案 0 :(得分:0)
最终,我能够通过以下方式解决此问题:
几乎可以肯定有一种更简单的方法,但这很有效。