Question

我正在尝试安装mongodb spark连接器。一切顺利，但是当我运行火花代码时，会出现以下问题。请帮忙。

MongoDBConnector - 2.2.2 Spark - 2.2.0 Mongodb版本 - 3.6

   18/05/08 11:18:39 INFO StateStoreCoordinatorRef: Registered StateStoreCoordinator endpoint
    Traceback (most recent call last):
      File "/home/cisco/spark-mongo-test.py", line 7, in <module>
        df = spark.read.format("com.mongodb.spark.sql.DefaultSource").load()
      File "/home/cisco/spark-2.2.0-bin-hadoop2.7/python/lib/pyspark.zip/pyspark/sql/readwriter.py", line 165, in load
      File "/home/cisco/spark-2.2.0-bin-hadoop2.7/python/lib/py4j-0.10.4-src.zip/py4j/java_gateway.py", line 1133, in __call__
      File "/home/cisco/spark-2.2.0-bin-hadoop2.7/python/lib/pyspark.zip/pyspark/sql/utils.py", line 63, in deco
      File "/home/cisco/spark-2.2.0-bin-hadoop2.7/python/lib/py4j-0.10.4-src.zip/py4j/protocol.py", line 319, in get_return_value
    py4j.protocol.Py4JJavaError: An error occurred while calling o39.load.
    : java.lang.ClassNotFoundException: Failed to find data source: com.mongodb.spark.sql.DefaultSource. Please find packages at http://spark.apache.org/third-party-projects.html
            at org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:549)
            at org.apache.spark.sql.execution.datasources.DataSource.providingClass$lzycompute(DataSource.scala:86)
            at org.apache.spark.sql.execution.datasources.DataSource.providingClass(DataSource.scala:86)
            at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:301)
            at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:178)
            at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:146)
            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:280)
            at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
            at py4j.commands.CallCommand.execute(CallCommand.java:79)
            at py4j.GatewayConnection.run(GatewayConnection.java:214)
            at java.lang.Thread.run(Thread.java:748)
    Caused by: java.lang.ClassNotFoundException: com.mongodb.spark.sql.DefaultSource.DefaultSource
            at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
            at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
            at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$21$$anonfun$apply$12.apply(DataSource.scala:533)
            at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$21$$anonfun$apply$12.apply(DataSource.scala:533)
            at scala.util.Try$.apply(Try.scala:192)
            at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$21.apply(DataSource.scala:533)
            at org.apache.spark.sql.execution.datasources.DataSource$$anonfun$21.apply(DataSource.scala:533)
            at scala.util.Try.orElse(Try.scala:84)
            at org.apache.spark.sql.execution.datasources.DataSource$.lookupDataSource(DataSource.scala:53

Answer 1

我认为您应该将此行添加到[spark-home] /conf/spark-defaults.conf：

spark.jars.packages     org.mongodb.spark:mongo-spark-connector_2.11:2.3.0

Answer 2

对我来说，问题是我的[spark-home] / jars目录中没有包含mongo-spark-connector_2.11.jar文件的jar文件。您可以在此处下载它们：

https://jar-download.com/?search_box=mongo%20spark%20connector

PySpark的mongodb-spark连接器问题（Class not found exception：com.mongodb.spark.sql.DefaultSource）

2 个答案: