我是.NETApacheSpark的初学者，正在尝试使用.NETApacheSpark中的jdbc连接到MSSQLLocalDB。
我试图从一个sql表中读取数据，并不断得到错误“空指针异常”。
任何建议或帮助将不胜感激，因为它在过去3天解决？
注意：使用.NETCore3.1和ApacheSpark2.4.1
代码

var connectionProperties = new Dictionary<string, string>();
        connectionProperties.Add("Driver", "com.microsoft.sqlserver.jdbc.SQLServerDriver");

        DataFrame sparkDataFrame = spark.Read().Jdbc("jdbc:sqlserver:\\\\.\\pipe\\LOCALDB#1E0C8EA3\\tsql\\query;database=SparkTest;IntegratedSecurity=true", 
            "Entry", connectionProperties);

错误：

[2020-10-03T18:28:09.5755953Z] [GBRPLM20407203] [Error] [JvmBridge] JVM method execution failed: Nonstatic method 'jdbc' failed for class '7' when called with 3 arguments ([Index=1, Type=String, Value=jdbc:sqlserver:\\.\pipe\LOCALDB#1E0C8EA3\tsql\query;database=SparkTest;IntegratedSecurity=true], [Index=2, Type=String, Value=Entry], [Index=3, Type=Properties, Value=Microsoft.Spark.Interop.Internal.Java.Util.Properties], )
[2020-10-03T18:28:09.5756681Z] [GBRPLM20407203] [Error] [JvmBridge] java.lang.NullPointerException
        at org.apache.spark.sql.execution.datasources.jdbc.JDBCRDD$.resolveTable(JDBCRDD.scala:71)
        at org.apache.spark.sql.execution.datasources.jdbc.JDBCRelation$.getSchema(JDBCRelation.scala:210)
        at org.apache.spark.sql.execution.datasources.jdbc.JdbcRelationProvider.createRelation(JdbcRelationProvider.scala:35)
        at org.apache.spark.sql.execution.datasources.DataSource.resolveRelation(DataSource.scala:318)
        at org.apache.spark.sql.DataFrameReader.loadV1Source(DataFrameReader.scala:223)
        at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:211)
        at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:167)
        at org.apache.spark.sql.DataFrameReader.jdbc(DataFrameReader.scala:238)
        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 org.apache.spark.api.dotnet.DotnetBackendHandler.handleMethodCall(DotnetBackendHandler.scala:162)
        at org.apache.spark.api.dotnet.DotnetBackendHandler.handleBackendRequest(DotnetBackendHandler.scala:102)
        at org.apache.spark.api.dotnet.DotnetBackendHandler.channelRead0(DotnetBackendHandler.scala:29)
        at org.apache.spark.api.dotnet.DotnetBackendHandler.channelRead0(DotnetBackendHandler.scala:24)
        at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:102)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310)
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:284)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1359)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:935)
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:138)
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580)
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459)
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858)
        at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:138)
        at java.lang.Thread.run(Thread.java:748)