Apache spark 为什么Spark报告；java.net.URISyntaxException:绝对URI中的相对路径；在使用数据帧时？

我正在Windows计算机上本地运行Spark。我成功地启动了spark shell，并将文本文件作为RDD读取。我还能够跟随关于这个主题的各种在线教程，并且能够在RDD上执行各种操作

然而，当我试图将RDD转换为数据帧时，我得到了一个错误。这就是我正在做的：

val sqlContext = new org.apache.spark.sql.SQLContext(sc)
import sqlContext.implicits._

//convert rdd to df
val df = rddFile.toDF()

此代码生成一长串错误消息，这些消息似乎与以下消息有关：

Caused by: java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: file:C:/Users/spark/spark-warehouse
        at org.apache.hadoop.fs.Path.initialize(Path.java:205)
        at org.apache.hadoop.fs.Path.<init>(Path.java:171)
        at org.apache.hadoop.hive.metastore.Warehouse.getWhRoot(Warehouse.java:159)
        at org.apache.hadoop.hive.metastore.Warehouse.getDefaultDatabasePath(Warehouse.java:177)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB_core(HiveMetaStore.java:600)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:620)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:461)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:66)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:72)
        at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:5762)
        at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:199)
        at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.<init>(SessionHiveMetaStoreClient.java:74)
        ... 85 more
Caused by: java.net.URISyntaxException: Relative path in absolute URI: file:C:/Users/spark/spark-warehouse
        at java.net.URI.checkPath(URI.java:1823)
        at java.net.URI.<init>(URI.java:745)
        at org.apache.hadoop.fs.Path.initialize(Path.java:202)
        ... 96 more

原因：java.lang.IllegalArgumentException:java.net.URISyntaxException:绝对URI中的相对路径：文件：C:/Users/spark/spark仓库
位于org.apache.hadoop.fs.Path.initialize（Path.java:205）
位于org.apache.hadoop.fs.Path（Path.java:171）
位于org.apache.hadoop.hive.metastore.Warehouse.getWhRoot（Warehouse.java:159）
位于org.apache.hadoop.hive.metastore.Warehouse.getDefaultDatabasePath（Warehouse.java:177）
位于org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB_core（HiveMetaStore.java:600）
位于org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB（HiveMetaStore.java:620）
位于org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init（HiveMetaStore.java:461）
位于org.apache.hadoop.hive.metastore.RetryingHMSHandler（RetryingHMSHandler.java:66）
位于org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy（RetryingHMSHandler.java:72）
位于org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler（HiveMetaStore.java:5762）
位于org.apache.hadoop.hive.metastore.HiveMetaStoreClient。（HiveMetaStoreClient.java:199）
位于org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient。（SessionHiveMetaStoreClient.java:74）
... 85多
原因：java.net.URISyntaxException:绝对URI中的相对路径：文件：C:/Users/spark/spark warehouse
位于java.net.URI.checkPath（URI.java:1823）
位于java.net.URI。（URI.java:745）
位于org.apache.hadoop.fs.Path.initialize（Path.java:202）
... 96多

整个堆栈跟踪如下

16/08/16 12:36:20 WARN ObjectStore: Failed to get database default, returning NoSuchObjectException
16/08/16 12:36:20 WARN Hive: Failed to access metastore. This class should not accessed in runtime.
org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
        at org.apache.hadoop.hive.ql.metadata.Hive.getAllDatabases(Hive.java:1236)
        at org.apache.hadoop.hive.ql.metadata.Hive.reloadFunctions(Hive.java:174)
        at org.apache.hadoop.hive.ql.metadata.Hive.<clinit>(Hive.java:166)
        at org.apache.hadoop.hive.ql.session.SessionState.start(SessionState.java:503)
        at org.apache.spark.sql.hive.client.HiveClientImpl.<init>(HiveClientImpl.scala:171)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at org.apache.spark.sql.hive.client.IsolatedClientLoader.createClient(IsolatedClientLoader.scala:258)
        at org.apache.spark.sql.hive.HiveUtils$.newClientForMetadata(HiveUtils.scala:359)
        at org.apache.spark.sql.hive.HiveUtils$.newClientForMetadata(HiveUtils.scala:263)
        at org.apache.spark.sql.hive.HiveSharedState.metadataHive$lzycompute(HiveSharedState.scala:39)
        at org.apache.spark.sql.hive.HiveSharedState.metadataHive(HiveSharedState.scala:38)
        at org.apache.spark.sql.hive.HiveSharedState.externalCatalog$lzycompute(HiveSharedState.scala:46)
        at org.apache.spark.sql.hive.HiveSharedState.externalCatalog(HiveSharedState.scala:45)
        at org.apache.spark.sql.hive.HiveSessionState.catalog$lzycompute(HiveSessionState.scala:50)
        at org.apache.spark.sql.hive.HiveSessionState.catalog(HiveSessionState.scala:48)
        at org.apache.spark.sql.hive.HiveSessionState$$anon$1.<init>(HiveSessionState.scala:63)
        at org.apache.spark.sql.hive.HiveSessionState.analyzer$lzycompute(HiveSessionState.scala:63)
        at org.apache.spark.sql.hive.HiveSessionState.analyzer(HiveSessionState.scala:62)
        at org.apache.spark.sql.execution.QueryExecution.assertAnalyzed(QueryExecution.scala:49)
        at org.apache.spark.sql.Dataset$.ofRows(Dataset.scala:64)
        at org.apache.spark.sql.SparkSession.baseRelationToDataFrame(SparkSession.scala:382)
        at org.apache.spark.sql.DataFrameReader.load(DataFrameReader.scala:143)
        at org.apache.spark.sql.DataFrameReader.csv(DataFrameReader.scala:401)
        at org.apache.spark.sql.DataFrameReader.csv(DataFrameReader.scala:342)
        at $line14.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw.<init>(<console>:24)
        at $line14.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw.<init>(<console>:29)
        at $line14.$read$$iw$$iw$$iw$$iw$$iw$$iw.<init>(<console>:31)
        at $line14.$read$$iw$$iw$$iw$$iw$$iw.<init>(<console>:33)
        at $line14.$read$$iw$$iw$$iw$$iw.<init>(<console>:35)
        at $line14.$read$$iw$$iw$$iw.<init>(<console>:37)
        at $line14.$read$$iw$$iw.<init>(<console>:39)
        at $line14.$read$$iw.<init>(<console>:41)
        at $line14.$read.<init>(<console>:43)
        at $line14.$read$.<init>(<console>:47)
        at $line14.$read$.<clinit>(<console>)
        at $line14.$eval$.$print$lzycompute(<console>:7)
        at $line14.$eval$.$print(<console>:6)
        at $line14.$eval.$print(<console>)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at scala.tools.nsc.interpreter.IMain$ReadEvalPrint.call(IMain.scala:786)
        at scala.tools.nsc.interpreter.IMain$Request.loadAndRun(IMain.scala:1047)
        at scala.tools.nsc.interpreter.IMain$WrappedRequest$$anonfun$loadAndRunReq$1.apply(IMain.scala:638)
        at scala.tools.nsc.interpreter.IMain$WrappedRequest$$anonfun$loadAndRunReq$1.apply(IMain.scala:637)
        at scala.reflect.internal.util.ScalaClassLoader$class.asContext(ScalaClassLoader.scala:31)
        at scala.reflect.internal.util.AbstractFileClassLoader.asContext(AbstractFileClassLoader.scala:19)
        at scala.tools.nsc.interpreter.IMain$WrappedRequest.loadAndRunReq(IMain.scala:637)
        at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:569)
        at scala.tools.nsc.interpreter.IMain.interpret(IMain.scala:565)
        at scala.tools.nsc.interpreter.ILoop.interpretStartingWith(ILoop.scala:807)
        at scala.tools.nsc.interpreter.ILoop.command(ILoop.scala:681)
        at scala.tools.nsc.interpreter.ILoop.processLine(ILoop.scala:395)
        at scala.tools.nsc.interpreter.ILoop.loop(ILoop.scala:415)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply$mcZ$sp(ILoop.scala:923)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:909)
        at scala.tools.nsc.interpreter.ILoop$$anonfun$process$1.apply(ILoop.scala:909)
        at scala.reflect.internal.util.ScalaClassLoader$.savingContextLoader(ScalaClassLoader.scala:97)
        at scala.tools.nsc.interpreter.ILoop.process(ILoop.scala:909)
        at org.apache.spark.repl.Main$.doMain(Main.scala:68)
        at org.apache.spark.repl.Main$.main(Main.scala:51)
        at org.apache.spark.repl.Main.main(Main.scala)
        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.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:729)
        at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:185)
        at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:210)
        at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:124)
        at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.lang.RuntimeException: Unable to instantiate org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
        at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1523)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.<init>(RetryingMetaStoreClient.java:86)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:132)
        at org.apache.hadoop.hive.metastore.RetryingMetaStoreClient.getProxy(RetryingMetaStoreClient.java:104)
        at org.apache.hadoop.hive.ql.metadata.Hive.createMetaStoreClient(Hive.java:3005)
        at org.apache.hadoop.hive.ql.metadata.Hive.getMSC(Hive.java:3024)
        at org.apache.hadoop.hive.ql.metadata.Hive.getAllDatabases(Hive.java:1234)
        ... 74 more
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
        at org.apache.hadoop.hive.metastore.MetaStoreUtils.newInstance(MetaStoreUtils.java:1521)
        ... 80 more
Caused by: java.lang.IllegalArgumentException: java.net.URISyntaxException: Relative path in absolute URI: file:C:/Users/spark/spark-warehouse
        at org.apache.hadoop.fs.Path.initialize(Path.java:205)
        at org.apache.hadoop.fs.Path.<init>(Path.java:171)
        at org.apache.hadoop.hive.metastore.Warehouse.getWhRoot(Warehouse.java:159)
        at org.apache.hadoop.hive.metastore.Warehouse.getDefaultDatabasePath(Warehouse.java:177)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB_core(HiveMetaStore.java:600)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.createDefaultDB(HiveMetaStore.java:620)
        at org.apache.hadoop.hive.metastore.HiveMetaStore$HMSHandler.init(HiveMetaStore.java:461)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.<init>(RetryingHMSHandler.java:66)
        at org.apache.hadoop.hive.metastore.RetryingHMSHandler.getProxy(RetryingHMSHandler.java:72)
        at org.apache.hadoop.hive.metastore.HiveMetaStore.newRetryingHMSHandler(HiveMetaStore.java:5762)
        at org.apache.hadoop.hive.metastore.HiveMetaStoreClient.<init>(HiveMetaStoreClient.java:199)
        at org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient.<init>(SessionHiveMetaStoreClient.java:74)
        ... 85 more
Caused by: java.net.URISyntaxException: Relative path in absolute URI: file:C:/Users/spark/spark-warehouse
        at java.net.URI.checkPath(URI.java:1823)
        at java.net.URI.<init>(URI.java:745)
        at org.apache.hadoop.fs.Path.initialize(Path.java:202)
        ... 96 more

16/08/16 12:36:20警告对象存储：无法获取数据库默认值，返回NoSuchObjectException
16/08/16 12:36:20警告配置单元：无法访问元存储。不应在运行时访问此类。
org.apache.hadoop.hive.ql.metadata.HiveException:java.lang.RuntimeException:无法实例化org.apache.hadoop.hive.ql.metadata.SessionHiveMetaStoreClient
位于org.apache.hadoop.hive.ql.metadata.hive.getAllDatabases（hive.java:1236）
位于org.apache.hadoop.hive.ql.metadata.hive.reloadFunctions（hive.java:174）
位于org.apache.hadoop.hive.ql.metadata.hive（hive.java:166）
位于org.apache.hadoop.hive.ql.session.SessionState.start（SessionState.java:503）
位于org.apache.spark.sql.hive.client.HiveClientImpl.（HiveClientImpl.scala:171）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance0（本机方法）
位于sun.reflect.NativeConstructorAccessorImpl.newInstance（NativeConstructorAccessorImpl.java:62）
在sun.reflect.DelegatingConstructorAccessorImpl.newInstance（DelegatingConstructorAccessorImpl.java:45）
位于java.lang.reflect.Constructor.newInstance（Constructor.java:423）
位于org.apache.spark.sql.hive.client.IsolatedClient.createClient（IsolatedClient.scala:258）
位于org.apache.spark.sql.hive.HiveUtils$.newClientForMetadata（HiveUtils.scala:359）
位于org.apache.spark.sql.hive.HiveUtils$.newClientForMetadata（HiveUtils.scala:263）
位于org.apache.spark.sql.hive.HiveSharedState.metadataHive$lzycompute（HiveSharedState.scala:39）
位于org.apache.spark.sql.hive.HiveSharedState.metadataHive（HiveSharedState.scala:38）
位于org.apache.spark.sql.hive.HiveSharedState.externalCatalog$lzycompute（HiveSharedState.scala:46）
位于org.apache.spark.sql.hive.HiveSharedState.externalCatalog（HiveSharedState.scala:45）
位于org.apache.spark.sql.hive.HiveSessionState.catalog$lzycompute（HiveSessionState.scala:50）
位于org.apache.spark.sql.hive.HiveSessionState.catalog（HiveSessionState.scala:48）
位于org.apache.spark.sql.hive.HiveSessionState$$anon$1。（HiveSessionState.scala:63）
位于org.apache.spark.sql.hive.HiveSessionState.analyzer$lzycompute（HiveSessionState.scala:63）
位于org.apache.spark.sql.hive.HiveSessionState.analyzer（HiveSessionState.scala:62）
位于org.apache.spark.sql.execution.QueryExecution.assertAnalyzed（QueryExecution.scala:49）
位于org.apache.spark.sql.Dataset$.ofRows（Dataset.scala:64）
位于org.apache.spark.sql.SparkSession.baseRelationToDataFrame（SparkSession.scala:382）
位于org.apache.spark.sql.DataFrameReader.load（DataFrameReader.scala:143）
位于org.apache.spark.sql.DataFrameReader.csv（DataFrameReader.scala:401）
位于org.apache.spark.sql.DataFrameReader.csv（DataFrameReader.scala:342）
在$line14.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw。（：24）
在$line14.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw$$iw。（：29）
在$line14.$read$$iw$$iw$$iw$$iw$$iw$$iw$$iw。（：31）
在$line14.$read$$iw$$iw$$iw$$iw$$iw$$iw。（：33）
在$line14.$read$$iw$$iw$$iw$$iw。（：35）
在$line14。$read$$iw$$iw$$iw。（：37）
在$line14。$read$$iw$$iw。（：39）
在$line14。$read$$iw。（：41）
$line14.$read.（：43）
在$line14.$read$（：47）
第14行$read$（）
在$line14.$eval$.$print$lzycompute（：7）
在$line14.$eval$.$print处（：6）
在$line14.$eval.$print（）处
在sun.reflect.NativeMethodAccessorImpl.invoke0（本机方法）处
位于sun.reflect.NativeMethodAccessorImpl.invoke（NativeMethodAccessorImpl.java:62）
在sun.reflect.DelegatingMethodAccessorImpl.invoke（DelegatingMethodAccessorImpl.java:43）中
位于java.lang.reflect.Method.invoke（Method.java:498）
位于scala.tools.nsc.explorer.IMain$ReadEvalPrint.ca
spark-shell --conf spark.sql.warehouse.dir=file:///c:/tmp/spark-warehouse

import org.apache.spark.sql.SparkSession
SparkSession spark = SparkSession
  .builder()
  .config("spark.sql.warehouse.dir", "file:///c:/tmp/spark-warehouse")
  .getOrCreate()

spark.sql.warehouse.dir file:///c:/tmp/spark-warehouse

System.setProperty(
    "spark.sql.warehouse.dir", 
    s"file:///${System.getProperty("user.dir")}/spark-warehouse"
    .replaceAll("\\\\", "/")
)

System.setProperty("spark.sql.warehouse.dir", "file:///C:/spark-warehouse");

System.setProperty("hadoop.home.dir", "c:/winutil/");
System.setProperty("spark.sql.warehouse.dir", "file:///C:/spark-warehouse");
val conf = new SparkConf().setAppName("test").setMaster("local[*]")
val sc = new SparkContext(conf)
val lines = sc.textFile("C:/user.txt")