Ошибка в Apache Spark при сохранении файла на компьютер
Прошу подсказать знающих людей. Я работаю на локальном Apache Spark, делаю анализ данных. Хочу переменную train сохранить в csv. Пишу следующий код.
train.write.option("header", "true") \
.option("delimiter", "|") \
.csv("output_file_path123.csv")
Мне вылезает большая ошибка, но основная фраза я так понимаю эта :
org.apache.hadoop.io.nativeio.NativeIO$Windows.access0
Я погуглил и понимаю что у Hadoop есть проблемы совместимости с Windows.
Но необходимый костыль в виде winutils.exe я использую.
Пути ,насколькко я могу судить прописаны верно.
Как мне решить эту проблему?
Заранее спасибо

текст ошибки
---------------------------------------------------------------------------
Py4JJavaError Traceback (most recent call last)
c:\Users\usr\Downloads\ODS Linear.ipynb Cell 10 line 3
1 train.write.option("header", "true") \
2 .option("delimiter", "|") \
----> 3 .csv("output_file_path1223.csv")
File c:\Users\usr\anaconda3\lib\site-packages\pyspark\sql\readwriter.py:1799, in DataFrameWriter.csv(self, path, mode, compression, sep, quote, escape, header, nullValue, escapeQuotes, quoteAll, dateFormat, timestampFormat, ignoreLeadingWhiteSpace, ignoreTrailingWhiteSpace, charToEscapeQuoteEscaping, encoding, emptyValue, lineSep)
1780 self.mode(mode)
1781 self._set_opts(
1782 compression=compression,
1783 sep=sep,
ref='c:\Users\usr\anaconda3\lib\site-packages\pyspark\sql\readwriter.py:1'>1</a>;32m (...)
1797 lineSep=lineSep,
1798 )
-> 1799 self._jwrite.csv(path)
File c:\Users\usr\anaconda3\lib\site-packages\py4j\java_gateway.py:1322, in JavaMember.__call__(self, *args)
1316 command = proto.CALL_COMMAND_NAME +\
1317 self.command_header +\
1318 args_command +\
1319 proto.END_COMMAND_PART
1321 answer = self.gateway_client.send_command(command)
-> 1322 return_value = get_return_value(
1323 answer, self.gateway_client, self.target_id, self.name)
1325 for temp_arg in temp_args:
1326 if hasattr(temp_arg, "_detach"):
File c:\Users\usr\anaconda3\lib\site-packages\pyspark\errors\exceptions\captured.py:169, in capture_sql_exception.<locals>.deco(*a, **kw)
167 def deco(*a: Any, **kw: Any) -> Any:
168 try:
--> 169 return f(*a, **kw)
170 except Py4JJavaError as e:
171 converted = convert_exception(e.java_exception)
File c:\Users\usr\anaconda3\lib\site-packages\py4j\protocol.py:326, in get_return_value(answer, gateway_client, target_id, name)
324 value = OUTPUT_CONVERTER[type](answer[2:], gateway_client)
325 if answer[1] == REFERENCE_TYPE:
--> 326 raise Py4JJavaError(
327 "An error occurred while calling {0}{1}{2}.\n".
328 format(target_id, ".", name), value)
329 else:
330 raise Py4JError(
331 "An error occurred while calling {0}{1}{2}. Trace:\n{3}\n".
332 format(target_id, ".", name, value))
Py4JJavaError: An error occurred while calling o49.csv.
: java.lang.UnsatisfiedLinkError: 'boolean org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(java.lang.String, int)'
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Native Method)
at org.apache.hadoop.io.nativeio.NativeIO$Windows.access(NativeIO.java:793)
at org.apache.hadoop.fs.FileUtil.canRead(FileUtil.java:1249)
at org.apache.hadoop.fs.FileUtil.list(FileUtil.java:1454)
at org.apache.hadoop.fs.RawLocalFileSystem.listStatus(RawLocalFileSystem.java:601)
at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:1972)
at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:2014)
at org.apache.hadoop.fs.ChecksumFileSystem.listStatus(ChecksumFileSystem.java:761)
at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:1972)
at org.apache.hadoop.fs.FileSystem.listStatus(FileSystem.java:2014)
at org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.getAllCommittedTaskPaths(FileOutputCommitter.java:334)
at org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.commitJobInternal(FileOutputCommitter.java:404)
at org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter.commitJob(FileOutputCommitter.java:377)
at org.apache.spark.internal.io.HadoopMapReduceCommitProtocol.commitJob(HadoopMapReduceCommitProtocol.scala:192)
at org.apache.spark.sql.execution.datasources.FileFormatWriter$.$anonfun$writeAndCommit$3(FileFormatWriter.scala:275)
at scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
at org.apache.spark.util.Utils$.timeTakenMs(Utils.scala:640)
at org.apache.spark.sql.execution.datasources.FileFormatWriter$.writeAndCommit(FileFormatWriter.scala:275)
at org.apache.spark.sql.execution.datasources.FileFormatWriter$.executeWrite(FileFormatWriter.scala:304)
at org.apache.spark.sql.execution.datasources.FileFormatWriter$.write(FileFormatWriter.scala:190)
at org.apache.spark.sql.execution.datasources.InsertIntoHadoopFsRelationCommand.run(InsertIntoHadoopFsRelationCommand.scala:190)
at org.apache.spark.sql.execution.command.DataWritingCommandExec.sideEffectResult$lzycompute(commands.scala:113)
at org.apache.spark.sql.execution.command.DataWritingCommandExec.sideEffectResult(commands.scala:111)
at org.apache.spark.sql.execution.command.DataWritingCommandExec.executeCollect(commands.scala:125)
at org.apache.spark.sql.execution.QueryExecution$$anonfun$eagerlyExecuteCommands$1.$anonfun$applyOrElse$1(QueryExecution.scala:98)
at org.apache.spark.sql.execution.SQLExecution$.$anonfun$withNewExecutionId$6(SQLExecution.scala:118)
at org.apache.spark.sql.execution.SQLExecution$.withSQLConfPropagated(SQLExecution.scala:195)
at org.apache.spark.sql.execution.SQLExecution$.$anonfun$withNewExecutionId$1(SQLExecution.scala:103)
at org.apache.spark.sql.SparkSession.withActive(SparkSession.scala:827)
at org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:65)
at org.apache.spark.sql.execution.QueryExecution$$anonfun$eagerlyExecuteCommands$1.applyOrElse(QueryExecution.scala:98)
at org.apache.spark.sql.execution.QueryExecution$$anonfun$eagerlyExecuteCommands$1.applyOrElse(QueryExecution.scala:94)
at org.apache.spark.sql.catalyst.trees.TreeNode.$anonfun$transformDownWithPruning$1(TreeNode.scala:512)
at org.apache.spark.sql.catalyst.trees.CurrentOrigin$.withOrigin(TreeNode.scala:104)
at org.apache.spark.sql.catalyst.trees.TreeNode.transformDownWithPruning(TreeNode.scala:512)
at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.org$apache$spark$sql$catalyst$plans$logical$AnalysisHelper$$super$transformDownWithPruning(LogicalPlan.scala:31)
at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformDownWithPruning(AnalysisHelper.scala:267)
at org.apache.spark.sql.catalyst.plans.logical.AnalysisHelper.transformDownWithPruning$(AnalysisHelper.scala:263)
at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformDownWithPruning(LogicalPlan.scala:31)
at org.apache.spark.sql.catalyst.plans.logical.LogicalPlan.transformDownWithPruning(LogicalPlan.scala:31)
at org.apache.spark.sql.catalyst.trees.TreeNode.transformDown(TreeNode.scala:488)
at org.apache.spark.sql.execution.QueryExecution.eagerlyExecuteCommands(QueryExecution.scala:94)
at org.apache.spark.sql.execution.QueryExecution.commandExecuted$lzycompute(QueryExecution.scala:81)
at org.apache.spark.sql.execution.QueryExecution.commandExecuted(QueryExecution.scala:79)
at org.apache.spark.sql.execution.QueryExecution.assertCommandExecuted(QueryExecution.scala:133)
at org.apache.spark.sql.DataFrameWriter.runCommand(DataFrameWriter.scala:856)
at org.apache.spark.sql.DataFrameWriter.saveToV1Source(DataFrameWriter.scala:387)
at org.apache.spark.sql.DataFrameWriter.saveInternal(DataFrameWriter.scala:360)
at org.apache.spark.sql.DataFrameWriter.save(DataFrameWriter.scala:239)
at org.apache.spark.sql.DataFrameWriter.csv(DataFrameWriter.scala:847)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244)
at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:374)
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.ClientServerConnection.waitForCommands(ClientServerConnection.java:182)
at py4j.ClientServerConnection.run(ClientServerConnection.java:106)
at java.base/java.lang.Thread.run(Thread.java:833)
Ответы (1 шт):
Автор решения: Andrei Batutin
→ Ссылка
Скачал hadoop.dll и положил в hadoop/bins. Во все системные и переменные пути окружения добавил %HADOOP_HOME%\bin. Работает.