arvind-dhariwal commented on issue #10808:
URL: https://github.com/apache/iceberg/issues/10808#issuecomment-2769663429

   Py4JJavaError: An error occurred while calling o457.showString.
   : org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 
in stage 0.0 failed 4 times, most recent failure: Lost task 0.3 in stage 0.0 
(TID 3) (10.0.0.14 executor driver): java.lang.UnsupportedOperationException: 
Byte-buffer read unsupported by 
com.databricks.common.filesystem.LokiGCSInputStream
        at 
org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:160)
        at 
com.databricks.spark.metrics.FSInputStreamWithMetrics.$anonfun$read$1(FileSystemWithMetrics.scala:77)
        at 
com.databricks.spark.metrics.FSInputStreamWithMetrics.withTimeAndBytesReadMetric(FileSystemWithMetrics.scala:67)
        at 
com.databricks.spark.metrics.FSInputStreamWithMetrics.read(FileSystemWithMetrics.scala:77)
        at 
org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:156)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.util.H2SeekableInputStream$H2Reader.read(H2SeekableInputStream.java:82)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.util.H2SeekableInputStream.readFully(H2SeekableInputStream.java:91)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.util.H2SeekableInputStream.readFully(H2SeekableInputStream.java:76)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.ParquetFileReader.readFooter(ParquetFileReader.java:584)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.ParquetFileReader.<init>(ParquetFileReader.java:799)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.ParquetFileReader.open(ParquetFileReader.java:666)
        at org.apache.iceberg.parquet.ReadConf.newReader(ReadConf.java:238)
        at org.apache.iceberg.parquet.ReadConf.<init>(ReadConf.java:81)
        at 
org.apache.iceberg.parquet.VectorizedParquetReader.init(VectorizedParquetReader.java:90)
        at 
org.apache.iceberg.parquet.VectorizedParquetReader.iterator(VectorizedParquetReader.java:99)
        at 
org.apache.iceberg.spark.source.BatchDataReader.open(BatchDataReader.java:109)
        at 
org.apache.iceberg.spark.source.BatchDataReader.open(BatchDataReader.java:41)
        at org.apache.iceberg.spark.source.BaseReader.next(BaseReader.java:143)
        at 
org.apache.spark.sql.execution.datasources.v2.PartitionIterator.hasNext(DataSourceRDD.scala:122)
        at 
org.apache.spark.sql.execution.datasources.v2.MetricsIterator.hasNext(DataSourceRDD.scala:160)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.$anonfun$hasNext$1(DataSourceRDD.scala:64)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.$anonfun$hasNext$1$adapted(DataSourceRDD.scala:64)
        at scala.Option.exists(Option.scala:376)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.hasNext(DataSourceRDD.scala:64)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.advanceToNextIter(DataSourceRDD.scala:99)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.hasNext(DataSourceRDD.scala:64)
        at 
org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:37)
        at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:460)
        at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.columnartorow_nextBatch_0$(Unknown
 Source)
        at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown
 Source)
        at 
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
        at 
org.apache.spark.sql.execution.WholeStageCodegenEvaluatorFactory$WholeStageCodegenPartitionEvaluator$$anon$1.hasNext(WholeStageCodegenEvaluatorFactory.scala:50)
        at 
org.apache.spark.sql.execution.collect.UnsafeRowBatchUtils$.$anonfun$encodeUnsafeRows$5(UnsafeRowBatchUtils.scala:88)
        at 
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.sql.execution.collect.UnsafeRowBatchUtils$.$anonfun$encodeUnsafeRows$3(UnsafeRowBatchUtils.scala:88)
        at 
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.sql.execution.collect.UnsafeRowBatchUtils$.$anonfun$encodeUnsafeRows$1(UnsafeRowBatchUtils.scala:68)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.sql.execution.collect.UnsafeRowBatchUtils$.encodeUnsafeRows(UnsafeRowBatchUtils.scala:62)
        at 
org.apache.spark.sql.execution.collect.Collector.$anonfun$processFunc$2(Collector.scala:207)
        at 
org.apache.spark.scheduler.ResultTask.$anonfun$runTask$2(ResultTask.scala:76)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.scheduler.ResultTask.$anonfun$runTask$1(ResultTask.scala:76)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:62)
        at 
org.apache.spark.TaskContext.runTaskWithListeners(TaskContext.scala:227)
        at org.apache.spark.scheduler.Task.doRunTask(Task.scala:204)
        at org.apache.spark.scheduler.Task.$anonfun$run$5(Task.scala:166)
        at 
com.databricks.unity.EmptyHandle$.runWithAndClose(UCSHandle.scala:134)
        at org.apache.spark.scheduler.Task.$anonfun$run$1(Task.scala:160)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at org.apache.spark.scheduler.Task.run(Task.scala:105)
        at 
org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$11(Executor.scala:1171)
        at 
org.apache.spark.util.SparkErrorUtils.tryWithSafeFinally(SparkErrorUtils.scala:64)
        at 
org.apache.spark.util.SparkErrorUtils.tryWithSafeFinally$(SparkErrorUtils.scala:61)
        at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:111)
        at 
org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:1175)
        at 
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:1041)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:840)
   
   Driver stacktrace:
        at 
org.apache.spark.scheduler.DAGScheduler.$anonfun$failJobAndIndependentStages$1(DAGScheduler.scala:4071)
        at scala.Option.getOrElse(Option.scala:189)
        at 
org.apache.spark.scheduler.DAGScheduler.failJobAndIndependentStages(DAGScheduler.scala:4069)
        at 
org.apache.spark.scheduler.DAGScheduler.$anonfun$abortStage$2(DAGScheduler.scala:3983)
        at 
org.apache.spark.scheduler.DAGScheduler.$anonfun$abortStage$2$adapted(DAGScheduler.scala:3970)
        at 
scala.collection.mutable.ResizableArray.foreach(ResizableArray.scala:62)
        at 
scala.collection.mutable.ResizableArray.foreach$(ResizableArray.scala:55)
        at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:49)
        at 
org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:3970)
        at 
org.apache.spark.scheduler.DAGScheduler.$anonfun$handleTaskSetFailed$1(DAGScheduler.scala:1794)
        at 
org.apache.spark.scheduler.DAGScheduler.$anonfun$handleTaskSetFailed$1$adapted(DAGScheduler.scala:1777)
        at scala.Option.foreach(Option.scala:407)
        at 
org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:1777)
        at 
org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:4330)
        at 
org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:4232)
        at 
org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:4218)
        at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:55)
        at 
org.apache.spark.scheduler.DAGScheduler.$anonfun$runJob$1(DAGScheduler.scala:1438)
        at 
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at 
com.databricks.spark.util.FrameProfiler$.record(FrameProfiler.scala:94)
        at 
org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:1424)
        at org.apache.spark.SparkContext.runJobInternal(SparkContext.scala:3185)
        at 
org.apache.spark.sql.execution.collect.Collector.$anonfun$runSparkJobs$1(Collector.scala:348)
        at 
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at 
com.databricks.spark.util.FrameProfiler$.record(FrameProfiler.scala:94)
        at 
org.apache.spark.sql.execution.collect.Collector.runSparkJobs(Collector.scala:292)
        at 
org.apache.spark.sql.execution.collect.Collector.$anonfun$collect$1(Collector.scala:377)
        at 
com.databricks.spark.util.FrameProfiler$.record(FrameProfiler.scala:94)
        at 
org.apache.spark.sql.execution.collect.Collector.collect(Collector.scala:374)
        at 
org.apache.spark.sql.execution.collect.Collector$.collect(Collector.scala:116)
        at 
org.apache.spark.sql.execution.collect.Collector$.collect(Collector.scala:124)
        at 
org.apache.spark.sql.execution.qrc.InternalRowFormat$.collect(cachedSparkResults.scala:94)
        at 
org.apache.spark.sql.execution.qrc.InternalRowFormat$.collect(cachedSparkResults.scala:90)
        at 
org.apache.spark.sql.execution.qrc.InternalRowFormat$.collect(cachedSparkResults.scala:78)
        at 
org.apache.spark.sql.execution.qrc.ResultCacheManager.$anonfun$computeResult$1(ResultCacheManager.scala:549)
        at 
com.databricks.spark.util.FrameProfiler$.record(FrameProfiler.scala:94)
        at 
org.apache.spark.sql.execution.qrc.ResultCacheManager.collectResult$1(ResultCacheManager.scala:543)
        at 
org.apache.spark.sql.execution.qrc.ResultCacheManager.computeResult(ResultCacheManager.scala:560)
        at 
org.apache.spark.sql.execution.qrc.ResultCacheManager.$anonfun$getOrComputeResultInternal$1(ResultCacheManager.scala:401)
        at scala.Option.getOrElse(Option.scala:189)
        at 
org.apache.spark.sql.execution.qrc.ResultCacheManager.getOrComputeResultInternal(ResultCacheManager.scala:400)
        at 
org.apache.spark.sql.execution.qrc.ResultCacheManager.getOrComputeResult(ResultCacheManager.scala:319)
        at 
org.apache.spark.sql.execution.SparkPlan.$anonfun$executeCollectResult$1(SparkPlan.scala:586)
        at 
com.databricks.spark.util.FrameProfiler$.record(FrameProfiler.scala:94)
        at 
org.apache.spark.sql.execution.SparkPlan.executeCollectResult(SparkPlan.scala:583)
        at org.apache.spark.sql.Dataset.collectResult(Dataset.scala:3884)
        at org.apache.spark.sql.Dataset.collectFromPlan(Dataset.scala:4856)
        at org.apache.spark.sql.Dataset.$anonfun$head$1(Dataset.scala:3584)
        at 
org.apache.spark.sql.Dataset.$anonfun$withAction$3(Dataset.scala:4847)
        at 
org.apache.spark.sql.execution.QueryExecution$.withInternalError(QueryExecution.scala:1177)
        at 
org.apache.spark.sql.Dataset.$anonfun$withAction$2(Dataset.scala:4845)
        at 
org.apache.spark.sql.execution.SQLExecution$.$anonfun$withNewExecutionId0$10(SQLExecution.scala:473)
        at 
org.apache.spark.sql.execution.SQLExecution$.withSQLConfPropagated(SQLExecution.scala:759)
        at 
org.apache.spark.sql.execution.SQLExecution$.$anonfun$withNewExecutionId0$1(SQLExecution.scala:335)
        at org.apache.spark.sql.SparkSession.withActive(SparkSession.scala:1261)
        at 
org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId0(SQLExecution.scala:206)
        at 
org.apache.spark.sql.execution.SQLExecution$.withNewExecutionId(SQLExecution.scala:696)
        at org.apache.spark.sql.Dataset.withAction(Dataset.scala:4845)
        at org.apache.spark.sql.Dataset.head(Dataset.scala:3584)
        at org.apache.spark.sql.Dataset.take(Dataset.scala:3815)
        at org.apache.spark.sql.Dataset.getRows(Dataset.scala:437)
        at org.apache.spark.sql.Dataset.showString(Dataset.scala:473)
        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:397)
        at py4j.Gateway.invoke(Gateway.java:306)
        at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132)
        at py4j.commands.CallCommand.execute(CallCommand.java:79)
        at 
py4j.ClientServerConnection.waitForCommands(ClientServerConnection.java:199)
        at py4j.ClientServerConnection.run(ClientServerConnection.java:119)
        at java.base/java.lang.Thread.run(Thread.java:840)
   Caused by: java.lang.UnsupportedOperationException: Byte-buffer read 
unsupported by com.databricks.common.filesystem.LokiGCSInputStream
        at 
org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:160)
        at 
com.databricks.spark.metrics.FSInputStreamWithMetrics.$anonfun$read$1(FileSystemWithMetrics.scala:77)
        at 
com.databricks.spark.metrics.FSInputStreamWithMetrics.withTimeAndBytesReadMetric(FileSystemWithMetrics.scala:67)
        at 
com.databricks.spark.metrics.FSInputStreamWithMetrics.read(FileSystemWithMetrics.scala:77)
        at 
org.apache.hadoop.fs.FSDataInputStream.read(FSDataInputStream.java:156)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.util.H2SeekableInputStream$H2Reader.read(H2SeekableInputStream.java:82)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.util.H2SeekableInputStream.readFully(H2SeekableInputStream.java:91)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.util.H2SeekableInputStream.readFully(H2SeekableInputStream.java:76)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.ParquetFileReader.readFooter(ParquetFileReader.java:584)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.ParquetFileReader.<init>(ParquetFileReader.java:799)
        at 
org.apache.iceberg.shaded.org.apache.parquet.hadoop.ParquetFileReader.open(ParquetFileReader.java:666)
        at org.apache.iceberg.parquet.ReadConf.newReader(ReadConf.java:238)
        at org.apache.iceberg.parquet.ReadConf.<init>(ReadConf.java:81)
        at 
org.apache.iceberg.parquet.VectorizedParquetReader.init(VectorizedParquetReader.java:90)
        at 
org.apache.iceberg.parquet.VectorizedParquetReader.iterator(VectorizedParquetReader.java:99)
        at 
org.apache.iceberg.spark.source.BatchDataReader.open(BatchDataReader.java:109)
        at 
org.apache.iceberg.spark.source.BatchDataReader.open(BatchDataReader.java:41)
        at org.apache.iceberg.spark.source.BaseReader.next(BaseReader.java:143)
        at 
org.apache.spark.sql.execution.datasources.v2.PartitionIterator.hasNext(DataSourceRDD.scala:122)
        at 
org.apache.spark.sql.execution.datasources.v2.MetricsIterator.hasNext(DataSourceRDD.scala:160)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.$anonfun$hasNext$1(DataSourceRDD.scala:64)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.$anonfun$hasNext$1$adapted(DataSourceRDD.scala:64)
        at scala.Option.exists(Option.scala:376)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.hasNext(DataSourceRDD.scala:64)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.advanceToNextIter(DataSourceRDD.scala:99)
        at 
org.apache.spark.sql.execution.datasources.v2.DataSourceRDD$$anon$1.hasNext(DataSourceRDD.scala:64)
        at 
org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:37)
        at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:460)
        at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.columnartorow_nextBatch_0$(Unknown
 Source)
        at 
org.apache.spark.sql.catalyst.expressions.GeneratedClass$GeneratedIteratorForCodegenStage1.processNext(Unknown
 Source)
        at 
org.apache.spark.sql.execution.BufferedRowIterator.hasNext(BufferedRowIterator.java:43)
        at 
org.apache.spark.sql.execution.WholeStageCodegenEvaluatorFactory$WholeStageCodegenPartitionEvaluator$$anon$1.hasNext(WholeStageCodegenEvaluatorFactory.scala:50)
        at 
org.apache.spark.sql.execution.collect.UnsafeRowBatchUtils$.$anonfun$encodeUnsafeRows$5(UnsafeRowBatchUtils.scala:88)
        at 
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.sql.execution.collect.UnsafeRowBatchUtils$.$anonfun$encodeUnsafeRows$3(UnsafeRowBatchUtils.scala:88)
        at 
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.sql.execution.collect.UnsafeRowBatchUtils$.$anonfun$encodeUnsafeRows$1(UnsafeRowBatchUtils.scala:68)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.sql.execution.collect.UnsafeRowBatchUtils$.encodeUnsafeRows(UnsafeRowBatchUtils.scala:62)
        at 
org.apache.spark.sql.execution.collect.Collector.$anonfun$processFunc$2(Collector.scala:207)
        at 
org.apache.spark.scheduler.ResultTask.$anonfun$runTask$2(ResultTask.scala:76)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.scheduler.ResultTask.$anonfun$runTask$1(ResultTask.scala:76)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:62)
        at 
org.apache.spark.TaskContext.runTaskWithListeners(TaskContext.scala:227)
        at org.apache.spark.scheduler.Task.doRunTask(Task.scala:204)
        at org.apache.spark.scheduler.Task.$anonfun$run$5(Task.scala:166)
        at 
com.databricks.unity.EmptyHandle$.runWithAndClose(UCSHandle.scala:134)
        at org.apache.spark.scheduler.Task.$anonfun$run$1(Task.scala:160)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at org.apache.spark.scheduler.Task.run(Task.scala:105)
        at 
org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$11(Executor.scala:1171)
        at 
org.apache.spark.util.SparkErrorUtils.tryWithSafeFinally(SparkErrorUtils.scala:64)
        at 
org.apache.spark.util.SparkErrorUtils.tryWithSafeFinally$(SparkErrorUtils.scala:61)
        at org.apache.spark.util.Utils$.tryWithSafeFinally(Utils.scala:111)
        at 
org.apache.spark.executor.Executor$TaskRunner.$anonfun$run$3(Executor.scala:1175)
        at 
scala.runtime.java8.JFunction0$mcV$sp.apply(JFunction0$mcV$sp.java:23)
        at 
com.databricks.spark.util.ExecutorFrameProfiler$.record(ExecutorFrameProfiler.scala:110)
        at 
org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:1041)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at 
java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        ... 1 more
   File <command-7515452296121661>, line 2
         1 df = spark.sql("select * from bqms_table;");
   ----> 2 df.show()
   File 
/databricks/spark/python/lib/py4j-0.10.9.7-src.zip/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))


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