I am trying to write a simple vanilla collaborative filtering application, running on Google Cloud Dataproc. The Data is located in BigQuery. I have implemented this according to this tutorial: https://cloud.google.com/dataproc/docs/tutorials/bigquery-sparkml
Now the problem is that when running this (slightly modified) example I get an IllegalStateException. More specifically here is the stacktrace:
17/09/25 10:55:37 ERROR org.apache.spark.scheduler.TaskSetManager: Task 0 in stage 0.0 failed 4 times; aborting job
Traceback (most recent call last):
File "/tmp/af84ad68-0259-4ca1-b464-a118a96f0742/marketing-pages-collaborative-filtering.py", line 109, in <module>
compute_recommendations()
File "/tmp/af84ad68-0259-4ca1-b464-a118a96f0742/marketing-pages-collaborative-filtering.py", line 59, in compute_recommendations
conf=conf)
File "/usr/lib/spark/python/lib/pyspark.zip/pyspark/context.py", line 646, in newAPIHadoopRDD
File "/usr/lib/spark/python/lib/py4j-0.10.3-src.zip/py4j/java_gateway.py", line 1133, in __call__
File "/usr/lib/spark/python/lib/pyspark.zip/pyspark/sql/utils.py", line 63, in deco
File "/usr/lib/spark/python/lib/py4j-0.10.3-src.zip/py4j/protocol.py", line 319, in get_return_value
py4j.protocol.Py4JJavaError: An error occurred while calling z:org.apache.spark.api.python.PythonRDD.newAPIHadoopRDD.
: 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, marketing-pages-collaborative-filtering-w-1.c.dg-dev-personalization.internal): java.lang.IllegalStateException: Found known file 'data-000000000002.json' with index 2, which isn't less than or equal to than endFileNumber 1!
at com.google.cloud.hadoop.repackaged.com.google.common.base.Preconditions.checkState(Preconditions.java:197)
at com.google.cloud.hadoop.io.bigquery.DynamicFileListRecordReader.setEndFileMarkerFile(DynamicFileListRecordReader.java:327)
at com.google.cloud.hadoop.io.bigquery.DynamicFileListRecordReader.nextKeyValue(DynamicFileListRecordReader.java:177)
at org.apache.spark.rdd.NewHadoopRDD$$anon$1.hasNext(NewHadoopRDD.scala:182)
at org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:39)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:389)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104)
at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48)
at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:310)
at scala.collection.AbstractIterator.to(Iterator.scala:1336)
at scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:302)
at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1336)
at scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:289)
at scala.collection.AbstractIterator.toArray(Iterator.scala:1336)
at org.apache.spark.rdd.RDD$$anonfun$take$1$$anonfun$29.apply(RDD.scala:1324)
at org.apache.spark.rdd.RDD$$anonfun$take$1$$anonfun$29.apply(RDD.scala:1324)
at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1899)
at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1899)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
at org.apache.spark.scheduler.Task.run(Task.scala:86)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Driver stacktrace:
at org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1454)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1442)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1441)
at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:48)
at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1441)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:811)
at org.apache.spark.scheduler.DAGScheduler$$anonfun$handleTaskSetFailed$1.apply(DAGScheduler.scala:811)
at scala.Option.foreach(Option.scala:257)
at org.apache.spark.scheduler.DAGScheduler.handleTaskSetFailed(DAGScheduler.scala:811)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.doOnReceive(DAGScheduler.scala:1667)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1622)
at org.apache.spark.scheduler.DAGSchedulerEventProcessLoop.onReceive(DAGScheduler.scala:1611)
at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48)
at org.apache.spark.scheduler.DAGScheduler.runJob(DAGScheduler.scala:632)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:1873)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:1886)
at org.apache.spark.SparkContext.runJob(SparkContext.scala:1899)
at org.apache.spark.rdd.RDD$$anonfun$take$1.apply(RDD.scala:1324)
at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:151)
at org.apache.spark.rdd.RDDOperationScope$.withScope(RDDOperationScope.scala:112)
at org.apache.spark.rdd.RDD.withScope(RDD.scala:358)
at org.apache.spark.rdd.RDD.take(RDD.scala:1298)
at org.apache.spark.api.python.SerDeUtil$.pairRDDToPython(SerDeUtil.scala:203)
at org.apache.spark.api.python.PythonRDD$.newAPIHadoopRDD(PythonRDD.scala:582)
at org.apache.spark.api.python.PythonRDD.newAPIHadoopRDD(PythonRDD.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 py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:237)
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.IllegalStateException: Found known file 'data-000000000002.json' with index 2, which isn't less than or equal to than endFileNumber 1!
at com.google.cloud.hadoop.repackaged.com.google.common.base.Preconditions.checkState(Preconditions.java:197)
at com.google.cloud.hadoop.io.bigquery.DynamicFileListRecordReader.setEndFileMarkerFile(DynamicFileListRecordReader.java:327)
at com.google.cloud.hadoop.io.bigquery.DynamicFileListRecordReader.nextKeyValue(DynamicFileListRecordReader.java:177)
at org.apache.spark.rdd.NewHadoopRDD$$anon$1.hasNext(NewHadoopRDD.scala:182)
at org.apache.spark.InterruptibleIterator.hasNext(InterruptibleIterator.scala:39)
at scala.collection.Iterator$$anon$11.hasNext(Iterator.scala:408)
at scala.collection.Iterator$$anon$10.hasNext(Iterator.scala:389)
at scala.collection.Iterator$class.foreach(Iterator.scala:893)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1336)
at scala.collection.generic.Growable$class.$plus$plus$eq(Growable.scala:59)
at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:104)
at scala.collection.mutable.ArrayBuffer.$plus$plus$eq(ArrayBuffer.scala:48)
at scala.collection.TraversableOnce$class.to(TraversableOnce.scala:310)
at scala.collection.AbstractIterator.to(Iterator.scala:1336)
at scala.collection.TraversableOnce$class.toBuffer(TraversableOnce.scala:302)
at scala.collection.AbstractIterator.toBuffer(Iterator.scala:1336)
at scala.collection.TraversableOnce$class.toArray(TraversableOnce.scala:289)
at scala.collection.AbstractIterator.toArray(Iterator.scala:1336)
at org.apache.spark.rdd.RDD$$anonfun$take$1$$anonfun$29.apply(RDD.scala:1324)
at org.apache.spark.rdd.RDD$$anonfun$take$1$$anonfun$29.apply(RDD.scala:1324)
at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1899)
at org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1899)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:70)
at org.apache.spark.scheduler.Task.run(Task.scala:86)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:274)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
... 1 more
17/09/25 10:55:37 INFO org.spark_project.jetty.server.ServerConnector: Stopped ServerConnector@1dfdb336{HTTP/1.1}{0.0.0.0:4040}
ERROR: (gcloud.dataproc.jobs.submit.pyspark) Job [af84ad68-0259-4ca1-b464-a118a96f0742] entered state [ERROR] while waiting for [DONE].
I think I have identified the problem, but I cannot find the cause of the problem. The relevant code snippet is this:
table_rdd = spark.sparkContext.newAPIHadoopRDD(
"com.google.cloud.hadoop.io.bigquery.JsonTextBigQueryInputFormat",
"org.apache.hadoop.io.LongWritable",
"com.google.gson.JsonObject",
conf=conf)
table_json = table_rdd.map(lambda x: x[1])
visit_data = sparkSession.read.json(table_json)
First I create the RDD according to the tutorial from Google. The next step is to extract the JSON elements from the RDD, and this then is read into a table, that we can query.
The stacktrace shows that the exception happens when assigning conf, but the code works until I call sparkSession.read.json(table_json) because as I understood it spark works lazily and only then tries to access the actual JSON files that were exported from BigQuery.
Now the problem is that Spark finds more JSON files than there should be. According to this comment in the code of the BigQuery Hadoop Library, even if everything fits into one shard, the minimum is two, such that BigQuery recognizes the export as such. Also it says there that it generates a so called end-marker file, which as far as I can say, is just an empty JSON file.
But when running the code the export that is generated by BigQuery has more than the 2 necessary files (1 containing data and 1 as the end-marker). It generates up to 5 JSON files, that sometimes contain just 1 or 2 rows from BigQuery.
I am pretty sure that this is the problem, that the export somehow is wrong. But I cannot find out why this happens and how to fix it. Any help is appreciated.
UPDATE:
I tried something else. I deleted the table in BigQuery and populated it again from scratch. This solved the problem with the export. There are only two files now. But I think the problem still persists. I will try adding some rows via Cloud Functions (which would happen in my application) and then update on the behaviour.
UPDATE 2:
So after waiting a day and adding some rows via streaming inserts using a Cloud Function, the issue happens again. Somehow the exports are partitioned by day. That would not be a problem if each day gets its own shard, but this does not happen unfortunately.
