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Jacek Laskowski

Rating
1525.89 (22,827th) 		Reputation
48,121 (2,126th)
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Title Δ
How to find first non-null values in groups? (secondary sorting usi... 0.00
How to select columns not in GROUP BY clause or aggregate function? 0.00
How to max per column with nulls that should be replaced (with 0)? +0.51
How important are data types to memory in Spark/Scala? 0.00
How to explode by using a column value? +0.50
How to max value and keep all columns (for max records per group)? +0.50
How to use values (as Column) in function (from functions object) w... -1.07
How to use values (as Column) in function (from functions object) w... -1.07
How to convert bytes column (with logicaltype as decimal) in Avro t... 0.00
How to use modified Spark MLlib module as dependency? 0.00
How to access RDDs that are supposed to be cached from the DAGSched... -1.66
How to submit Spark SQL application with parameter used in SQL stat... -0.03
Why does using cache on streaming Datasets fail with "Analysis... 0.00
How to recompile examples using Spark project's sources? 0.00
How to use DataFrames within SparkListener? 0.00
How to change job/stage description in web UI? 0.00
How to use Dataset-based transformation in Spark Streaming? 0.00
Why does dcos package fail with "URL is unreachable: Max retri... 0.00
How to measure execution time of Spark GraphX application? 0.00
How does Spark manage stages? 0.00
Why does sortBy transformation trigger a Spark job? -1.72
How to remove the parentheses around records when saveAsTextFile on... +2.13
Why Spark application on YARN fails with FetchFailedException due t... 0.00
How to log in foreachRDD in streaming application? 0.00
Spark fat jar to run multiple versions on YARN +0.00
What is and how to control Memory Storage in Executors tab in web UI? 0.00
How to control Spark application per task/stage/job attempt? 0.00
What is "WARN ParallelCollectionRDD: Spark does not support ne... 0.00
What memory do spark.*.memory properties control - RAM or disk? 0.00
How to run Spark Streaming application on Windows 10? 0.00
How to persist a DataFrame to a Hive table? 0.00
How to save mllib.recommendation.MatrixFactorizationModel into HDFS? 0.00
How to submit Spark application to YARN in cluster mode? -0.01
Why does Spark Streaming app with Kafka fail with "ClassNotFou... +0.15
Why does sbt assembly in Spark project fail with "Please add a... +0.50
How to execute async operations (i.e. returning a Future) from map/... 0.00
How to use DataFrame.explode with a custom UDF to split a string in... 0.00
When could Resource Manager report "AM Release Container"... 0.00
Why does my Spark Streaming application not print the number of rec... 0.00
What are ThreadPoolExecutors jobs in web UI? 0.00
How to update a DataFrame given another DataFrame with the values f... 0.00
Why would one use DataFrame.select over DataFrame.rdd.map (or vice... -0.00
How to re-train models on new batches only (without taking the prev... 0.00
How to compute the largest value in a column using withColumn? +0.55
How to run SQL queries on tables defined on streaming data asynchro... 0.00
How to update column based on a condition (a value in a group)? +1.27
Why does Zeppelin 0.6.2 notebook fail with "The input line is... 0.00
Why does running exported jar file give "Exception in thread &... +0.50
How to broadcast data from MySQL and use it in streaming batches? 0.00
Why would Spark Streaming application stall when consuming from Kaf... 0.00