附加到一個數據框架
要添加到一個數據幀，使用union方法。%scala val firstDF = spark.range(3).toDF("myCol") val newRow = Seq(20) val appendded = firstDF.union(newRow.toDF()) display(appendded) %python firstDF = spark.range(3).toDF("myCol") newRow = spark.createDataFrame([[20]]) appendded = firstDF.union(newRow) display(appendded)…
簡化鏈式轉換
有時候你可能需要在你的DataFrame上執行多個轉換:_ import org.apache.spark.sql.DataFrame val testDf =(1到10). todf ("col") def func0(x: Int => Int, y: Int)(in: DataFrame): DataFrame = {in. apache.spark.sql.DataFrame val testDf =(1到10). todf ("col") def func0(x: Int => Int, y: Int)filter('col > x(y))} def func1(x: Int)(in: DataFrame): DataFrame = {in.sele…
某些文件中的模式不兼容
Spark job在讀取Parquet文件時出現如下異常而失敗:Error in SQL statement: SparkException: job aborted due to stage failure: Task 20 in stage 11227.0 failed 4 times, most recent failure: Lost Task 20.3 in stage 11227.0 (TID 868031, 10.111.245.219, executor 31): java.lang.UnsupportedOperationException: org.…
無法讀取WASB文件係統中的文件和列表目錄
當你嚐試用Spark在WASB上讀取文件時，你會得到以下異常:org.apache.spark.SparkException: Job aborted due to stage failure: Task 0 in stage 1.0 failed 4 times，最近的失敗:Lost Task 0.3 in stage 1.0 (TID 19, 10.139.64.5, executor 0): shaded.databricks.org.apache.hadoop.fs.azure.AzureException: com.microsoft.a…
Apache Spark會話在DBConnect中為空
當你得到sparkSession is null錯誤消息時，你正在嚐試使用Databricks Connect (AWS | Azure | GCP)運行你的代碼。java.lang.AssertionError: assertion failed: sparkSession is null while trying to executeCollectResult at scala.Predef$.assert(Predef.scala:170) at org.apache.spark.sql. execukplan .executeCollectResult(…
將Delta Lake表寫入S3時，對象鎖定錯誤
您正在嚐試對S3桶執行Delta寫操作，並得到一個錯誤消息。com.amazonaws.services.s3.model。亞馬遜S3Exception: Content-MD5 HTTP header is required for Put Part requests with Object Lock parameters Cause Delta Lake does not support S3 buckets with object lock enabled. Solution You should use an S3 bucket that do...
Delta Lake UPDATE查詢失敗，出現IllegalState異常
當你執行一個Delta Lake UPDATE, DELETE，或MERGE查詢，在它的任何轉換中使用Python udf，它會失敗，出現以下異常:AWS java.lang.UnsupportedOperationException: Error in SQL statement: IllegalStateException: File (s3a://xxx/table1) to be rewrite not found among candidate files: s3a://xxx/table1/part-000…
在Databricks Runtime 6.4上安裝最新版PyStan失敗
您試圖在Databricks Runtime 6.4 Extended Support集群上安裝PyStan PyPi包，並得到ManagedLibraryInstallFailed錯誤消息。java.lang.RuntimeException: ManagedLibraryInstallFailed: org.apache.spark.SparkException: Process List(/databricks/python/bin/pip, install, pystan，——disable-pip-version-check) exited wit…
在集群上安裝Cartopy時出錯
您正在嚐試在集群上安裝Cartopy，並收到ManagedLibraryInstallFailed錯誤消息。java.lang.RuntimeException: ManagedLibraryInstallFailed: org.apache.spark.SparkException: Process List(/databricks/python/bin/pip, install, cartopy==0.17.0，——disable-pip-version-check) exited with code 1。ERROR: Command ERROR out…
擬合Apache SparkML模型會拋出錯誤
問題Databricks在擬合SparkML模型或Pipeline時拋出錯誤:org.apache.spark.SparkException: Job aborted to stage failure: Task 0 in stage 162.0 failed 4次，最近的失敗:Lost Task 0.3 in stage 162.0 (TID 168, 10.205.250.130, executor 1): org.apache.spark.SparkException: failed to execute user - defined function($anonfu…
H2O。ai氣泡水集群不可達
問題你在嚐試初始化H2O。當你得到H2OClusterNotReachableException錯誤消息時，ai 's Sparkling Water on Databricks Runtime 7.0及以上。%python導入ai.h2o.sparkling。_ val h2oContext = h2oContext . getorcreate () ai.h2o. sparkle .backend.exceptions。H2OClusterNotReachableException: H2O cluster X.X.X.X:54321 - sparkle -water-ro…
KNN模型使用pyfunc返回ModuleNotFoundError或FileNotFoundError
你已經使用KNeighborsClassifier創建了一個Sklearn模型，並使用pyfunc來運行預測。例如:%python import mlflow。Pyfunc pyfunc_udf = mlflow.pyfunc。Spark_udf (spark, model_uri=model_uri, result_type='string') predicted_df = merge。withColumn(" forecast "， pyfunc_udf(*merge.columns[1:])) predicted_df.collect()
訪問MLflow實驗工件時出現PERMISSION_DENIED錯誤
當您試圖使用MLflow客戶端訪問MLflow工件時，您會得到一個PERMISSION_DENIED錯誤。RestException: PERMISSION_DENIED: User < User > does not have permission to 'View' experiment with id < experimental -id> or RestException: PERMISSION_DENIED: User < User > does not have permission to 'Edit' experiment with id
RStudio服務器後端連接錯誤
當使用RStudio服務器時，出現後端連接錯誤。係統錯誤。setenv(EXISTING_SPARKR_BACKEND_PORT = system(paste0("wget - qo - 'http://localhost:6061/?type=\"com.databricks.backend.common.rpc.DriverMessages$StartRStudioSparkRBackend\"'——post-data='{\"@class\":\"com.databricks.backend.common.rpc.DriverMessages$StartRStudioSparkRB…
開啟AQE時出現間歇性NullPointerException
在保存數據時，你會得到一個間歇性的NullPointerException錯誤。Py4JJavaError:調用o2892.save時發生錯誤。: java.lang.NullPointerException at org.apache.spark.sql. execute . adaptive.optimizeskewedjoin .$anonfun$getMapSizesForReduceId$1(OptimizeSkewedJoin.scala:167) at org.apache.spark.sql. executive.adaptive ....