Get partitions and cores Use an rdd method to get the number of DataFrame partitions df = spark.read.parquet(eventsPath)
df.rdd.getNumPartitions() Access SparkContext through SparkSession to get the number of cores or slots SparkContext is also provi...
问题描述: org.apache.dubbo.rpc.RpcException: Failed to invoke the method getUserInfo in the service com.api.service.user.UserService. No provider available for the com.api.service.user.UserService from registry localhost:9090 on the consumer local...
今天在写基于MongoDB,freemarker和springboot结合的项目中,出现了以下问题 找不到对应id,但是我本身没有用到 ‘_id’,‘id’?这两个属性, rg.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name ...
1 具体报错为: Error:(16, 0) Gradle DSL method not found: 'runProguard()' Possible causes:<ul><li>The project 'App' may be using a version of Gradle that does not contain the method. <a href="openGradleSetting...
这几天写测试用例,测试的时候出了error java.lang.IllegalStateException: instance must be started before calling this method 分析下原因本地测试的时候引用了dubbo服务,注册中心用的zk,zk 客户端使用的是 Apache 的 Curator 具体问题栈如下 java....
项目场景: 在进行hive建表的时候出现的问题 FAILED: SemanticException [Error 10014]: Line 23:68 Wrong arguments ‘sau_kpimrcnt’: No matching method for class org.apache.hadoop.hive.ql.udf.generic.GenericUDFOPDivide with (bigint, boolean) 问题描述...
1. 文章信息 本次介绍的文章是在2022年发表在Electronics的一篇文章,文章题目为《Fire Detection Method in Smart CityEnvironments Using a Deep-Learning-Based Approach》,用计算机视觉的方法对城市进行火灾检测。 2. 摘要 在新型智慧城市建设中,可...