connector

Ignore Nulls with Data frame using spark datastax connector

由 久未见 提交于 2019-12-11 05:14:03
问题 We have a Cassandra schema with more than 50 columns and we are inserting data into it from multiple data sources by transforming the data using Spark (Data frames not rdd). We are running into the issue of many tombstones as our data is sparse. Already tried the spark.cassandra.output.ignoreNulls=true but its not working. What would be right config to not write null values in cassandra? I am using zeppelin to run my spark code and push data to C* 回答1: Figured out the solution to this: A hint

C++ store a modified MySQL timestamp as string

由 孤街醉人 提交于 2019-12-11 04:18:45
问题 I am currently trying to get a DATETIME key value from a MySQL database and save it as a string. However I dont want the time to be in the usual MySQL format YYYY-MM-DD HH:MM:SS but rather in a 12 hour format like this: HH:MM:SS AM/PM I already figured out how to "convert" the time format in the MySQL database to my desired format by using this: sql::ResultSet* time = database->Query("SELECT DATE_FORMAT(`lastLogin`, '%r') FROM `users` WHERE `user_id`='%i', id); the MySQL command is valid and

How to build and use flink-connector-kinesis?

由 丶灬走出姿态 提交于 2019-12-10 16:34:11
问题 I'm trying to use Apache Flink with AWS kinesis. The document says that I have to build the connector on my own. Therefore, I build the connector and added the jar file for my project and also, I put the dependency on my pom.xml file. <dependency> <groupId>org.apache.flink</groupId> <artifactId>flink-connector-kinesis_2.11</artifactId> <version>1.6.1</version> </dependency> However, when I tried to build using mvn clean package I got an error message like this [INFO] -----------------------<

How to import data from mongodb to apache solr using mongo-connector

由 二次信任 提交于 2019-12-10 15:46:46
问题 I am new to apache solr. I want to import data from mongodb to solr using mongo-connector for my search application. I followed steps from https://github.com/mongodb-labs/mongo-connector/wiki/Getting-Started. I created replicaSet and replicaSet is running fine. I have also installed mongo-connector using pip install but when issue the following command: mongo-connector -m localhost:27017 -t http://localhost:8983/solr -d solr_doc_manager its not working. It is stuck at Logging to mongo

how to install mysqlconnecter java correctly?

由 生来就可爱ヽ(ⅴ＜●) 提交于 2019-12-10 10:36:23
问题 after surfing the web I realized that I should set the class path the path File of the connecter jar file in system environment variables I did so and in commandline by entering this command I have this: C:\Users\User>echo %classpath% D:\classpath\mysql-connector-java-5.1.22-bin.jar but when I wrote a java program to show me the class path: System.out.println(System.getProperty("java.class.path")); it shows me this one: C:\Users\User\Documents\NetBeansProjects\JavaApplication3\build\classes;C

What is the Simplest Tomcat/Apache Connector (Windows)?

由 我们两清 提交于 2019-12-10 10:16:02
问题 I have apache 2.2 and tomcat 5.5 running on a Windows XP machine. Which tomcat/apache connector is the easiest to set up and is well documented? 回答1: mod_proxy_ajp would be the easiest to use if you are using Apache 2.2. It is part of the Apache distribution so you don't need to install any additional software. In your httpd.conf you need to make sure that mod_proxy and mod_proxy_ajp are loaded: LoadModule proxy_module modules/mod_proxy.so LoadModule proxy_ajp_module modules/mod_proxy_ajp.so

How to obtain Apache mod_jk connector for for RHL?

由 守給你的承諾、 提交于 2019-12-08 23:11:44
I am looking for a mod_jk.so for Apache 2.4.6 on RHEL linux, could not find anywhere. Tried to build from source that did not go through as well. Any one knows the correct location to download or any worked solution to build? thanks Vasu Here is step by step installation of mod_jk # mkdir mod-jk # wget http://www.eu.apache.org/dist/tomcat/tomcat-connectors/jk/tomcat-connectors-1.2.41-src.tar.gz # tar -xf tomcat-connectors-1.2.41-src.tar.gz # yum install -y httpd-devel gcc gcc-c++ make libtool # cd tomcat-connectors-1.2.41-src/native # ./configure --with-apxs=/usr/sbin/apxs # make # libtool -

stop\start connector within my code

由 偶尔善良 提交于 2019-12-08 05:28:43
问题 I need to stop and then start the https connector programmatically. In tomcat 6 the following scrap of code works fine: final ObjectName objectNameQuery = new ObjectName("*:type=Connector,port=443,*"); MBeanServer mbeanServer = null; ObjectName objectName = null; for (final MBeanServer server : (List<MBeanServer>) MBeanServerFactory.findMBeanServer(null)) { if (server.queryNames(objectNameQuery, null).size() > 0) { mbeanServer = server; objectName = (ObjectName) server.queryNames

MySQL Connector for C++ | MySQL_Connection::setReadOnly() exception on setSchema

由 China☆狼群 提交于 2019-12-07 18:35:24
问题 I am writing a server-emu software for a not-so-popular mmorpg game, and I'm using mysql connector for c++ to connect with my database. After I reinstalled Windows (and my whole dev environment) I've got a weird mysql connector exception. The code I use to connect with the database looks like this: try { this->driver = get_driver_instance(); std::cout << "SQL Driver Name: " << this->driver->getName() << std::endl; std::cout << "Connecting as " << user << "@" << host << " using password " <<

【原创】基于 MySQL Connector/C 实现客户端程序之 API 总结

由 自闭症网瘾萝莉.ら 提交于 2019-12-06 15:38:15
【 关于 mysql_query() 】 下面是官网对于 mysql_query() 的说明。 === 【 22.8.7.52. mysql_query() 】 int mysql_query(MYSQL *mysql, const char *stmt_str) 功能： 执行由 stmt_str 指定的 NULL 结尾的 SQL 语句。通常情况下，由 stmt_str 指定的内容是单条 SQL 语句，且结尾没有分号 ";" 或者 "\g" 。如果使能了多语句执行功能，那么由 stmt_str 指定的内容可以包含多条由分号分隔的语句； mysql_query() 不能正确应用于包含二进制数据的语句 ，必须使用 mysql_real_query() 替代；（二进制数据中可能包含 "\0" 字符，会被 mysql_query() 按串结束符理解） 如果你想知道执行后是否返回了结果集，你可以使用 mysql_field_count() 来检查； 如果执行成功，则返回 0 ；非 0 为失败。 错误码： CR_COMMANDS_OUT_OF_SYNC Commands were executed in an improper order. CR_SERVER_GONE_ERROR The MySQL server has gone away. CR_SERVER_LOST The
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