kafka create topic

;ImportKafka.admin.RackAwareMode;Importkafka.utils.ZkUtils; Public classKafkautil { Public Static voidcreatekafatopic (String zkstr,kafkatopicbean topic) {zkutils zkutils=zkutils. Apply (ZKSTR,30000, 30000, jaasutils.iszksecurityenabled ()); Adminutils.createtopic (Zkutils, Topic.gettopicname (), Topic.getpartition (), Topic.getreplication (), NewProperties (),Newrackawaremode.enforced$ ()); Zkutils.close (); } Public Static voiddeletekaf

Kafka is designed for the distributed environment, so if the log file can actually be understood as a message database, put in the same place, then will inevitably bring a decline in availability, a hang all, if the full amount of copies to all machines, then there is too much redundancy of data, and because each machine's disk size is limited , so even if there are more machines, the messages that can be processed are limited by the disk and cannot e

1. Use the command line method: [lch@linux129 bin]$./kafka-topics.sh--create--zookeeper hadoop221:2181,hadoop222:2181--replication-factor 2-- Partitions 2--topic test_ttt parameter description:--replication-factor: Indicates the number of copies, written here 2, indicating there will be two copies--partitions: indicates there will be two par Tition, shown in log

some time ago in the Kafka QQ Group was asked about this--about how Java consumer dynamically modify topic subscription issues. It's really a good question to think about it, because if you simply hold the consumer instance in another thread and then call subscribe to modify it, the consumer side will inevitably throw an exception Concurrentmodificationexception:kafkaconsumer is isn'tsafe for multi-threade

Kafka Cluster management, state saving is realized through zookeeper, so we should build zookeeper cluster first Zookeeper Cluster setup First, the SOFTWARE environment: The zookeeper cluster requires more than half of the node to survive to be externally serviced, so the number of servers should be 2*n+1, where 3 node is used to build the zookeeper cluster. 1.3 Linux servers are created using the Docker container, and the IP address isnodea:172.17.0

Create a Kafka theme, connect to the ZK cluster, copy factor 3, partition 3, subject name is test111[Email protected] kafka]# bin/kafka-topics.sh--create--zookeeper h5:2181--topic test111--replication-factor 3--part Itions 3View K

Create a Kafka theme, connect to the ZK cluster, copy factor 3, partition 3, subject name is test111[Email protected] kafka]# bin/kafka-topics.sh--create--zookeeper h5:2181--topic test111--replication-factor 3--part Itions 3View K

　　　　Description of the error:Under the Kafka installation directory, execute $ bin/zookeeper-server-start.sh config/zookeeper.properties Unrecognized VM option ' usecompressedoops 'Error:clould not create the Java vritual machine.ERROR:A Fatal exception has occurres. Program would exit.　　Workaround:Locate bin/kafka-run-class.sh file, use Vim to open, this versio

Add a radio radio button to the Phpcms v9 topic, you can create different columns for content editing, and add a custom field to the topic.

1.2.Locate the special_add.tpl.php and special_edit.tpl.php files in Phpcms\modules\special\templatesAdd in special_add.tpl.phpspecial_edit.tpl.php3. Add the Type2 field in the database table ' phpcms_special '4. Template callFeatured Templates Home{Loop $types $t}{if $t [' name '] = = "Introduction"}{pc:special action= "content_list" specialid= "$id" typeid= "$t [typeid]" listorder= "3" num= "999"}{Loop $data $r}{/loop}{/PC}{/if}{/loop}Add a radio radio button to the Phpcms v9

number of text and text content. if one or two official posts cannot carry a large number of content, we need to report topics on the activity. when we need to make important announcements on an activity, when we need to expand the forum, we need to publicize the pre-announcement topic. when advertisers want to plan and package their own products and services on the Special Topics page, they need to use the ad promotion

ModernUI Tutorial: create a custom topic, modernui custom Modern ui wpf includes two built-in themes (dark and light ). In version 1.0.3, you can build custom themes. Modern UI applications are usually defined in the global resource dictionary App. xaml as follows: The "/FirstFloor. ModernUI; component/Assets/ModernUI. xaml" dictionary contains the Modern UI style of the core WPF controls (such as Button

Source: http://www.windowsphonegeek.com/articles/Creating-WP7-Custom-Theme-ndash-Basic-Theme-Implementation I will start with a length of 3ArticleSeries-"create WP7 custom themes". In this series, I will explain everything you need to know about the silvelight for Windows Phone 7 theme. First, I will start with a simple color-based example, and then I will verify how to implement a complex topic that cont

judgment functions are explained as follows: Is_home (): Returns true if the current page is the home page Is_category (): Returns true if the current page is a category page. Is_single (): Returns true if the current page is a single article page Is_page (): Returns true if the current page is a single page For more information, see WordPress documentation: condition tag Therefore, if you want to create a

It is actually a bit difficult to say "make" Ubuntu, but it was just modified. First look at the effect: If you like a theme without borders, you no longer have to wait for the author of your favorite theme to make it for you, you just need to modify a few parameters. 1. find the folder of the topic you want to modify in the/usr/share/themes directory (sometimes the window border used by the topic is not ne

The previous topic diagram only associates with the External table and does not filter data based on Attribute conditions. There is no better sample program on the Internet, so I have crashed the iServer several times, the following are the key code for success. : // Link VaR joinitem = new Supermap. Rest. joinitem ({Foreigntablename: "v_region_land ",Joinfilter: "bbs_parcel.cadastralno = v_region_land.cadastralno ",Jointype: "innerjoin"}); // Single

interfaces defined in Cbaseurlrule. [Cbaseurlrule::createurl () |createurl ()] [Cbaseurlrule::p Arseurl () |parseurl ()] In addition to this typical usage, custom URL rule classes can have other uses. For example, we can write a rule class to record requests for URL parsing and uel creation. This is useful for Web sites that are under development. We can also write a rule class to display a custom 404 page when the other URL rules fail. Note that this usage requires the rule class

In the previous tutorial, we have only completed index. php: This file can be used on the homepage or archive pages such as categories and tags. in this tutorial, we will create a specific article page-Single-page document template, if we don't have one, but the page template is single. php In the previous tutorial, we have only completed index. php: This file can be used on the homepage or archive pages such as categories and tags. in this tutorial,

The search function of inove themes is actually a little poor. Therefore, inove supports custom search. We use Google Custom Search to enhance the search function of inove themes to increase the user experience. The following describes how to add a Google Custom Search function for an inove topic. 1. log on to Google Custom Search and create your custom search. (X hundred characters are omitted here) 2.

In the previous tutorial (5), we put the header code common to all template files in one file (header. php), in the same way, our bottom information, such as the copyright statement, is basically shared by all pages. In the previous tutorial (5), we put the header code common to all template files in one file (header. php), in the same way, our bottom information, such as the copyright statement, is basically shared by all pages, so we also extract this part of code and put it in a separate PHP