kafka java example

Filebeat.modules:-Module:kafkaLogEnabled:trueFilebeat.prospectors:-Type:logEnabled:truePaths-/opt/logs/jetty/xxx.logFieldsName:study_logsonlineType:javalogsonlineip_lan:xxx.xxx.xxx.xxIp_wan:xxx.xxx.xxx.xxxMultiline.pattern: ' ^\d{4}-\d{1,2}-\d{1,2}\s\d{1,2}:\d{1,2}:\d{1,2} 'Multiline.negate:trueMultiline.match:afterName:xxxxOutput.kafka:Enabled:trueHosts: ["kafka-1.xxx.com:9092", "kafka-2.xxx.com:9092", "

Java Connection Kafka operation, stand-alone version Kafka The code is recorded as follows 1. Maven Add Dependency configuration: 2, Java code implementation: Package Com.sam.project.kafka; Import Java.util.Iterator; Import java.util.List; Import Java.util.Map; Import java.util.Properties; Import Java.util.c

Reference: https://www.jianshu.com/p/9e72b3942c59The reason is Num.patitions = 1 in the Kafka cluster kafka/config/server.properties file. The partition default value needs to be modified.Partitions the number of partitions nodes created by default when creating topic, only the newly created topic takes effect, and all tries to set a reasonable value at the time of project planning. You can also dynamically

). This option provides the lowest latency but the weakest durability guarantees (some data would be lost when a server fails) .1, which means that the producer gets a acknowledgement after the leader replica have received the data. This option provides better durability as the client waits until the server acknowledges the request as successful (only M Essages that were written to the Now-dead leader and not yet replicated would be lost).-1, which means that the producer gets a acknowledgement

: FastdfsDatabase connection pool: Alibaba Druid 1.0Core Framework: Spring frameworkSecurity framework: Apache Shiro 1.2View Frame: Spring MVC 4.0Server-side validation: Hibernate Validator 5.1Layout frame: Sitemesh 2.4Workflow Engine: Activiti 5.15Task Scheduler: Quartz 1.8.5Persistence Layer Framework: MyBatis 3.2Log management: slf4j 1.7, log4jTool classes: Apache Commons, Jackson 2.2, Xstream 1.4, dozer 5.3, POI2. Front-endJS Frame: JQuery 1.9.CSS Framework: Bootstrap 4 MetronicClient-side v

Depend on: Kafka_2.12-2.0.0.jar, Kafka-clients-2.0.0.jar, Log4j-1.2.17.jar, Slf4j-api-1.7.25.jar, Slf4j-log4j12-1.7.25.jar Lkafkaconstants.java Packagekafka_proj; Public Interfaceikafkaconstants { Public StaticString kafka_brokers = "192.168.65.130:9092"; //Public static String kafka_brokers = "192.168.65.130:9092, 192.168.65.131:9092, 192.168.65.132:9092"; Public StaticInteger Message_count = 1000; Public StaticString client_

Error phenomenon:Java client programming as the consumer of Kafka, connecting Kafka's broker error650) this.width=650; "Src=" https://s4.51cto.com/wyfs02/M00/91/6A/wKiom1j12BGgUkKgAACUSA5Q0tU565.png-wh_500x0-wm_ 3-wmp_4-s_64493172.png "title=" Qq20170418170758.png "alt=" Wkiom1j12bggukkgaacusa5q0tu565.png-wh_50 "/>Error reason analysis:When the server configuration or network environment is poor, there will be a connection ZK time-out situation occurs

, "Org.apache.kafka.common.serialization.StringDeserializer"); -Props.put (Commonclientconfigs.security_protocol_config, "Sasl_plaintext"); - inkafkaconsumerNewKafkaconsumer(props); - //Topic Name:test9 toConsumer.subscribe (Collections.singleton ("Test9")); + while(true) { -Consumerrecords); the for(Consumerrecordrecord:records) *System.out.printf ("offset =%d, key =%s, value =%s%n", Record.offset (), Record.key (), Record.value ()); $ }Panax Notoginseng

frame: jQuery1.9.CSS Framework: Bootstrap 4 MetronicClient authentication: Jqueryvalidation Plugin.Rich Text: CkecitorFile Management: CkfinderDynamic tab: JerichotabData table: Jqgriddialog box: JQuery jboxTree structure controls: JQuery ZtreeOther components: Bootstrap 4 metronic3. SupportServer middleware: Tomcat 6, 7, Jboss 7, WebLogic 10, WebSphere 8Database support: Currently only support MySQL database, but not limited to the database, the next version of the upgrade multi-data source sw

Kafka Uniform Hair data function:ImportOrg.apache.kafka.clients.producer.KafkaProducer;ImportOrg.apache.kafka.clients.producer.ProducerRecord;Importjava.io.Serializable;Importjava.util.List;Importjava.util.Properties; Public classKafkasendutilImplementsserializable{ Public Static voidSendmsg (String brokerlist,string topic,listdatas) {Properties Properties=NewProperties (); Properties.put ("Bootstrap.servers", brokerlist); Properties.put ("Key.seriali

The Kafka version I use is: 0.7.2 The JDK version is: 1.6.0_20 Http://kafka.apache.org/07/quickstart.html The official example is not very complete, the following code is my supplement and can be run after compiling. Producer Code [Java] View Plain copy importjava.util.*; importkafka.message.message; Import kafka.producer.ProducerConfig; importkafka.javaapi.pro

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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

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public class Kafkaproducerdemo {public static void main (string[] args) throws Interruptedexception {/* Properties props = New Properties (); * Props.put ("Bootstrap.servers", "localhost:9092"); * Props.put ("ACKs", "all"); * Props.put ("retries", 0); * Props.put ("batch.size", 16384); * Props.put ("linger.ms", 1); * Props.put ("buffer.memory", 33554432); * Props.put ("Key.serializer", "Org.apache.kafka.common.serialization.StringSerializer"); * Props.put ("Value.serializer", "Org.apache.kafka.c

)); Stringdecoder Keydecoder = new Stringdecoder (new Verifiableproperties ());Stringdecoder Valuedecoder = new Stringdecoder (new Verifiableproperties ()); MapConsumer.createmessagestreams (Topiccountmap,keydecoder,valuedecoder);kafkastreamConsumeriterator int messagecount = 0;while (It.hasnext ()) {System.out.println (It.next (). message ());messagecount++;if (Messagecount = = 100) {SYSTEM.OUT.PRINTLN ("Consumer end of the total consumption of" + Messagecount + "Message! ");}}} public static v

frame: jQuery1.9.CSS Framework: Bootstrap 4 MetronicClient authentication: Jqueryvalidation Plugin.Rich Text: CkecitorFile Management: CkfinderDynamic tab: JerichotabData table: Jqgriddialog box: JQuery jboxTree structure controls: JQuery ZtreeOther components: Bootstrap 4 metronic3. SupportServer middleware: Tomcat 6, 7, Jboss 7, WebLogic 10, WebSphere 8Database support: Currently only support MySQL database, but not limited to the database, the next version of the upgrade multi-data source sw

frame: jQuery1.9.CSS Framework: Bootstrap 4 MetronicClient authentication: Jqueryvalidation Plugin.Rich Text: CkecitorFile Management: CkfinderDynamic tab: JerichotabData table: Jqgriddialog box: JQuery jboxTree structure controls: JQuery ZtreeOther components: Bootstrap 4 metronic3. SupportServer middleware: Tomcat 6, 7, Jboss 7, WebLogic 10, WebSphere 8Database support: Currently only support MySQL database, but not limited to the database, the next version of the upgrade multi-data source sw

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;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 voiddeletekafatopic (String zkstr,kafkatopicbean topic) {z