Dear All, I am very new to HBase and HBase snapshot. I want to ask a question regarding the HBase Snapshot. So, when I take an HBase snapshot of a table. Does this snapshot continuously track the changes of this table? If it is not, which mean that I need to continuously delete the old snapshot and take a new snapshot like once a week, right? Thanks, Bin Ye ... View more

Dear All, May I ask a question about the software architecture. I want to build an image recognition application with apache spark. my original thining is that: 1. spring boot(RESTful API)-receive an image 2. spring boot send the image to spark 3. spark process the image and send the result to spring boot 4. spring boot send to users. Is this a good way to develop such application? are there any examples I can find? ... View more

Hi, i manually installed hadoop 2.7.4 However, namenode never start. i can see datanode and secondrynamenode are starting. the core_site.xml <property> <name>hadoop.tmp.dir</name> <value>/home/hduser/tmp</value> <description>A base for other temporary directories.</description> </property> <property> <name>fs.default.name</name> <value>hdfs://evotion00:54310</value> </property> the hdfs_site.xml <property> <name>dfs.replication</name> <value>3</value> <description>Default block replication. The actual number of replications can be specified when the file is created. The default is used if replication is not specified in create time. </description> </property> <property> <name>dfs.name.dir</name> <value>file:/home/hduser/hadoop_store/hdfs/namenode</value> </property> <property> <name>dfs.data.dir</name> <value>file:/home/hduser/hadoop_store/hdfs/datanode</value> </property> I tried, hadoop namenode -format and restart but not working. Many thanks in advance. ... View more

Hi All, I need to store username and password in Phoenix HBase and this table needs to be encrypted. I want to ask, is there any example or any materials I can read? Bin Ye ... View more

HI, I have a spring boot application. It can run on localhost. but when you deploy a war file on the server. It can not start and generate errors: SLF4J: Class path contains multiple SLF4J bindings. SLF4J: Found binding in [jar:file:/home/binye/.m2/repository/ch/qos/logback/logback-classic/1.1.11/logback-classic-1.1.11.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: Found binding in [jar:file:/home/binye/.m2/repository/org/slf4j/slf4j-log4j12/1.7.25/slf4j-log4j12-1.7.25.jar!/org/slf4j/impl/StaticLoggerBinder.class] SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder] However, i could not find which one is conflict. My pom.xml is below: <?xml version="1.0" encoding="UTF-8"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>org.evotion.datarepository</groupId> <artifactId>datarepository</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <name>datarepository</name> <description>Data repository</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.4.RELEASE</version> <!-- <relativePath /> lookup parent from repository --> </parent> <properties> <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding> <!-- <start-class>org.evotion.datarepository.ServletInitializer.java</start-class> --> <java.version>1.8</java.version> </properties> <dependencies> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jersey</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-tomcat</artifactId> <scope>provided</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <dependency> <groupId>org.apache.phoenix</groupId> <artifactId>phoenix-core</artifactId> <version>4.10.0-HBase-1.2</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jdbc</artifactId> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project> Please helpe me. ... View more