无法让Cassandra在基本应用程序中工作

时间：2013-10-23 10:00:50

标签： java cassandra pom.xml datastax-java-driver

这是我当前的错误：

com.datastax.driver.core.exceptions.NoHostAvailableException: All host(s) tried for query failed (tried: /127.0.0.1 (com.datastax.driver.core.TransportException: [/127.0.0.1] Unexpected exception triggered (java.lang.NoClassDefFoundError: Could not initialize class com.datastax.driver.core.Codec)))
    com.datastax.driver.core.ControlConnection.reconnectInternal(ControlConnection.java:186)
    com.datastax.driver.core.ControlConnection.connect(ControlConnection.java:81)
    com.datastax.driver.core.Cluster$Manager.init(Cluster.java:773)
    com.datastax.driver.core.Cluster$Manager.access$100(Cluster.java:706)
    com.datastax.driver.core.Cluster.<init>(Cluster.java:79)
    com.datastax.driver.core.Cluster.<init>(Cluster.java:66)
    com.datastax.driver.core.Cluster$Builder.build(Cluster.java:687)
    com.t2.claims.persistence.CassandraClient.getOrCreateCluster(CassandraClient.java:12)
    com.t2.claims.persistence.CassandraClient.getOrCreateSession(CassandraClient.java:18)
    com.t2.claims.dao.AlertDaoImpl.findAll(AlertDaoImpl.java:25)
    com.t2.claims.controllers.AlertIndexController.doAfterCompose(AlertIndexController.java:36)
    org.zkoss.zk.ui.impl.UiEngineImpl.doAfterCompose(UiEngineImpl.java:529)
    ....

我觉得我正在导入我需要的所有可用的人工制品（以及许多我不想试图克服这个问题）。

我只是无法理解为什么这不起作用？

这是我pom.xml的完整性：

<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/maven-v4_0_0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.t2.claims</groupId>
<artifactId>T2ClaimsPortal</artifactId>
<packaging>war</packaging>
<version>1.0-SNAPSHOT</version>
<name>T2ClaimsPortal</name>

<properties>
    <spring.version>3.2.0.RELEASE</spring.version>
    <zk.version>6.0.2.1</zk.version>
    <commons-lang.version>2.4</commons-lang.version>
    <commons-fileupload.version>1.2.1</commons-fileupload.version>
    <commons-io.version>1.3.1</commons-io.version>
    <commons-logging.version>1.1.1</commons-logging.version>
</properties>

<repositories>
    <repository>
        <id>spring-milestone</id>
        <name>Spring Maven MILESTONE Repository</name>
        <url>http://maven.springframework.org/milestone</url>
    </repository>

    <repository>
        <id>ZK EE</id>
        <url>https://maven.zkoss.org/repo/zk/ee/</url>
    </repository>
</repositories>


<dependencies>

    <!-- Hector -->

    <dependency>
        <groupId>me.prettyprint</groupId>
        <artifactId>hector-core</artifactId>
        <version>0.8.0-2</version>
    </dependency>

    <!-- cassandra -->

    <dependency>
        <groupId>com.datastax.cassandra</groupId>
        <artifactId>cassandra-driver-core</artifactId>
        <version>1.0.4</version>
    </dependency>

    <!-- cassandra dependencies -->

    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-api</artifactId>
        <version>1.5.5</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>1.5.5</version>
        <scope>runtime</scope>
    </dependency>
    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>14.0.1</version>
    </dependency>
    <dependency>
        <groupId>com.yammer.metrics</groupId>
        <artifactId>metrics-core</artifactId>
        <version>2.2.0</version>
    </dependency>
    <dependency>
        <groupId>io.netty</groupId>
        <artifactId>netty</artifactId>
        <version>3.7.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.apache.cassandra</groupId>
        <artifactId>cassandra-all</artifactId>
        <version>1.2.9</version>
    </dependency>
    <dependency>
        <groupId>org.apache.thrift</groupId>
        <artifactId>libthrift</artifactId>
        <version>0.7.0</version>
    </dependency>
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-core-asl</artifactId>
        <version>1.9.2</version>
    </dependency>
    <dependency>
        <groupId>org.testng</groupId>
        <artifactId>testng</artifactId>
        <version>6.8.1</version>
    </dependency>

    <!-- spring framework -->

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-expression</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-beans</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-aop</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-context-support</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-tx</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-jdbc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-orm</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-oxm</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc-portlet</artifactId>
        <version>${spring.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.integration</groupId>
        <artifactId>spring-integration-core</artifactId>
        <version>2.2.6.RELEASE</version>
    </dependency>

    <!-- ZK -->

    <dependency>
        <groupId>org.zkoss.zk</groupId>
        <artifactId>zkplus</artifactId>
        <version>${zk.version}</version>
    </dependency>
    <dependency>
        <groupId>org.zkoss.zk</groupId>
        <artifactId>zkspring-core</artifactId>
        <version>3.1</version>
    </dependency>
    <dependency>
        <groupId>org.zkoss.theme</groupId>
        <artifactId>sapphire</artifactId>
        <version>${zk.version}</version>
    </dependency>
    <dependency>
        <groupId>org.zkoss.zk</groupId>
        <artifactId>zul</artifactId>
        <version>${zk.version}</version>
    </dependency>
    <dependency>
        <groupId>org.zkoss.common</groupId>
        <artifactId>zcommon</artifactId>
        <version>${zk.version}</version>
    </dependency>
    <dependency>
        <groupId>org.zkoss.zk</groupId>
        <artifactId>zk</artifactId>
        <version>${zk.version}</version>
    </dependency>
    <dependency>
        <groupId>org.zkoss.common</groupId>
        <artifactId>zweb</artifactId>
        <version>${zk.version}</version>
    </dependency>

    <!-- ZK dependencies -->

    <dependency>
        <groupId>commons-logging</groupId>
        <artifactId>commons-logging</artifactId>
        <version>${commons-logging.version}</version>
    </dependency>
    <dependency>
        <groupId>commons-fileupload</groupId>
        <artifactId>commons-fileupload</artifactId>
        <version>${commons-fileupload.version}</version>
    </dependency>
    <dependency>
        <groupId>commons-lang</groupId>
        <artifactId>commons-lang</artifactId>
        <version>${commons-lang.version}</version>
    </dependency>
    <dependency>
        <groupId>commons-io</groupId>
        <artifactId>commons-io</artifactId>
        <version>${commons-io.version}</version>
    </dependency>
    <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
        <version>3.2.1</version>
    </dependency>
    <dependency>
        <groupId>commons-codec</groupId>
        <artifactId>commons-codec</artifactId>
        <version>1.7</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-io</artifactId>
        <version>1.3.2</version>
    </dependency>
    <dependency>
        <groupId>commons-configuration</groupId>
        <artifactId>commons-configuration</artifactId>
        <version>1.6</version>
        <type>jar</type>
        <scope>compile</scope>
    </dependency>

    <!-- javax servlet -->

    <dependency>
        <groupId>javax.servlet</groupId>
        <artifactId>servlet-api</artifactId>
        <version>2.5</version>
    </dependency>

    <dependency>
        <groupId>javax.servlet.jsp</groupId>
        <artifactId>jsp-api</artifactId>
        <version>2.1</version>
        <scope>provided</scope>
    </dependency>

    <!-- ***************************************************************************** -->
    <!-- ************************** JACKSON ****************************************** -->
    <!-- ***************************************************************************** -->
    <dependency>
        <groupId>org.codehaus.jackson</groupId>
        <artifactId>jackson-mapper-asl</artifactId>
        <version>1.9.10</version>
    </dependency>
    <dependency>
        <groupId>com.fasterxml.jackson.core</groupId>
        <artifactId>jackson-databind</artifactId>
        <version>2.0.2</version>
    </dependency>

    <dependency>
        <groupId>joda-time</groupId>
        <artifactId>joda-time</artifactId>
        <version>2.1</version>
    </dependency>


    <dependency>
        <groupId>org.jgroups</groupId>
        <artifactId>jgroups</artifactId>
        <version>3.2.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-math</artifactId>
        <version>2.0</version>
    </dependency>

    <!-- test -->

    <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-test</artifactId>
        <version>${spring.version}</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>junit</groupId>
        <artifactId>junit</artifactId>
        <version>4.8.2</version>
        <scope>test</scope>
    </dependency>

    <dependency>
        <groupId>org.apache.openjpa</groupId>
        <artifactId>openjpa</artifactId>
        <version>2.2.0</version>
    </dependency>

    <dependency>
        <groupId>org.hectorclient</groupId>
        <artifactId>hector-core</artifactId>
        <version>1.1-4</version>
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>com.datastax.cassandra</groupId>
        <artifactId>cassandra-driver-core</artifactId>
        <version>1.0.4</version>
    </dependency>

    <dependency>
        <groupId>org.hectorclient</groupId>
        <artifactId>hector-object-mapper</artifactId>
        <version>3.1-09</version>
        <exclusions>
            <exclusion>
                <groupId>org.slf4j</groupId>
                <artifactId>slf4j-log4j12</artifactId>
            </exclusion>
        </exclusions>
    </dependency>

    <dependency>
        <groupId>com.sun.jersey</groupId>
        <artifactId>jersey-client</artifactId>
        <version>1.8</version>
    </dependency>

    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpclient</artifactId>
        <version>4.2</version>
    </dependency>

    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>fluent-hc</artifactId>
        <version>4.2</version>
    </dependency>

    <dependency>
        <groupId>org.apache.httpcomponents</groupId>
        <artifactId>httpcore</artifactId>
        <version>4.2</version>
    </dependency>

    <dependency>
        <groupId>org.jboss.netty</groupId>
        <artifactId>netty</artifactId>
        <version>3.2.9.Final</version>
    </dependency>
    <dependency>
        <groupId>org.apache.curator</groupId>
        <artifactId>curator-recipes</artifactId>
        <version>2.2.0-incubating</version>
    </dependency>
</dependencies>

<build>
    <finalName>T2ClaimsPortal</finalName>
    <plugins>
        <plugin>
            <artifactId>maven-compiler-plugin</artifactId>
            <configuration>
                <source>1.6</source>
                <target>1.6</target>
            </configuration>
        </plugin>
        <plugin>
            <artifactId>maven-surefire-plugin</artifactId>
            <configuration>
                <includes>
                    <include>**/*Tests.java</include>
                </includes>
            </configuration>
        </plugin>
    </plugins>
</build>

有人可以让我理解为什么我会得到这个例外吗？我有一个本地运行的cassandra客户端。 （版本1.2.11）。

4 个答案:

答案 0 :(得分：4)

这不是你的pom文件的问题。您的客户端（DataStax Java驱动程序）无法访问您的cassandra数据库。可能是因为几个原因：

  • 检查您正在使用的节点的地址。
  • 同时检查端口，Cassandra本机二进制协议的默认端口为9042.

此处提供更多信息：http://www.datastax.com/documentation/developer/java-driver/1.0/webhelp/index.html#java-driver/quick_start/qsSimpleClientCreate_t.html

答案 1 :(得分：1)

我在虚拟机上安装了Cassandra Server，但我无法远程访问它。我获得了例外：

com.datastax.driver.core.exceptions.NoHostAvailableException: 
All host(s) tried for query failed (tried: /192.168.1.76:9042 (com.datastax.driver.core.TransportException: [/192.168.1.76:9042] Cannot connect))

首先，我确认无法通过telnet访问端口9042。

我解决了在Cassandra Server上修改cassandra.yaml配置文件的问题，

rpc_address = 0.0.0.0
broadcast_rpc_address = 1.2.3.4

那是因为

rpc_address（或rpc_interface）用于客户端连接， listen_address属性用于节点间通信。

答案 2 :(得分：0)

您的cassandara服务器似乎没有收听您的请求。     试试telnet 127.0.0.1 9160

如果你得到这个     telnet：无法连接到远程主机：连接被拒绝 对于jdbc库使用DataStax驱动程序，它更成熟，无bug 

<dependency>
<groupId>org.apache-extras.cassandra-jdbc</groupId>
<artifactId>cassandra-jdbc</artifactId>
<version>1.2.5</version>
</dependency>

然后重启你的cassandara

答案 3 :(得分：0)

问题太相似了：我的Spring应用程序因NoHostAvailable而失败，我可以通过在配置文件cassandra.yaml中设置rpc_port和native_transport_port来匹配它，以匹配用于连接到cassandra的eaxct IP地址（即Cluster。 builder（）。addContactPoints（...这里的IP地址......）），但后来它是cqlsh，因为主机没有监听而不再启动...直到我意识到听众（rpc或本地传输）正在监听在127.0.0.1上，否则是主机的真正的IP 10.0.0.5，这在这个实现中有点不同！所以我通过调整cqlsh脚本以使用10.0.0.5并获得解析为127.0.0.1而不是10.0.0.5的localhost名称的rif来解决它...这不符合最初的IP网络原则来建立一个终端应用程序做出这样的改变。

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