dremio jdbc使用

驱动包地址

链接：https://pan.baidu.com/s/1Nivkvze24hRH8pXOQleCgw
提取码：gp9z

使用dremio主要原因 ：

1）springboot提供了es组件，前期先使用的boot提供的es模板查询数据，但是发现组装数据很麻烦。最致命的是在分组数据统计的时候，每个查询条件就需要循环一遍数据，网上找了很多资料都是循环遍历数据这样感觉效率太低。

2）由于ELK多半用于数据统计报表展现，并不支持数据导出（有可能支持反正没有找到好的方法），所以es里的数据通过dremio的导出

dremio 还支持支持数据csv或者json导出数据 。

api连接代码如下：

  public static void jdbcDremio(){
        String JDBC_DRIVER = "com.dremio.jdbc.Driver";
        String DB_URL = "jdbc:dremio:direct=172.16.220.135:31010";//浏览器访问端口号9047 ，但是api端口号是31010
        String USER = "";
        String PASS = "";

        String sql ="  SELECT goodsName,count(orderSn) as totalSaleNum " +
                " FROM vem_order_info as order_info group by goodsName order by count(orderSn) desc ";

        try {
            Class.forName(JDBC_DRIVER);
            Connection cc =  DriverManager.getConnection(DB_URL, USER, PASS);
            PreparedStatement ps = cc.prepareStatement(sql);
            ResultSet resultSet = ps.executeQuery();
            while (resultSet.next()) {
                System.out.println("------------------");
                System.out.println(resultSet.getObject(1));
            }
            resultSet.close();
             ps.close();
            cc.close();

        } catch (Exception e) {
            e.printStackTrace();
        }

    }

开始使用dremio的一些小坑：

1. 如上api的调用的默认端口和浏览器默认端口是不一致的，主要错误信息并没有提示有关端口号相关内容，排查也是一个难啊！

   10:06:58.018 [Client-1] DEBUG cdjd.io.netty.util.Recycler - -Dio.netty.recycler.maxCapacity.default: 32768
   10:06:58.018 [Client-1] DEBUG cdjd.io.netty.util.Recycler - -Dio.netty.recycler.maxSharedCapacityFactor: 2
   10:06:58.018 [Client-1] DEBUG cdjd.io.netty.util.Recycler - -Dio.netty.recycler.linkCapacity: 16
   10:06:58.018 [Client-1] DEBUG cdjd.io.netty.util.Recycler - -Dio.netty.recycler.ratio: 8
   10:06:58.056 [Client-1] ERROR cdjd.com.dremio.exec.rpc.RpcExceptionHandler - Exception in RPC communication.  Connection: null <--> null (user client).  Closing connection.
   cdjd.io.netty.handler.codec.CorruptedFrameException: Expected to read a tag of 10 but actually received a value of 84.  Happened after reading 0 message.
       at cdjd.com.dremio.exec.rpc.MessageDecoder.checkTag(MessageDecoder.java:209)
       at cdjd.com.dremio.exec.rpc.MessageDecoder.decodeMessage(MessageDecoder.java:130)
       at cdjd.com.dremio.exec.rpc.MessageDecoder.decode(MessageDecoder.java:103)
       at cdjd.com.dremio.sabot.rpc.user.UserProtobufLengthDecoder.decode(UserProtobufLengthDecoder.java:35)
       at cdjd.io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:491)
       at cdjd.io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:430)
       at cdjd.io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:267)
       at cdjd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356)
       at cdjd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342)
       at cdjd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:335)
       at cdjd.io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86)
       at cdjd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356)
       at cdjd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342)
       at cdjd.io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:335)
       at cdjd.io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1294)
       at cdjd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:356)
       at cdjd.io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:342)
       at cdjd.io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:911)
       at cdjd.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:131)
       at cdjd.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645)
       at cdjd.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:580)
       at cdjd.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:497)
       at cdjd.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459)
       at cdjd.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:131)
       at java.lang.Thread.run(Thread.java:748)
   10:06:58.073 [Client-1] INFO cdjd.com.dremio.sabot.rpc.user.UserClient - [USER]: Channel closed null <--> null (user client)
   10:06:58.074 [Client-1] DEBUG cdjd.com.dremio.exec.rpc.BasicClient - Failure while initiating handshake
   cdjd.com.dremio.exec.rpc.ChannelClosedException: [USER]: Channel closed null <--> null (user client)
       at cdjd.com.dremio.exec.rpc.RpcBus$ChannelClosedHandler.operationComplete(RpcBus.java:157)

2. api前期使用了es组件之后那么导入springboot版本和使用的es组件版本冲突错误信息如下：

   2019-01-22 15:42:44.308  WARN 11600 --- [           main] ConfigServletWebServerApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'elasticsearchClient' defined in class path resource [org/springframework/boot/autoconfigure/data/elasticsearch/ElasticsearchAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.elasticsearch.client.transport.TransportClient]: Factory method 'elasticsearchClient' threw exception; nested exception is java.lang.BootstrapMethodError: java.lang.NoClassDefFoundError: org/elasticsearch/common/transport/InetSocketTransportAddress
   2019-01-22 15:42:44.309  INFO 11600 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Unregistering JMX-exposed beans on shutdown
   2019-01-22 15:42:44.314  INFO 11600 --- [           main] o.apache.catalina.core.StandardService   : Stopping service [Tomcat]
   
   Process finished with exit code 1

   pom配置信息：

     <groupId>org.elasticsearch.client</groupId>
               <artifactId>x-pack-transport</artifactId>
               <version>6.5.4</version>
           </dependency>
           <dependency>
               <groupId>org.elasticsearch.plugin</groupId>
               <artifactId>core</artifactId>
               <version>6.5.4</version>
           </dependency>
           <dependency>
               <groupId>org.elasticsearch</groupId>
               <artifactId>elasticsearch</artifactId>
               <version>6.5.4</version>
           </dependency>
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-web</artifactId>
           </dependency>
   
           <dependency>
               <groupId>org.projectlombok</groupId>
               <artifactId>lombok</artifactId>
               <optional>true</optional>
           </dependency>
           <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-test</artifactId>
               <scope>test</scope>
           </dependency>
   
         <!--  <dependency>
               <groupId>org.springframework.boot</groupId>
               <artifactId>spring-boot-starter-data-elasticsearch</artifactId>
           </dependency>-->  

   由于后面直接使用dremio -sql ，es-sql就用不到了，直接将spring-boot-starter-data-elasticsearch 删除就好了。