Flink 1.9 Table API问题读取kafka

小咪咪 2024-04-18 10:45 50阅读 0赞

# Flink 1.9 API问题 #

# [Flink: Could not find a suitable table factory for 'org.apache.flink.table.factories.DeserializationSchemaFactory' in the classpath][Flink_ Could not find a suitable table factory for _org.apache.flink.table.factories.DeserializationSchemaFactory_ in the classpath] #

kafka数据格式：

\{"user\_id": "346146", "item\_id":"851377", "category\_id": "4789432", "behavior": "pv", "ts": "2017-11-26T01:24:19Z"\}

错误原因就是环境变量 跟 依赖的原因 ，目前我只是简单的做了实验，本地代码是可以运行的。

1，先上一个1.62版本的代码，可以运行：

package com.coder.flink.core.table;
    
    
    import org.apache.flink.api.common.typeinfo.Types;
    import org.apache.flink.streaming.api.datastream.DataStream;
    import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
    import org.apache.flink.table.api.Table;
    import org.apache.flink.table.api.TableEnvironment;
    import org.apache.flink.table.api.java.StreamTableEnvironment;
    import org.apache.flink.table.descriptors.Json;
    import org.apache.flink.table.descriptors.Kafka;
    import org.apache.flink.table.descriptors.Schema;
    import org.apache.flink.types.Row;
    
    
    public class TestDemo {
        public static void main(String[] args) {
    
            StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment();
            env.setParallelism(1);
    //        env.enableCheckpointing(5000);
            StreamTableEnvironment tableEnv = TableEnvironment.getTableEnvironment(env);
    
            Kafka kafka = new Kafka()
                    .version("0.10")
                    .topic("user_behavior")
                    .property("bootstrap.servers", "node2.hadoop:9092")
                    .property("zookeeper.connect", "node2.hadoop:2181");
            tableEnv.connect(kafka)
                    .withFormat(
                            new Json().failOnMissingField(true).deriveSchema()
                    )
                    .withSchema(
                            new Schema()
                                    .field("user_id", Types.INT)
                                    .field("item_id", Types.INT)
                                    .field("category_id", Types.INT)
                                    .field("behavior", Types.STRING)
                                    .field("ts", Types.STRING)
                    )
                    .inAppendMode()
                    .registerTableSource("tmp_table");
    
            String sql = "select * from tmp_table";
            Table table = tableEnv.sqlQuery(sql);
            DataStream<Row> rowDataStream = tableEnv.toAppendStream(table, Row.class);
            rowDataStream.print();
            table.printSchema();
    
            try {
                env.execute();
            } catch (Exception e) {
                e.printStackTrace();
            }
    
        }
    
    }

2，Flink 1.9的版本

1）需要注意的是 tableEnv的创建

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMxODY2Nzkz_size_16_color_FFFFFF_t_70][]

2）官网说了连接kafka 需要2个依赖，坑就在这里，我加入了这两个依赖都不行，需要手动导入，并且注释掉依赖

[https://ci.apache.org/projects/flink/flink-docs-release-1.9/dev/table/connect.html\#json-format][https_ci.apache.org_projects_flink_flink-docs-release-1.9_dev_table_connect.html_json-format]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMxODY2Nzkz_size_16_color_FFFFFF_t_70 1][]

3）手动导入到项目里面

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMxODY2Nzkz_size_16_color_FFFFFF_t_70 2][]

3）代码如下

package com.learning.sql;
    
    import org.apache.flink.api.common.typeinfo.Types;
    import org.apache.flink.streaming.api.datastream.DataStream;
    import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
    import org.apache.flink.table.api.EnvironmentSettings;
    import org.apache.flink.table.api.Table;
    import org.apache.flink.table.api.java.StreamTableEnvironment;
    import org.apache.flink.table.descriptors.Json;
    import org.apache.flink.table.descriptors.Kafka;
    import org.apache.flink.table.descriptors.Schema;
    import org.apache.flink.types.Row;
    
    
    
    public class TestDemo {
        
        public static void main(String[] args) {
    
    
            StreamExecutionEnvironment bsEnv = StreamExecutionEnvironment.getExecutionEnvironment();
            EnvironmentSettings bsSettings = EnvironmentSettings.newInstance().useBlinkPlanner().inStreamingMode().build();
            StreamTableEnvironment tableEnv = StreamTableEnvironment.create(bsEnv, bsSettings);
            Kafka kafka = new Kafka()
                    .version("0.10")
                    .topic("user_behavior")
                    .property("bootstrap.servers", "node2.hadoop:9092")
                    .property("zookeeper.connect", "node2.hadoop:2181")
                    .startFromLatest();
    
            tableEnv.connect(kafka)
                    .withFormat(
                            new Json().failOnMissingField(true).deriveSchema()
                    )
                    .withSchema(
                            new Schema()
                                    .field("user_id", Types.INT)
                                    .field("item_id", Types.INT)
                                    .field("category_id", Types.INT)
                                    .field("behavior", Types.STRING)
                                    .field("ts", Types.STRING)
                    )
                    .inAppendMode()
                    .registerTableSource("test")  ;
    
    
    
    
            String sql = "select * from test";
            Table table = tableEnv.sqlQuery(sql);
            DataStream<Row> dataStream = tableEnv.toAppendStream(table, Row.class);
            table.printSchema();
            dataStream.print();
    //        tEnv.registerTable("a",table);
    //        tEnv.explain(table);
    
    
          /*  CsvTableSink sink = new CsvTableSink(
                    "C:\\Users\\Administrator\\Desktop\\",                  // output path
                    "|",                   // optional: delimit files by '|'
                    1,                     // optional: write to a single file
                    FileSystem.WriteMode.OVERWRITE);  // optional: override existing files
    
            tableEnv.registerTableSink(
                    "csvOutputTable",
                    // specify table schema
                    new String[]{"f0", "f1","f2", "f3","f4"},
                    new TypeInformation[]{Types.INT, Types.INT,Types.INT, Types.STRING,Types.STRING},
                    sink);*/
            try {
    //            table.insertInto("csvOutputTable");
                tableEnv.execute("aa");
            } catch (Exception e) {
                e.printStackTrace();
            }
    
        }
    
    }

4）如果还是报错的话 可能就是你的环境问题了，或者jar包的问题，这个得仔细，附上 依赖：

>     <?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>com.github.wuchong</groupId>
>         <artifactId>flink-sql-submit</artifactId>
>         <version>1.0-SNAPSHOT</version>
>     
>         <properties>
>             <flink.version>1.9.0</flink.version>
>         </properties>
>     
>         <dependencies>
>             
>             
>             <dependency>
>                 <groupId>org.apache.flink</groupId>
>                 <artifactId>flink-clients_2.11</artifactId>
>                 <version>${flink.version}</version>
>                 
>             </dependency>
>     
>            
>     
>             <dependency>
>                 <groupId>org.apache.flink</groupId>
>                 <artifactId>flink-table-api-java-bridge_2.11</artifactId>
>                 <version>1.9.0</version>
>                 
>             </dependency>
>             <dependency>
>                 <groupId>org.apache.flink</groupId>
>                 <artifactId>flink-streaming-scala_2.11</artifactId>
>                 <version>1.9.0</version>
>                 
>             </dependency>
>             <dependency>
>                 <groupId>org.apache.flink</groupId>
>                 <artifactId>flink-table-common</artifactId>
>                 <version>1.9.0</version>
>                 
>             </dependency>
>     
>     
>          
>     
>             <dependency>
>                 <groupId>org.apache.flink</groupId>
>                 <artifactId>flink-table-api-java</artifactId>
>                 <version>${flink.version}</version>
>                 
>             </dependency>
>             <dependency>
>                 <groupId>org.apache.flink</groupId>
>                 <artifactId>flink-table-planner-blink_2.11</artifactId>
>                 <version>${flink.version}</version>
>                 
>             </dependency>
>     
>             <dependency>
>                 <groupId>org.apache.flink</groupId>
>                 <artifactId>flink-table-planner_2.11</artifactId>
>                 <version>${flink.version}</version>
>                 
>             </dependency>
>     
>             <dependency>
>                 <groupId>org.apache.flink</groupId>
>                 <artifactId>flink-jdbc_2.11</artifactId>
>                 <version>${flink.version}</version>
>                 
>             </dependency>
>     
>     
>     
>         </dependencies>
>     
>         <build>
>             <plugins>
>                 <plugin>
>                     <groupId>org.apache.maven.plugins</groupId>
>                     <artifactId>maven-compiler-plugin</artifactId>
>                     <version>3.8.0</version>
>                     <configuration>
>                         <source>1.8</source>
>                         <target>1.8</target>
>                         
>                         <useIncrementalCompilation>false</useIncrementalCompilation>
>                         <compilerArgs>
>                             
>                             <arg>-Xpkginfo:always</arg>
>                         </compilerArgs>
>                     </configuration>
>                 </plugin>
>     
>                 <plugin>
>                     <groupId>org.apache.maven.plugins</groupId>
>                     <artifactId>maven-shade-plugin</artifactId>
>                     <executions>
>                         <execution>
>                             <id>flink-sql-submit</id>
>                             <phase>package</phase>
>                             <goals>
>                                 <goal>shade</goal>
>                             </goals>
>                             <configuration>
>                                 <finalName>flink-sql-submit</finalName>
>                                 <transformers>
>                                     <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
>                                         <mainClass>com.github.wuchong.sqlsubmit.SqlSubmit</mainClass>
>                                         
>                                     </transformer>
>                                 </transformers>
>                             </configuration>
>                         </execution>
>                     </executions>
>                 </plugin>
>     
>             </plugins>
>         </build>
>     
>     </project>

[Flink_ Could not find a suitable table factory for _org.apache.flink.table.factories.DeserializationSchemaFactory_ in the classpath]: https://stackoverflow.com/questions/52500048/flink-could-not-find-a-suitable-table-factory-for-org-apache-flink-table-facto
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMxODY2Nzkz_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/f9811445251e4727a46d6819c639f8ef.png
[https_ci.apache.org_projects_flink_flink-docs-release-1.9_dev_table_connect.html_json-format]: https://ci.apache.org/projects/flink/flink-docs-release-1.9/dev/table/connect.html#json-format
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMxODY2Nzkz_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/af9ae9c82ef54e62a56666002de0e198.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzMxODY2Nzkz_size_16_color_FFFFFF_t_70 2]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/18/24af7181cefa4cc3ac726e035d08b2b6.png