弗林克错误:java.lang.nosuchmethoderror:org.apache.flink.api.table

Question

我正在尝试使用Flink的表和SQL API进行一个简单的示例，在该示例中，我从文件中读取字符串，将其转换为Tuple2并尝试将其插入表格。这是我的代码。

import org.apache.flink.api.common.functions.FlatMapFunction;
import org.apache.flink.api.java.table.StreamTableEnvironment;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.api.table.Table;
import org.apache.flink.streaming.api.TimeCharacteristic;
import org.apache.flink.streaming.api.datastream.DataStream;
import org.apache.flink.streaming.api.environment.StreamExecutionEnvironment;
import org.apache.flink.util.Collector;
public class table_streaming_test
{
    public static void main (String[] args) throws Exception
    {
        StreamExecutionEnvironment env = StreamExecutionEnvironment.getExecutionEnvironment(); //create execution environment
        StreamTableEnvironment tEnv= StreamTableEnvironment.getTableEnvironment(env); 
        env.setParallelism(1);
        DataStream<String> datastream_in= env.readTextFile("file:/home/rishikesh/new_workspace1/table_streaming/stocks.txt");
         DataStream<Tuple2<String,Integer>> ds=  datastream_in
             .flatMap(new Splitter());  // transformation flatmap
         Table msg=tEnv.fromDataStream(ds).as("symbol,price");
         Table result = msg.select("symbol ='A'");
         DataStream<String> ds2 =tEnv.toDataStream(result, String.class);
         ds2.print();
         env.execute();
    }
public static class Splitter implements FlatMapFunction<String,     Tuple2<String, Integer>> {
        public void flatMap(String sentence, Collector<Tuple2<String, Integer>> out) throws Exception {
            String[] token= sentence.split(",");
            out.collect(new Tuple2<String, Integer>(token[0],Integer.parseInt(token[1])));
        }
    }
}

错误如下：（发生在DataStream<String> ds2 =tEnv.toDataStream(result, String.class);线上）

log4j:WARN No appenders could be found for logger (org.apache.flink.api.java.typeutils.TypeExtractor).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
Exception in thread "main" java.lang.NoSuchMethodError: org.apache.flink.api.table.Table.<init>(Lorg/apache/flink/api/table/TableEnvironment;Lorg/apache/flink/api/table/plan/logical/LogicalNode;)V
    at org.apache.flink.api.table.StreamTableEnvironment.ingest(StreamTableEnvironment.scala:97)
    at org.apache.flink.api.java.table.StreamTableEnvironment.fromDataStream(StreamTableEnvironment.scala:61)
    at table_streaming_test.main(table_streaming_test.java:87)

jar文件包括：

1. flink-dist_2.10-1.1.3.3.jar
2. flink-python_2.10-1.1.3.3.jar
3. flink-table_2.10-1.1.3.3.jar
4. log4j-1.2.17.jar
5. slf4j-log4j12-1.7.7.7.jar
6. Javase-1.7

javase-1.7

Answer 1

错误的一个可能原因"

对我来说，我的版本为1.4.2，我使用的版本为1.3.2。因此，我将POM文件更新到具有相同版本，并且可以正常工作。

Answer 2

我认为您需要使用阴影插件并按照此步骤解决问题

https://ci.apache.org/projects/flink/flink/flink/flink-docs-release-1.4/monitoring/debugging_classloading.html#Resolvernydependency-dependency-conflicts-conflicts-with-flink-flink-flink-flink-flink-flink-shind-flink-shind-ring-sh--flink-shind-maven shade-maven shade-plugin shade-plugin shade-plugin shade-plugin