【Flink异常】Caused by: org.apache.flink.table.api.ValidationException: Could not find any factories

文章目录

1. 异常详情

Exception in thread "main" org.apache.flink.table.api.ValidationException: Could not find any factories that implement 'org.apache.flink.table.factories.FileSystemFormatFactory' in the classpath.
	at org.apache.flink.table.factories.FactoryUtil.discoverFactory(FactoryUtil.java:229)
	at org.apache.flink.table.filesystem.FileSystemTableFactory.createFormatFactory(FileSystemTableFactory.java:112)
	at org.apache.flink.table.filesystem.FileSystemTableSource.getInputFormat(FileSystemTableSource.java:143)
	at org.apache.flink.table.filesystem.FileSystemTableSource.getDataStream(FileSystemTableSource.java:127)
	at org.apache.flink.table.planner.plan.nodes.physical.PhysicalLegacyTableSourceScan.getSourceTransformation(PhysicalLegacyTableSourceScan.scala:82)
	at org.apache.flink.table.planner.plan.nodes.physical.batch.BatchExecLegacyTableSourceScan.translateToPlanInternal(BatchExecLegacyTableSourceScan.scala:95)
	at org.apache.flink.table.planner.plan.nodes.physical.batch.BatchExecLegacyTableSourceScan.translateToPlanInternal(BatchExecLegacyTableSourceScan.scala:57)
	at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:58)

2. 原因

原因：使用flink sql中的format参数解析文本时，没有引入相关format依赖（笔者使用的是flink 1.11版本）。

报错代码：

 String sourceSql = "CREATE TABLE url_parse_100 ("
            + " logtime STRING,"
            + " sign STRING,"
            + " version STRING"
            + " ) WITH ( "
            + " 'connector' = 'filesystem',"
            + " 'path' = 'E:/url_parse_100.txt',"
            + " 'format' = 'json'"
            + ")";

        System.out.println("执行SQL: " + sourceSql);

        tableEnv.executeSql(sourceSql);

上例中format参数值为“json”，因此需要引入flink json模块依赖。

3. 解决办法

根据数据格式引入相应flink format相关依赖。

上例中需要引入的pom依赖为：

<dependency>
    <groupId>org.apache.flink</groupId>
    <artifactId>flink-json</artifactId>
    <version>1.11.0</version>
</dependency>