我正在使用 Flink 1.12，我有以下简单代码，我想从文件系统注册一个表，然后将其转换为数据集，然后将其打印到控制台。但是我运行该应用程序时，抛出异常如下：
Exception in thread "main" org.apache.flink.table.api.TableException: findAndCreateTableSource failed.
at org.apache.flink.table.factories.TableFactoryUtil.findAndCreateTableSource(TableFactoryUtil.java:49)
at org.apache.flink.table.catalog.DatabaseCalciteSchema.convertCatalogTable(DatabaseCalciteSchema.java:164)
at org.apache.flink.table.catalog.DatabaseCalciteSchema.convertTable(DatabaseCalciteSchema.java:107)
at org.apache.flink.table.catalog.DatabaseCalciteSchema.lambda$getTable$0(DatabaseCalciteSchema.java:91)
at java.util.Optional.map(Optional.java:215)
at org.apache.flink.table.catalog.DatabaseCalciteSchema.getTable(DatabaseCalciteSchema.java:82)
at org.apache.calcite.jdbc.SimpleCalciteSchema.getImplicitTable(SimpleCalciteSchema.java:83)
at org.apache.calcite.jdbc.CalciteSchema.getTable(CalciteSchema.java:289)
at org.apache.calcite.sql.validate.SqlValidatorUtil.getTableEntryFrom(SqlValidatorUtil.java:1059)
at org.apache.calcite.sql.validate.SqlValidatorUtil.getTableEntry(SqlValidatorUtil.java:1016)
at org.apache.calcite.prepare.CalciteCatalogReader.getTable(CalciteCatalogReader.java:119)
at org.apache.calcite.prepare.CalciteCatalogReader.getTableForMember(CalciteCatalogReader.java:229)
at org.apache.calcite.prepare.CalciteCatalogReader.getTableForMember(CalciteCatalogReader.java:83)
at org.apache.calcite.tools.RelBuilder.scan(RelBuilder.java:1094)
at org.apache.calcite.tools.RelBuilder.scan(RelBuilder.java:1123)
at org.apache.flink.table.plan.QueryOperationConverter$SingleRelVisitor.visit(QueryOperationConverter.java:282)
at org.apache.flink.table.plan.QueryOperationConverter$SingleRelVisitor.visit(QueryOperationConverter.java:140)
at org.apache.flink.table.operations.CatalogQueryOperation.accept(CatalogQueryOperation.java:69)
at org.apache.flink.table.plan.QueryOperationConverter.defaultMethod(QueryOperationConverter.java:137)
at org.apache.flink.table.plan.QueryOperationConverter.defaultMethod(QueryOperationConverter.java:117)
at org.apache.flink.table.operations.utils.QueryOperationDefaultVisitor.visit(QueryOperationDefaultVisitor.java:92)
at org.apache.flink.table.operations.CatalogQueryOperation.accept(CatalogQueryOperation.java:69)
at org.apache.flink.table.calcite.FlinkRelBuilder.tableOperation(FlinkRelBuilder.scala:121)
at org.apache.flink.table.api.internal.BatchTableEnvImpl.translate(BatchTableEnvImpl.scala:553)
at org.apache.flink.table.api.internal.BatchTableEnvImpl.translate(BatchTableEnvImpl.scala:537)
at org.apache.flink.table.api.bridge.scala.internal.BatchTableEnvironmentImpl.toDataSet(BatchTableEnvironmentImpl.scala:70)
at org.apache.flink.table.api.bridge.scala.TableConversions.toDataSet(TableConversions.scala:53)
at org.example.dataset.DatasetTest$.main(DatasetTest.scala:31)
at org.example.dataset.DatasetTest.main(DatasetTest.scala)
Caused by: org.apache.flink.table.api.NoMatchingTableFactoryException: Could not find a suitable table factory for 'org.apache.flink.table.factories.TableSourceFactory' in
the classpath.
Reason: Required context properties mismatch.
The following properties are requested:
connector=filesystem
format=csv
path=D:/projects/openprojects3/learn.flink.ioc/data/stock.csv.copy
schema.0.data-type=VARCHAR(2147483647)
schema.0.name=x
schema.1.data-type=VARCHAR(2147483647)
schema.1.name=y
The following factories have been considered:
org.apache.flink.table.sources.CsvBatchTableSourceFactory
org.apache.flink.table.sources.CsvAppendTableSourceFactory
org.apache.flink.streaming.connectors.kafka.KafkaTableSourceSinkFactory
org.apache.flink.connector.jdbc.table.JdbcTableSourceSinkFactory
at org.apache.flink.table.factories.TableFactoryService.filterByContext(TableFactoryService.java:322)
at org.apache.flink.table.factories.TableFactoryService.filter(TableFactoryService.java:190)
at org.apache.flink.table.factories.TableFactoryService.findSingleInternal(TableFactoryService.java:143)
at org.apache.flink.table.factories.TableFactoryService.find(TableFactoryService.java:96)
at org.apache.flink.table.factories.TableFactoryUtil.findAndCreateTableSource(TableFactoryUtil.java:46)
... 28 more
应用代码为：
import org.apache.flink.api.scala._
import org.apache.flink.table.api.FieldExpression
import org.apache.flink.table.api.bridge.scala._
object DatasetTest {
def main(args: Array[String]): Unit = {
val env = ExecutionEnvironment.getExecutionEnvironment
env.setParallelism(1)
val tenv = BatchTableEnvironment.create(env)
val ddl2 =
"""
create table sourceTable(
x STRING,
y STRING
) with (
'connector' = 'filesystem',
'path' = 'D:/stock.csv',
'format' = 'csv'
)
""".stripMargin(' ')
tenv.executeSql(ddl2)
tenv.from("sourceTable").toDataSet[(String, String)].print()
env.execute()
}
}