MapReduce输出avro文件，报错GenericData.createDatumWriter...NoSuchMethodError

Hadoop 2.7.2 <dependency>     <groupId>org.apache.avro</groupId>     <artifactId>avro</artifactId>     <version>1.7.7</version> </dependency> <dependency>     <groupId>org.apache.avro</groupId>     <a

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