错误信息：
java.io.IOException: java.sql.BatchUpdateException: Incorrect string value: '\xD6\xD0\xB9\xFA\xB9\xA4...' for column 'content' at row 1
at org.apache.gora.sql.store.SqlStore.flush(SqlStore.java:340)
at org.apache.gora.sql.store.SqlStore.close(SqlStore.java:185)
at org.apache.gora.mapreduce.GoraRecordWriter.close(GoraRecordWriter.java:55)
at org.apache.hadoop.mapred.ReduceTask$NewTrackingRecordWriter.close(ReduceTask.java:579)
at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:650)
at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:417)
at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:260)
Caused by: java.sql.BatchUpdateException: Incorrect string value: '\xD6\xD0\xB9\xFA\xB9\xA4...' for column 'content' at row 1
at com.mysql.jdbc.PreparedStatement.executeBatchSerially(PreparedStatement.java:1666)
at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:1082)
at org.apache.gora.sql.store.SqlStore.flush(SqlStore.java:328)

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