为什么会有这种情况出现呢?

这里是我对一张表拿它的主键时抛出来的异常.不知怎么解决?之前还是运进的好好地.java.sql.SQLException: Not in a transaction
 at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:168)
 at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:210)
 at oracle.jdbc.dbaccess.DBError.throwSqlException(DBError.java:273)
 at oracle.jdbc.driver.OracleConnection.needLine(OracleConnection.java:1621)
 at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:412)
 at oracle.jdbc.driver.OracleStatement.<init>(OracleStatement.java:432)
 at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedStatement.java:182)
 at oracle.jdbc.driver.OraclePreparedStatement.<init>(OraclePreparedStatement.java:165)
 at oracle.jdbc.driver.OracleConnection.privatePrepareStatement(OracleConnection.java:608)
 at oracle.jdbc.driver.OracleConnection.prepareStatement(OracleConnection.java:489)
 at oracle.jdbc.OracleDatabaseMetaData.getPrimaryKeys(OracleDatabaseMetaData.java:2908)
 at com.whbhk.apps.dim.db.DB.primaryKeyColumnName(DB.java:567)
 at com.whbhk.apps.dim.db.DB.dbSelectTable(DB.java:491)
 at com.whbhk.apps.dim.db.DB.dbSelectRecord(DB.java:89)
 at com.whbhk.apps.dim.db.DTY.getDtyRecord(DTY.java:1329)
 at com.whbhk.apps.dim.bus.EditDocType.queryOneDocInfos(EditDocType.java:192)
 at com.whbhk.apps.dim.req.BRTI_EDIT.processONE_DOC_TYPE_INFOS(BRTI_EDIT.java:108)