报错信息：
2017-06-15 15:02:15,374 INFO [main] org.apache.hadoop.mapred.MapTask: Ignoring exception during close for org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader@7555b920 java.io.IOException: java.sql.SQLException: Protocol violation at org.apache.sqoop.mapreduce.db.DBRecordReader.close(DBRecordReader.java:173) at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.close(MapTask.java:523) at org.apache.hadoop.mapred.MapTask.closeQuietly(MapTask.java:2004) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:796) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158) Caused by: java.sql.SQLException: Protocol violation at oracle.jdbc.driver.T4CTTIfun.readRXH(T4CTTIfun.java:631) at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:391) at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:227) at oracle.jdbc.driver.T4C7Ocommoncall.doOCOMMIT(T4C7Ocommoncall.java:75) at oracle.jdbc.driver.T4CConnection.doCommit(T4CConnection.java:641) at oracle.jdbc.driver.PhysicalConnection.commit(PhysicalConnection.java:3928) at oracle.jdbc.driver.PhysicalConnection.commit(PhysicalConnection.java:3934) at org.apache.sqoop.mapreduce.db.DBRecordReader.close(DBRecordReader.java:169) ... 9 more 2017-06-15 15:02:15,384 FATAL [main] org.apache.hadoop.mapred.YarnChild: Error running child : java.lang.OutOfMemoryError: Java heap space at java.lang.reflect.Array.newArray(Native Method) at java.lang.reflect.Array.newInstance(Array.java:75) at oracle.jdbc.driver.BufferCache.get(BufferCache.java:226) at oracle.jdbc.driver.PhysicalConnection.getCharBuffer(PhysicalConnection.java:7698) at oracle.jdbc.driver.OracleStatement.prepareAccessors(OracleStatement.java:1013) at oracle.jdbc.driver.T4CTTIdcb.receiveCommon(T4CTTIdcb.java:277) at oracle.jdbc.driver.T4CTTIdcb.receive(T4CTTIdcb.java:146) at oracle.jdbc.driver.T4C8Oall.readDCB(T4C8Oall.java:916) at oracle.jdbc.driver.T4CTTIfun.receive(T4CTTIfun.java:421) at oracle.jdbc.driver.T4CTTIfun.doRPC(T4CTTIfun.java:227) at oracle.jdbc.driver.T4C8Oall.doOALL(T4C8Oall.java:531) at oracle.jdbc.driver.T4CPreparedStatement.doOall8(T4CPreparedStatement.java:208) at oracle.jdbc.driver.T4CPreparedStatement.executeForDescribe(T4CPreparedStatement.java:886) at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1175) at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1296) at oracle.jdbc.driver.OraclePreparedStatement.executeInternal(OraclePreparedStatement.java:3613) at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:3657) at oracle.jdbc.driver.OraclePreparedStatementWrapper.executeQuery(OraclePreparedStatementWrapper.java:1495) at org.apache.sqoop.mapreduce.db.DBRecordReader.executeQuery(DBRecordReader.java:111) at org.apache.sqoop.mapreduce.db.DBRecordReader.nextKeyValue(DBRecordReader.java:235) at org.apache.hadoop.mapred.MapTask$NewTrackingRecordReader.nextKeyValue(MapTask.java:556) at org.apache.hadoop.mapreduce.task.MapContextImpl.nextKeyValue(MapContextImpl.java:80) at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.nextKeyValue(WrappedMapper.java:91) at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145) at org.apache.sqoop.mapreduce.AutoProgressMapper.run(AutoProgressMapper.java:64) at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787) at org.apache.hadoop.mapred.MapTask.run(MapTask.java:341) at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:164) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:422) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657) at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:158)can
