External table not loading data after Alter

Hi,

I created a external table with 'A' as string but stores a decimal value. Loaded data into the table then during report creation I realized my mistake and altered the column 'A' to double. Now I want to access that data but get the below error. I tried 

set hive.msck.path.validation=ignore;
msck repair table tablename; 

 But still get the below error. 

Bad status for request TFetchResultsReq(fetchType=0, operationHandle=TOperationHandle(hasResultSet=True, modifiedRowCount=None, operationType=0, operationId=THandleIdentifier(secret='\nv\xe01\x14\x7fD\xd2\xb0\xadk\xd1\xbe\x9a\xd2\xd6', guid='\x19\xc2\x13b\x82\x96O\xd1\x93\x04\xf7\xdd\xc5\xcfz\xeb')), orientation=4, maxRows=100): TFetchResultsResp(status=TStatus(errorCode=0, errorMessage='java.io.IOException: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ClassCastException: org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.io.DoubleWritable', sqlState=None, infoMessages=['*org.apache.hive.service.cli.HiveSQLException:java.io.IOException: org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ClassCastException: org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.io.DoubleWritable:14:13', 'org.apache.hive.service.cli.operation.SQLOperation:getNextRowSet:SQLOperation.java:496', 'org.apache.hive.service.cli.operation.OperationManager:getOperationNextRowSet:OperationManager.java:297', 'org.apache.hive.service.cli.session.HiveSessionImpl:fetchResults:HiveSessionImpl.java:868', 'org.apache.hive.service.cli.CLIService:fetchResults:CLIService.java:507', 'org.apache.hive.service.cli.thrift.ThriftCLIService:FetchResults:ThriftCLIService.java:708', 'org.apache.hive.service.rpc.thrift.TCLIService$Processor$FetchResults:getResult:TCLIService.java:1717', 'org.apache.hive.service.rpc.thrift.TCLIService$Processor$FetchResults:getResult:TCLIService.java:1702', 'org.apache.thrift.ProcessFunction:process:ProcessFunction.java:39', 'org.apache.thrift.TBaseProcessor:process:TBaseProcessor.java:39', 'org.apache.hadoop.hive.thrift.HadoopThriftAuthBridge$Server$TUGIAssumingProcessor:process:HadoopThriftAuthBridge.java:605', 'org.apache.thrift.server.TThreadPoolServer$WorkerProcess:run:TThreadPoolServer.java:286', 'java.util.concurrent.ThreadPoolExecutor:runWorker:ThreadPoolExecutor.java:1149', 'java.util.concurrent.ThreadPoolExecutor$Worker:run:ThreadPoolExecutor.java:624', 'java.lang.Thread:run:Thread.java:748', '*java.io.IOException:org.apache.hadoop.hive.ql.metadata.HiveException: java.lang.ClassCastException: org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.io.DoubleWritable:16:2', 'org.apache.hadoop.hive.ql.exec.FetchTask:fetch:FetchTask.java:164', 'org.apache.hadoop.hive.ql.Driver:getResults:Driver.java:2227', 'org.apache.hive.service.cli.operation.SQLOperation:getNextRowSet:SQLOperation.java:491', '*org.apache.hadoop.hive.ql.metadata.HiveException:java.lang.ClassCastException: org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.io.DoubleWritable:25:9', 'org.apache.hadoop.hive.ql.exec.ListSinkOperator:process:ListSinkOperator.java:97', 'org.apache.hadoop.hive.ql.exec.Operator:forward:Operator.java:882', 'org.apache.hadoop.hive.ql.exec.LimitOperator:process:LimitOperator.java:63', 'org.apache.hadoop.hive.ql.exec.Operator:forward:Operator.java:882', 'org.apache.hadoop.hive.ql.exec.SelectOperator:process:SelectOperator.java:95', 'org.apache.hadoop.hive.ql.exec.Operator:forward:Operator.java:882', 'org.apache.hadoop.hive.ql.exec.TableScanOperator:process:TableScanOperator.java:130', 'org.apache.hadoop.hive.ql.exec.FetchOperator:pushRow:FetchOperator.java:438', 'org.apache.hadoop.hive.ql.exec.FetchOperator:pushRow:FetchOperator.java:430', 'org.apache.hadoop.hive.ql.exec.FetchTask:fetch:FetchTask.java:146', '*java.lang.ClassCastException:org.apache.hadoop.io.Text cannot be cast to org.apache.hadoop.io.DoubleWritable:30:5', 'org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableDoubleObjectInspector:get:WritableDoubleObjectInspector.java:36', 'org.apache.hadoop.hive.serde2.objectinspector.primitive.WritableDoubleObjectInspector:getPrimitiveJavaObject:WritableDoubleObjectInspector.java:46', 'org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils:copyToStandardObject:ObjectInspectorUtils.java:412', 'org.apache.hadoop.hive.serde2.SerDeUtils:toThriftPayload:SerDeUtils.java:170', 'org.apache.hadoop.hive.serde2.thrift.ThriftFormatter:convert:ThriftFormatter.java:49', 'org.apache.hadoop.hive.ql.exec.ListSinkOperator:process:ListSinkOperator.java:94'], statusCode=3), results=None, hasMoreRows=None)

How can I fix my problem? 

Thanks