Thanks for reply.. @ Pradeep - I am using PigStorage load function. @ Darpan - I forgot to mention but I made sure that all values in columns are numeric and can be cast to double. @ Steven - Could you please explain more what resolved your error?
Thanks On Thu, Apr 24, 2014 at 2:59 PM, Steven E. Waldren <[email protected]>wrote: > Thanks I made a last ditch effort and bounced my cluster. The error went > away must be Cloudera gremlin. > > Thanks for the suggestions and help. > > Best, > Steven > > On Apr 24, 2014, at 12:25 PM, Darpan R <[email protected]> wrote: > > > Please do a sanity of the datacheck : colA2 might not be cast-able to > > numeric for one or more records. > > > > > > > > > > On 24 April 2014 22:24, Pradeep Gollakota <[email protected]> wrote: > > > >> Whats the LoadFunc you're using? > >> > >> > >> On Thu, Apr 24, 2014 at 9:28 AM, Swapnil Shinde < > [email protected] > >>> wrote: > >> > >>> I am facing very weird problem while multiplication. > >>> Pig simplified code snippet- > >>> A = LOAD 'file_A' AS (colA1 : double, colA2 : double); > >>> describe A; > >>> *A: {colA1: double,colA2: double}* > >>> B = LOAD 'file_B' AS (colB1 : double, colB2 : double); > >>> describe B; > >>> *B: {colB1: double,colB2: double}* > >>> > >>> joined = JOIN A BY (colA1) LEFT OUTER, B BY (colB1) USING 'replicated'; > >>> SPLIT joined INTO split1 IF A::colB1 IS NOT NULL, > >>> split2 IF (A::colB1 IS NULL AND A;:colA2 == > >> 2), > >>> split3 IF (A::colB1 IS NULL AND A;:colA2 != > >> 2); > >>> describe split1; > >>> * split1: {A::colA1: double,A::colA2: double,B::colB1: > >>> double,B::colB2: double}* > >>> > >>> > >>> D = FOREACH split1 GENERATE (A::colA1 * B::colB1) AS newCol; > >>> > >>> *Error-* > >>> 2014-04-24 10:02:30,458 [main] ERROR > >>> org.apache.pig.tools.pigstats.SimplePigStats - ERROR 0: Exception while > >>> executing [Multiply (Name: Multiply[double] - scope-6 Operator Key: > >>> scope-6) children: [[POProject (Name: Project[double][1] - scope-3 > >> Operator > >>> Key: scope-3) children: null at []], [POCast (Name: Cast[double] - > >> scope-5 > >>> Operator Key: scope-5) children: [[ConstantExpression (Name: > Constant(3) > >> - > >>> scope-4 Operator Key: scope-4) children: null at []]] at []]] at []]: > >>> java.lang.ClassCastException: org.apache.pig.data.DataByteArray cannot > be > >>> cast to java.lang.Number > >>> > >>> Stack tarce- > >>> org.apache.pig.backend.executionengine.ExecException: ERROR 0: > Exception > >>> while executing [Multiply (Name: Multiply[double] - scope-6 Operator > Key: > >>> scope-6) children: [[POProject (Name: Project[double][1] - scope-3 > >> Operator > >>> Key: scope-3) children: null at []], [POCast (Name: Cast[double] - > >> scope-5 > >>> Operator Key: scope-5) children: [[ConstantExpression (Name: > Constant(3) > >> - > >>> scope-4 Operator Key: scope-4) children: null at []]] at []]] at []]: > >>> java.lang.ClassCastException: org.apache.pig.data.DataByteArray cannot > be > >>> cast to java.lang.Number at > >>> > >>> > >> > org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:338) > >>> at > >>> > >>> > >> > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.processPlan(POForEach.java:378) > >>> at > >>> > >>> > >> > org.apache.pig.backend.hadoop.executionengine.physicalLayer.relationalOperators.POForEach.getNextTuple(POForEach.java:298) > >>> at > >>> > >>> > >> > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.runPipeline(PigGenericMapBase.java:282) > >>> at > >>> > >>> > >> > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:277) > >>> at > >>> > >>> > >> > org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.PigGenericMapBase.map(PigGenericMapBase.java:64) > >>> at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:144) at > >>> org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:681) at > >>> org.apache.hadoop.mapred.MapTask.run(MapTask.java:347) at > >>> org.apache.hadoop.mapred.Child$4.run(Child.java:270) at > >>> java.security.AccessController.doPrivileged(Native Method) at > >>> javax.security.auth.Subject.doAs(Subject.java:396) at > >>> > >>> > >> > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1127) > >>> at org.apache.hadoop.mapred.Child.main(Child.java:264) Caused by: > >>> java.lang.ClassCastException: org.apache.pig.data.DataByteArray cannot > be > >>> cast to java.lang.Number at > >>> > >>> > >> > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.Multiply.genericGetNext(Multiply.java:89) > >>> at > >>> > >>> > >> > org.apache.pig.backend.hadoop.executionengine.physicalLayer.expressionOperators.Multiply.getNextDouble(Multiply.java:104) > >>> at > >>> > >>> > >> > org.apache.pig.backend.hadoop.executionengine.physicalLayer.PhysicalOperator.getNext(PhysicalOperator.java:317) > >>> ... 13 more > >>> > >>> > >>> I tried below options but no luck- > >>> 1) Doing addition instead of multiplication and I get similar error. > >>> 2) I verified multiplication for double works with few sample files. > >>> 3) I tried casting it again to double before multiplication too. > >>> 4) I tried storing result before multiplication and loading it back. > >> still > >>> same error. > >>> > >>> I am not sure why it's throwing classCastException when schema has > double > >>> as data type. > >>> Please let me know if need any further information or missing something > >> in > >>> above simplified snippet. > >>> Any help is very much appreciated. > >>> > >>> Thanks > >>> > >> > >
