Hi, according to the description of the reflect UDF, you are trying to call java.util.UUID.hashcode(uidString), which doesnt seem to be an existing method on either java 6/7.
http://docs.oracle.com/javase/7/docs/api/java/util/UUID.html#hashCode() Thanks Szehon On Wed, Apr 2, 2014 at 2:13 PM, Andy Srine <andy.sr...@gmail.com> wrote: > Hi guys, > > > I am trying to use the reflect UDF for an UUID method and am getting an > exception. I believe this function should be available in java 1.6.0_31 the > system is running. > > > select reflect("java.util.UUID", "hashCode", uid_str) my_uid, > > ... > > > My suspicion is, this is because the hive column I am calling this on is a > string and not an UUID. So I nested the reflects as shown below to go from > a string to an UUID first and then to "hashCode" it. > > > reflect("java.util.UUID", "hashCode", reflect("java.util.UUID", > "fromString", uid_str)) my_uid, > > > In either case, I always get the exception below though the row of data it > prints has no null for the uid_str column. Any ideas? > > > at > org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:565) > > at org.apache.hadoop.hive.ql.exec.ExecMapper.map(ExecMapper.java:143) > > ... 8 more > > Caused by: org.apache.hadoop.hive.ql.metadata.HiveException: UDFReflect > getMethod > > at > org.apache.hadoop.hive.ql.udf.generic.GenericUDFReflect.evaluate(GenericUDFReflect.java:164) > > at > org.apache.hadoop.hive.ql.exec.ExprNodeGenericFuncEvaluator.evaluate(ExprNodeGenericFuncEvaluator.java:163) > > at > org.apache.hadoop.hive.ql.exec.KeyWrapperFactory$ListKeyWrapper.getNewKey(KeyWrapperFactory.java:113) > > at > org.apache.hadoop.hive.ql.exec.GroupByOperator.processOp(GroupByOperator.java:794) > > at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:474) > > at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:800) > > at > org.apache.hadoop.hive.ql.exec.SelectOperator.processOp(SelectOperator.java:84) > > at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:474) > > at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:800) > > at > org.apache.hadoop.hive.ql.exec.TableScanOperator.processOp(TableScanOperator.java:83) > > at org.apache.hadoop.hive.ql.exec.Operator.process(Operator.java:474) > > at org.apache.hadoop.hive.ql.exec.Operator.forward(Operator.java:800) > > at org.apache.hadoop.hive.ql.exec.MapOperator.process(MapOperator.java:548) > > ... 9 more > > Caused by: java.lang.NoSuchMethodException: java.util.UUID.hashCode(null) > > at java.lang.Class.getMethod(Class.java:1605) > > at > org.apache.hadoop.hive.ql.udf.generic.GenericUDFReflect.evaluate(GenericUDFReflect.java:160) > > > Thanks, > > Andy > > >
