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From "Niklaus Xiao (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HIVE-14694) UDF rand throws NPE when input data is NULL
Date Fri, 02 Sep 2016 08:35:20 GMT
Niklaus Xiao created HIVE-14694:
-----------------------------------

             Summary: UDF rand throws NPE when input data is NULL
                 Key: HIVE-14694
                 URL: https://issues.apache.org/jira/browse/HIVE-14694
             Project: Hive
          Issue Type: Bug
          Components: UDF
    Affects Versions: 2.2.0
            Reporter: Niklaus Xiao
            Assignee: Niklaus Xiao
            Priority: Minor


When use {{rand}} function with null, HiveServer throws NPE:
{code}
0: jdbc:hive2://10.64.35.144:21066/> desc foo1;
+-----------+------------+----------+--+
| col_name  | data_type  | comment  |
+-----------+------------+----------+--+
| c1        | bigint     |          |
+-----------+------------+----------+--+
1 row selected (0.075 seconds)
0: jdbc:hive2://10.64.35.144:21066/> select * from foo1;
+----------+--+
| foo1.c1  |
+----------+--+
| NULL     |
| 1        |
| 2        |
+----------+--+
3 rows selected (0.124 seconds)
0: jdbc:hive2://10.64.35.144:21066/> select rand(c1) from foo1;
Error: java.io.IOException: org.apache.hadoop.hive.ql.metadata.HiveException: Unable to execute
method public org.apache.hadoop.hive.serde2.io.DoubleWritable org.apache.hadoop.hive.ql.udf.UDFRand.evaluate(org.apache.hadoop.io.LongWritable)
 on object org.apache.hadoop.hive.ql.udf.UDFRand@37a2b47b of class org.apache.hadoop.hive.ql.udf.UDFRand
with arguments {null} of size 1 (state=,code=0)
{code}

Stack trace:
{code}
Caused by: java.lang.reflect.InvocationTargetException
        at sun.reflect.GeneratedMethodAccessor79.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.hadoop.hive.ql.exec.FunctionRegistry.invoke(FunctionRegistry.java:1010)
        ... 36 more
Caused by: java.lang.NullPointerException
        at org.apache.hadoop.hive.ql.udf.UDFRand.evaluate(UDFRand.java:57)
        ... 40 more
{code}



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