NPE in MERGE operator on MR mode

commit 3f7dde31aed44b5440563d3f9d8a8887beccf0be
Author: Daniel Dai <daijy@hortonworks.com>
Date:   Wed Mar 28 16:46:29 2018 -0700

    Preparing for 2.3.3 release

hive> set hive.execution.engine;
hive.execution.engine=mr

DROP TABLE IF EXISTS customer_target;
DROP TABLE IF EXISTS customer_source;

CREATE TABLE customer_target (id STRING, first_name STRING, last_name STRING, age INT) clustered by (id) into 2 buckets stored as ORC TBLPROPERTIES ('transactional'='true');

insert into customer_target values ('001', 'John', 'Smith', 45), ('002', 'Michael', 'Watson', 27), ('003', 'Den', 'Brown', 33);
SELECT id, first_name, last_name, age  FROM customer_target;

+------+-------------+------------+------+
|  id  | first_name  | last_name  | age  |
+------+-------------+------------+------+
| 002  | Michael     | Watson     | 27   |
| 001  | John        | Smith      | 45   |
| 003  | Den         | Brown      | 33   |
+------+-------------+------------+------+

CREATE TABLE customer_source (id STRING, first_name STRING, last_name STRING, age INT);

insert into customer_source values ('001', 'Dorothi', 'Hogward', 77), ('007', 'Alex', 'Bowee', 1), ('088', 'Robert', 'Dowson', 25);
SELECT id, first_name, last_name, age  FROM customer_source;

+------+-------------+------------+------+
|  id  | first_name  | last_name  | age  |
+------+-------------+------------+------+
| 088  | Robert      | Dowson     | 25   |
| 001  | Dorothi     | Hogward    | 77   |
| 007  | Alex        | Bowee      | 1    |
+------+-------------+------------+------+

merge into customer_target trg using customer_source src on src.id = trg.id when matched then update set first_name = src.first_name, last_name = src.last_name when not matched then insert values (src.id, src.first_name, src.last_name, src.age);

2018-04-24T07:11:44,448 DEBUG [main] log.PerfLogger: <PERFLOG method=deserializePlan from=org.apache.hadoop.hive.ql.exec.SerializationUtilities>
2018-04-24T07:11:44,448  INFO [main] exec.SerializationUtilities: Deserializing MapredLocalWork using kryo
2018-04-24T07:11:44,463 DEBUG [main] exec.Utilities: Hive Conf not found or Session not initiated, use thread based class loader instead
2018-04-24T07:11:44,538 DEBUG [main] log.PerfLogger: </PERFLOG method=deserializePlan start=1524568304448 end=1524568304538 duration=90 from=org.apache.hadoop.hive.ql.exec.SerializationUtilities>
2018-04-24T07:11:44,545  INFO [main] mr.MapredLocalTask: 2018-04-24 07:11:44    Starting to launch local task to process map join;      maximum memory = 477626368
2018-04-24T07:11:44,545 DEBUG [main] mr.MapredLocalTask: initializeOperators: trg, children = [HASHTABLESINK[37]]
2018-04-24T07:11:44,656 DEBUG [main] exec.Utilities: Hive Conf not found or Session not initiated, use thread based class loader instead
2018-04-24T07:11:44,676  INFO [main] mr.MapredLocalTask: fetchoperator for trg created
2018-04-24T07:11:44,676  INFO [main] exec.TableScanOperator: Initializing operator TS[0]
2018-04-24T07:11:44,676 DEBUG [main] exec.TableScanOperator: Initialization Done 0 TS
2018-04-24T07:11:44,676 DEBUG [main] exec.TableScanOperator: Operator 0 TS initialized
2018-04-24T07:11:44,676 DEBUG [main] exec.TableScanOperator: Initializing children of 0 TS
2018-04-24T07:11:44,676 DEBUG [main] exec.HashTableSinkOperator: Initializing child 37 HASHTABLESINK
2018-04-24T07:11:44,676  INFO [main] exec.HashTableSinkOperator: Initializing operator HASHTABLESINK[37]
2018-04-24T07:11:44,677  INFO [main] mapjoin.MapJoinMemoryExhaustionHandler: JVM Max Heap Size: 477626368
2018-04-24T07:11:44,680 ERROR [main] mr.MapredLocalTask: Hive Runtime Error: Map local work failed
java.lang.NullPointerException
        at org.apache.hadoop.hive.ql.exec.ExprNodeColumnEvaluator.initialize(ExprNodeColumnEvaluator.java:57) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.JoinUtil.getObjectInspectorsFromEvaluators(JoinUtil.java:91) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.HashTableSinkOperator.initializeOp(HashTableSinkOperator.java:153) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:366) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:556) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.Operator.initializeChildren(Operator.java:508) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.Operator.initialize(Operator.java:376) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.mr.MapredLocalTask.initializeOperators(MapredLocalTask.java:508) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.mr.MapredLocalTask.startForward(MapredLocalTask.java:411) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.mr.MapredLocalTask.executeInProcess(MapredLocalTask.java:391) ~[hive-exec-2.3.3.jar:2.3.3]
        at org.apache.hadoop.hive.ql.exec.mr.ExecDriver.main(ExecDriver.java:764) ~[hive-exec-2.3.3.jar:2.3.3]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_161]
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_161]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_161]
        at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_161]
        at org.apache.hadoop.util.RunJar.run(RunJar.java:221) ~[hadoop-common-2.7.2.jar:?]
        at org.apache.hadoop.util.RunJar.main(RunJar.java:136) ~[hadoop-common-2.7.2.jar:?]