[TAJO-1190] INSERT INTO to partition tables may cause NPE.

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.9.0
• Fix Version/s: 0.10.0
• Assignee: Hyunsik Choi
• Reporter: Hyunsik Choi
• Created: 18/Nov/14 04:41
• Updated: 02/Dec/14 17:44
• Resolved: 02/Dec/14 17:28

Description

Reproduction

tajo> CREATE EXTERNAL TABLE distinct_tb (distinct_id text) USING CSV PARTITION BY COLUMN (CNT TEXT) LOCATION '/user/hyunsik/test';
OK

> insert overwrite into distinct_tb (distinct_id) select l_returnflag from lineitem where l_orderkey = 1000 limit 1;
default> insert overwrite into distinct_tb (distinct_id) select l_returnflag from lineitem where l_orderkey = 1000 limit 1;
Progress: 0%, response time: 0.202 sec
Progress: 0%, response time: 0.203 sec
Progress: 0%, response time: 0.607 sec
Progress: 11%, response time: 1.409 sec
Progress: 28%, response time: 2.414 sec
ERROR: java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
	at org.apache.tajo.engine.planner.physical.HashShuffleFileWriteExec.next(HashShuffleFileWriteExec.java:152)
	at org.apache.tajo.worker.Task.run(Task.java:448)
	at org.apache.tajo.worker.TaskRunner$1.run(TaskRunner.java:276)
	at java.lang.Thread.run(Thread.java:744)
Caused by: java.lang.NullPointerException
	at org.apache.tajo.engine.planner.physical.HashShuffleFileWriteExec.next(HashShuffleFileWriteExec.java:142)
	... 3 more

Description
This problem actually includes three bugs: 1) NULL of InputStats of SeqScan, 2) NULL of getCause().getMessage in RemoteCallException, and 3) some null check bug in TajoWorkerClientService.

This patch fixes the all bugs that I found.