Jihoon Son created TAJO-1368:
--------------------------------
Summary: NPE during processing nested union queries
Key: TAJO-1368
URL: https://issues.apache.org/jira/browse/TAJO-1368
Project: Tajo
Issue Type: Bug
Components: distributed query plan, worker
Reporter: Jihoon Son
This error is reported from the Apache Tajo Korea user group
(https://groups.google.com/forum/#!topic/tajo-user-kr/tipQj6cv-k0).
You can reproduce the reported errors as follows:
{noformat}
default> create table test_union_all (cd int, nm text);
default> insert into test_union_all select 1,'aaa';
default> insert into test_union_all select 1,'bbb';
{noformat}
*Case 1*
Distributed query planner emits NPE as follows:
{noformat}
default> select * from
(
select * from test_union_all
union all
select * from test_union_all
)a
union all
select * from
(
select * from test_union_all
union all
select * from test_union_all
)a;
2015-03-03 13:59:12,738 ERROR org.apache.tajo.querymaster.QueryMasterTask:
java.lang.NullPointerException
at
org.apache.tajo.engine.planner.global.DataChannel.<init>(DataChannel.java:57)
at
org.apache.tajo.engine.planner.global.GlobalPlanner$DistributedPlannerVisitor.visitUnion(GlobalPlanner.java:1405)
at
org.apache.tajo.engine.planner.global.GlobalPlanner$DistributedPlannerVisitor.visitUnion(GlobalPlanner.java:1140)
at
org.apache.tajo.plan.visitor.BasicLogicalPlanVisitor.visit(BasicLogicalPlanVisitor.java:96)
at
org.apache.tajo.plan.visitor.BasicLogicalPlanVisitor.visitRoot(BasicLogicalPlanVisitor.java:151)
at
org.apache.tajo.engine.planner.global.GlobalPlanner$DistributedPlannerVisitor.visitRoot(GlobalPlanner.java:1145)
at
org.apache.tajo.engine.planner.global.GlobalPlanner$DistributedPlannerVisitor.visitRoot(GlobalPlanner.java:1140)
at
org.apache.tajo.plan.visitor.BasicLogicalPlanVisitor.visit(BasicLogicalPlanVisitor.java:60)
at
org.apache.tajo.engine.planner.global.GlobalPlanner.build(GlobalPlanner.java:146)
at
org.apache.tajo.querymaster.QueryMasterTask.startQuery(QueryMasterTask.java:357)
at
org.apache.tajo.querymaster.QueryMasterTask.start(QueryMasterTask.java:172)
at
org.apache.tajo.querymaster.QueryMaster$QueryStartEventHandler.handle(QueryMaster.java:410)
at
org.apache.tajo.querymaster.QueryMaster$QueryStartEventHandler.handle(QueryMaster.java:397)
at
org.apache.hadoop.yarn.event.AsyncDispatcher.dispatch(AsyncDispatcher.java:173)
at
org.apache.hadoop.yarn.event.AsyncDispatcher$1.run(AsyncDispatcher.java:106)
at java.lang.Thread.run(Thread.java:745)
{noformat}
*Case 2*
TaskRunner emits NPE as follows:
{noformat}
default> select * from (
select cd, nm
from
(
select cd, nm
from
(
select cd, nm
from test_union_all
)a
union all
select cd, nm
from
(
select cd, nm
from test_union_all
)a
) a
)a;
2015-03-03 14:05:02,960 ERROR org.apache.tajo.worker.Task:
java.lang.IllegalArgumentException: URI scheme is not "file"
java.io.IOException: java.lang.IllegalArgumentException: URI scheme is not
"file"
at
org.apache.tajo.storage.RawFile$RawFileAppender.init(RawFile.java:485)
at
org.apache.tajo.engine.planner.physical.StoreTableExec.openNewFile(StoreTableExec.java:110)
at
org.apache.tajo.engine.planner.physical.StoreTableExec.init(StoreTableExec.java:79)
at org.apache.tajo.worker.Task.run(Task.java:405)
at org.apache.tajo.worker.TaskRunner$1.run(TaskRunner.java:276)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.IllegalArgumentException: URI scheme is not "file"
at java.io.File.<init>(File.java:421)
at
org.apache.tajo.storage.RawFile$RawFileAppender.init(RawFile.java:480)
... 5 more
2015-03-03 14:05:02,963 ERROR org.apache.tajo.worker.TaskRunner:
java.lang.NullPointerException
at
org.apache.tajo.storage.RawFile$RawFileAppender.close(RawFile.java:756)
at
org.apache.tajo.engine.planner.physical.StoreTableExec.close(StoreTableExec.java:143)
at org.apache.tajo.worker.Task.run(Task.java:417)
at org.apache.tajo.worker.TaskRunner$1.run(TaskRunner.java:276)
at java.lang.Thread.run(Thread.java:745)
{noformat}
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
