Prasad Nagaraj Subramanya created DRILL-5869:
------------------------------------------------
Summary: Empty maps not handled
Key: DRILL-5869
URL: https://issues.apache.org/jira/browse/DRILL-5869
Project: Apache Drill
Issue Type: Bug
Components: Storage - JSON
Affects Versions: 1.11.0
Reporter: Prasad Nagaraj Subramanya
Consider the below json -
{code}
{a:{}}
{code}
A query on the column 'a' throws NPE -
{code}
select a from temp.json;
{code}
Stack trace -
{code}
org.apache.drill.common.exceptions.UserException: SYSTEM ERROR:
NullPointerException
Fragment 0:0
[Error Id: 7f81fa02-4b20-4401-9d18-bd901653d11d on pns182.qa.lab:31010]
at
org.apache.drill.common.exceptions.UserException$Builder.build(UserException.java:586)
~[drill-common-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.work.fragment.FragmentExecutor.sendFinalState(FragmentExecutor.java:298)
[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.work.fragment.FragmentExecutor.cleanup(FragmentExecutor.java:160)
[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:267)
[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.common.SelfCleaningRunnable.run(SelfCleaningRunnable.java:38)
[drill-common-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[na:1.8.0_144]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[na:1.8.0_144]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_144]
Caused by: java.lang.NullPointerException: null
at
org.apache.drill.exec.test.generated.ProjectorGen0.setup(ProjectorTemplate.java:91)
~[na:na]
at
org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.setupNewSchemaFromInput(ProjectRecordBatch.java:497)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.setupNewSchema(ProjectRecordBatch.java:505)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:82)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:141)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:164)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:105)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:81)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:95)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:234)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at
org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:227)
~[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
at java.security.AccessController.doPrivileged(Native Method)
~[na:1.8.0_144]
at javax.security.auth.Subject.doAs(Subject.java:422) ~[na:1.8.0_144]
at
org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1595)
~[hadoop-common-2.7.0-mapr-1607.jar:na]
at
org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:227)
[drill-java-exec-1.12.0-SNAPSHOT.jar:1.12.0-SNAPSHOT]
... 4 common frames omitted
{code}
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