[ZEPPELIN-5290] NPE on empty dynamic form input

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.9.1, 0.10.0
• Assignee: Jeff Zhang
• Reporter: Vladimir Prus
• Created: 16/Mar/21 09:39
• Updated: 18/Jun/21 21:28
• Resolved: 18/Jun/21 03:07

Description

Try to run the following paragraphs:

 

%spark.sql
select * from (
 select "foo" as a
) 
where (a = '${search}' or '${search}' = '')

Observed effect: NPE as follow

java.lang.NullPointerException at org.apache.zeppelin.display.Input.getSimpleQuery(Input.java:376) at org.apache.zeppelin.notebook.Paragraph.jobRun(Paragraph.java:467) at org.apache.zeppelin.notebook.Paragraph.jobRun(Paragraph.java:72) at org.apache.zeppelin.scheduler.Job.run(Job.java:172) at org.apache.zeppelin.scheduler.AbstractScheduler.runJob(AbstractScheduler.java:132) at org.apache.zeppelin.scheduler.RemoteScheduler$JobRunner.run(RemoteScheduler.java:182) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748)

Expected effect: Zeppelin does not produce an NPE that the analysts can't understand.