[FLINK-19797] NPE when we use decimal array as input of UDAF

• Type: Bug
• Status: Closed
• Priority: Minor
• Resolution: Duplicate
• Component/s: Table SQL / Runtime
• Labels: auto-deprioritized-major
• Assignee: Unassigned
• Reporter: Dan Zou
• Created: 25/Oct/20 09:50
• Updated: 24/May/21 10:26
• Resolved: 24/May/21 10:26

Description

Flink version: 1.11

 

Flink throws NPE when we use decimal array as input of UDAF.
Here is a simple example:

select percentile(num, array[0.10, 0.50, 0.99]) from source

And the exception is:

Caused by: java.lang.NullPointerException: null
	at org.apache.flink.table.data.util.DataFormatConverters$BigDecimalConverter.toExternalImpl(DataFormatConverters.java:680) ~[classes/:na]
	at org.apache.flink.table.data.util.DataFormatConverters$BigDecimalConverter.toExternalImpl(DataFormatConverters.java:661) ~[classes/:na]
	at org.apache.flink.table.data.util.DataFormatConverters.arrayDataToJavaArray(DataFormatConverters.java:1195) ~[classes/:na]
	at org.apache.flink.table.data.util.DataFormatConverters.access$200(DataFormatConverters.java:104) ~[classes/:na]
	at org.apache.flink.table.data.util.DataFormatConverters$ObjectArrayConverter.toExternalImpl(DataFormatConverters.java:1148) ~[classes/:na]
	at org.apache.flink.table.data.util.DataFormatConverters$ObjectArrayConverter.toExternalImpl(DataFormatConverters.java:1095) ~[classes/:na]
	at org.apache.flink.table.data.util.DataFormatConverters$DataFormatConverter.toExternal(DataFormatConverters.java:383) ~[classes/:na]
	at NoGroupingAggregateWithoutKeys$25.processElement(Unknown Source) ~[na:na]
	at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:161) ~[classes/:na]
	at org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:183) ~[classes/:na]
	at org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:158) ~[classes/:na]
	at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:67) ~[classes/:na]
	at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:351) ~[classes/:na]
	at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxStep(MailboxProcessor.java:191) ~[classes/:na]
	at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:181) ~[classes/:na]
	at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:565) ~[classes/:na]
	at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:536) ~[classes/:na]
	at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:721) ~[classes/:na]
	at org.apache.flink.runtime.taskmanager.Task.run(Task.java:546) ~[classes/:na]
	at java.lang.Thread.run(Thread.java:748) ~[na:1.8.0_251]

Issue Links

• is duplicated by: FLINK-19796 Error results when use constant decimal array