[FLINK-20747] ClassCastException when using MAX aggregate function

• Type: Bug
• Status: Closed
• Priority: Critical
• Resolution: Duplicate
• Affects Version/s: 1.12.0
• Fix Version/s: 1.13.0
• Component/s: Table SQL / Planner
• Assignee: Jingsong Lee
• Reporter: zengjinbo
• Created: 23/Dec/20 10:09
• Updated: 13/Apr/21 05:48
• Resolved: 13/Apr/21 05:48

Description

During the process of upgrading 1.12.0, I found that Flink SQL 1.11.1  is not compatible 

java.lang.ClassCastException: java.lang.Integer cannot be cast to org.apache.flink.table.data.StringDatajava.lang.ClassCastException: java.lang.Integer cannot be cast to org.apache.flink.table.data.StringData at org$apache$flink$table$planner$functions$aggfunctions$MaxWithRetractAggFunction$MaxWithRetractAccumulator$Converter.toInternal(Unknown Source) at org.apache.flink.table.data.conversion.StructuredObjectConverter.toInternal(StructuredObjectConverter.java:92) at org.apache.flink.table.data.conversion.StructuredObjectConverter.toInternal(StructuredObjectConverter.java:47) at org.apache.flink.table.data.conversion.DataStructureConverter.toInternalOrNull(DataStructureConverter.java:59) at GroupAggsHandler$875.getAccumulators(Unknown Source) at org.apache.flink.table.runtime.operators.aggregate.GroupAggFunction.processElement(GroupAggFunction.java:175) at org.apache.flink.table.runtime.operators.aggregate.GroupAggFunction.processElement(GroupAggFunction.java:45) at org.apache.flink.streaming.api.operators.KeyedProcessOperator.processElement(KeyedProcessOperator.java:85) at org.apache.flink.streaming.runtime.tasks.OneInputStreamTask$StreamTaskNetworkOutput.emitRecord(OneInputStreamTask.java:193) at org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.processElement(StreamTaskNetworkInput.java:179) at org.apache.flink.streaming.runtime.io.StreamTaskNetworkInput.emitNext(StreamTaskNetworkInput.java:152) at org.apache.flink.streaming.runtime.io.StreamOneInputProcessor.processInput(StreamOneInputProcessor.java:67) at org.apache.flink.streaming.runtime.tasks.StreamTask.processInput(StreamTask.java:372) at org.apache.flink.streaming.runtime.tasks.mailbox.MailboxProcessor.runMailboxLoop(MailboxProcessor.java:186) at org.apache.flink.streaming.runtime.tasks.StreamTask.runMailboxLoop(StreamTask.java:575) at org.apache.flink.streaming.runtime.tasks.StreamTask.invoke(StreamTask.java:539) at org.apache.flink.runtime.taskmanager.Task.doRun(Task.java:722) at org.apache.flink.runtime.taskmanager.Task.run(Task.java:547)

 

 

Issue Links

• is caused by: FLINK-13191 Add a simplified UDF type extraction
• is duplicated by: FLINK-21070 Overloaded aggregate functions cause converter errors