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Posted to issues@flink.apache.org by "Caizhi Weng (Jira)" <ji...@apache.org> on 2020/11/20 08:38:00 UTC
[jira] [Updated] (FLINK-20256) UDAF type inference will fail if
accumulator contains MapView with Pojo value type
[ https://issues.apache.org/jira/browse/FLINK-20256?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Caizhi Weng updated FLINK-20256:
--------------------------------
Description:
To reproduce this bug, add the following test to {{FunctionITCase.java}}.
{code:java}
public static class MyPojo implements Serializable {
public String a;
public int b;
public MyPojo(String s) {
this.a = s;
this.b = s.length();
}
}
public static class MyAcc implements Serializable {
public MapView<String, MyPojo> view = new MapView<>();
public MyAcc() {}
public void add(String a, String b) {
try {
view.put(a, new MyPojo(b));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
public static class TestUDAF extends AggregateFunction<String, MyAcc> {
@Override
public MyAcc createAccumulator() {
return new MyAcc();
}
public void accumulate(MyAcc acc, String value) {
if (value != null) {
acc.add(value, value);
}
}
@Override
public String getValue(MyAcc acc) {
return "test";
}
}
@Test
public void myTest() throws Exception {
String ddl = "create function MyACC as '" + TestUDAF.class.getName() + "'";
tEnv().executeSql(ddl).await();
try (CloseableIterator<Row> it = tEnv().executeSql("SELECT MyACC('123')").collect()) {
while (it.hasNext()) {
System.out.println(it.next());
}
}
}
{code}
And we'll get the following exception stack
{code}
java.lang.ClassCastException: org.apache.flink.table.types.AtomicDataType cannot be cast to org.apache.flink.table.types.KeyValueDataType
at org.apache.flink.table.planner.typeutils.DataViewUtils$MapViewSpec.getKeyDataType(DataViewUtils.java:257)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1$$anonfun$22.apply(AggsHandlerCodeGenerator.scala:1231)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1$$anonfun$22.apply(AggsHandlerCodeGenerator.scala:1231)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$.org$apache$flink$table$planner$codegen$agg$AggsHandlerCodeGenerator$$addReusableDataViewSerializer(AggsHandlerCodeGenerator.scala:1294)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1.apply(AggsHandlerCodeGenerator.scala:1228)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1.apply(AggsHandlerCodeGenerator.scala:1211)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$.addReusableStateDataViews(AggsHandlerCodeGenerator.scala:1211)
at org.apache.flink.table.planner.codegen.agg.ImperativeAggCodeGen.<init>(ImperativeAggCodeGen.scala:112)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$3.apply(AggsHandlerCodeGenerator.scala:233)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$3.apply(AggsHandlerCodeGenerator.scala:214)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.mutable.ArrayOps$ofRef.map(ArrayOps.scala:186)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator.initialAggregateInformation(AggsHandlerCodeGenerator.scala:214)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator.generateAggsHandler(AggsHandlerCodeGenerator.scala:325)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecGroupAggregate.translateToPlanInternal(StreamExecGroupAggregate.scala:143)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecGroupAggregate.translateToPlanInternal(StreamExecGroupAggregate.scala:52)
at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:59)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecGroupAggregate.translateToPlan(StreamExecGroupAggregate.scala:52)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToTransformation(StreamExecLegacySink.scala:163)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToPlanInternal(StreamExecLegacySink.scala:83)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToPlanInternal(StreamExecLegacySink.scala:49)
at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:59)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToPlan(StreamExecLegacySink.scala:49)
at org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$translateToPlan$1.apply(StreamPlanner.scala:78)
at org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$translateToPlan$1.apply(StreamPlanner.scala:77)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.Iterator$class.foreach(Iterator.scala:891)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.AbstractTraversable.map(Traversable.scala:104)
at org.apache.flink.table.planner.delegation.StreamPlanner.translateToPlan(StreamPlanner.scala:77)
at org.apache.flink.table.planner.delegation.PlannerBase.translate(PlannerBase.scala:167)
at org.apache.flink.table.planner.delegation.StreamPlanner.translate(StreamPlanner.scala:69)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.translate(TableEnvironmentImpl.java:1261)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeInternal(TableEnvironmentImpl.java:702)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeOperation(TableEnvironmentImpl.java:1065)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeSql(TableEnvironmentImpl.java:664)
at org.apache.flink.table.planner.runtime.stream.sql.FunctionITCase.myTest(FunctionITCase.java:197)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
{code}
However {{MapView<String, String>}} will be alright.
was:
To reproduce this bug, add the following test to {{FunctionITCase.java}}.
{code:java}
public static class MyPojo implements Serializable {
public String a;
public int b;
public MyPojo(String s) {
this.a = s;
this.b = s.length();
}
}
public static class MyAcc implements Serializable {
public MapView<String, MyPojo> view = new MapView<>();
public MyAcc() {}
public void add(String a, String b) {
try {
view.put(a, new MyPojo(b));
} catch (Exception e) {
throw new RuntimeException(e);
}
}
}
public static class TestUDAF extends AggregateFunction<String, MyAcc> {
@Override
public MyAcc createAccumulator() {
return new MyAcc();
}
public void accumulate(MyAcc acc, String value) {
if (value != null) {
acc.add(value, value);
}
}
@Override
public String getValue(MyAcc acc) {
return "test";
}
}
@Test
public void myTest() throws Exception {
String ddl = "create function MyACC as '" + TestUDAF.class.getName() + "'";
tEnv().executeSql(ddl).await();
try (CloseableIterator<Row> it = tEnv().executeSql("SELECT MyACC('123')").collect()) {
while (it.hasNext()) {
System.out.println(it.next());
}
}
}
{code}
And we'll get the following exception stack
{code}
java.lang.ClassCastException: org.apache.flink.table.types.AtomicDataType cannot be cast to org.apache.flink.table.types.KeyValueDataType
at org.apache.flink.table.planner.typeutils.DataViewUtils$MapViewSpec.getKeyDataType(DataViewUtils.java:257)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1$$anonfun$22.apply(AggsHandlerCodeGenerator.scala:1231)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1$$anonfun$22.apply(AggsHandlerCodeGenerator.scala:1231)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$.org$apache$flink$table$planner$codegen$agg$AggsHandlerCodeGenerator$$addReusableDataViewSerializer(AggsHandlerCodeGenerator.scala:1294)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1.apply(AggsHandlerCodeGenerator.scala:1228)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1.apply(AggsHandlerCodeGenerator.scala:1211)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$.addReusableStateDataViews(AggsHandlerCodeGenerator.scala:1211)
at org.apache.flink.table.planner.codegen.agg.ImperativeAggCodeGen.<init>(ImperativeAggCodeGen.scala:112)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$3.apply(AggsHandlerCodeGenerator.scala:233)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$3.apply(AggsHandlerCodeGenerator.scala:214)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.mutable.ArrayOps$ofRef.map(ArrayOps.scala:186)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator.initialAggregateInformation(AggsHandlerCodeGenerator.scala:214)
at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator.generateAggsHandler(AggsHandlerCodeGenerator.scala:325)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecGroupAggregate.translateToPlanInternal(StreamExecGroupAggregate.scala:143)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecGroupAggregate.translateToPlanInternal(StreamExecGroupAggregate.scala:52)
at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:59)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecGroupAggregate.translateToPlan(StreamExecGroupAggregate.scala:52)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToTransformation(StreamExecLegacySink.scala:163)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToPlanInternal(StreamExecLegacySink.scala:83)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToPlanInternal(StreamExecLegacySink.scala:49)
at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:59)
at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToPlan(StreamExecLegacySink.scala:49)
at org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$translateToPlan$1.apply(StreamPlanner.scala:78)
at org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$translateToPlan$1.apply(StreamPlanner.scala:77)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
at scala.collection.Iterator$class.foreach(Iterator.scala:891)
at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
at scala.collection.AbstractTraversable.map(Traversable.scala:104)
at org.apache.flink.table.planner.delegation.StreamPlanner.translateToPlan(StreamPlanner.scala:77)
at org.apache.flink.table.planner.delegation.PlannerBase.translate(PlannerBase.scala:167)
at org.apache.flink.table.planner.delegation.StreamPlanner.translate(StreamPlanner.scala:69)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.translate(TableEnvironmentImpl.java:1261)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeInternal(TableEnvironmentImpl.java:702)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeOperation(TableEnvironmentImpl.java:1065)
at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeSql(TableEnvironmentImpl.java:664)
at org.apache.flink.table.planner.runtime.stream.sql.FunctionITCase.myTest(FunctionITCase.java:197)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
{code}
> UDAF type inference will fail if accumulator contains MapView with Pojo value type
> ----------------------------------------------------------------------------------
>
> Key: FLINK-20256
> URL: https://issues.apache.org/jira/browse/FLINK-20256
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Reporter: Caizhi Weng
> Priority: Blocker
> Fix For: 1.12.0
>
>
> To reproduce this bug, add the following test to {{FunctionITCase.java}}.
> {code:java}
> public static class MyPojo implements Serializable {
> public String a;
> public int b;
> public MyPojo(String s) {
> this.a = s;
> this.b = s.length();
> }
> }
> public static class MyAcc implements Serializable {
> public MapView<String, MyPojo> view = new MapView<>();
> public MyAcc() {}
> public void add(String a, String b) {
> try {
> view.put(a, new MyPojo(b));
> } catch (Exception e) {
> throw new RuntimeException(e);
> }
> }
> }
> public static class TestUDAF extends AggregateFunction<String, MyAcc> {
> @Override
> public MyAcc createAccumulator() {
> return new MyAcc();
> }
> public void accumulate(MyAcc acc, String value) {
> if (value != null) {
> acc.add(value, value);
> }
> }
> @Override
> public String getValue(MyAcc acc) {
> return "test";
> }
> }
> @Test
> public void myTest() throws Exception {
> String ddl = "create function MyACC as '" + TestUDAF.class.getName() + "'";
> tEnv().executeSql(ddl).await();
> try (CloseableIterator<Row> it = tEnv().executeSql("SELECT MyACC('123')").collect()) {
> while (it.hasNext()) {
> System.out.println(it.next());
> }
> }
> }
> {code}
> And we'll get the following exception stack
> {code}
> java.lang.ClassCastException: org.apache.flink.table.types.AtomicDataType cannot be cast to org.apache.flink.table.types.KeyValueDataType
> at org.apache.flink.table.planner.typeutils.DataViewUtils$MapViewSpec.getKeyDataType(DataViewUtils.java:257)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1$$anonfun$22.apply(AggsHandlerCodeGenerator.scala:1231)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1$$anonfun$22.apply(AggsHandlerCodeGenerator.scala:1231)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$.org$apache$flink$table$planner$codegen$agg$AggsHandlerCodeGenerator$$addReusableDataViewSerializer(AggsHandlerCodeGenerator.scala:1294)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1.apply(AggsHandlerCodeGenerator.scala:1228)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$addReusableStateDataViews$1.apply(AggsHandlerCodeGenerator.scala:1211)
> at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
> at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$.addReusableStateDataViews(AggsHandlerCodeGenerator.scala:1211)
> at org.apache.flink.table.planner.codegen.agg.ImperativeAggCodeGen.<init>(ImperativeAggCodeGen.scala:112)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$3.apply(AggsHandlerCodeGenerator.scala:233)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator$$anonfun$3.apply(AggsHandlerCodeGenerator.scala:214)
> at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
> at scala.collection.mutable.ArrayOps$ofRef.foreach(ArrayOps.scala:186)
> at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
> at scala.collection.mutable.ArrayOps$ofRef.map(ArrayOps.scala:186)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator.initialAggregateInformation(AggsHandlerCodeGenerator.scala:214)
> at org.apache.flink.table.planner.codegen.agg.AggsHandlerCodeGenerator.generateAggsHandler(AggsHandlerCodeGenerator.scala:325)
> at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecGroupAggregate.translateToPlanInternal(StreamExecGroupAggregate.scala:143)
> at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecGroupAggregate.translateToPlanInternal(StreamExecGroupAggregate.scala:52)
> at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:59)
> at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecGroupAggregate.translateToPlan(StreamExecGroupAggregate.scala:52)
> at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToTransformation(StreamExecLegacySink.scala:163)
> at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToPlanInternal(StreamExecLegacySink.scala:83)
> at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToPlanInternal(StreamExecLegacySink.scala:49)
> at org.apache.flink.table.planner.plan.nodes.exec.ExecNode$class.translateToPlan(ExecNode.scala:59)
> at org.apache.flink.table.planner.plan.nodes.physical.stream.StreamExecLegacySink.translateToPlan(StreamExecLegacySink.scala:49)
> at org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$translateToPlan$1.apply(StreamPlanner.scala:78)
> at org.apache.flink.table.planner.delegation.StreamPlanner$$anonfun$translateToPlan$1.apply(StreamPlanner.scala:77)
> at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at scala.collection.TraversableLike$$anonfun$map$1.apply(TraversableLike.scala:234)
> at scala.collection.Iterator$class.foreach(Iterator.scala:891)
> at scala.collection.AbstractIterator.foreach(Iterator.scala:1334)
> at scala.collection.IterableLike$class.foreach(IterableLike.scala:72)
> at scala.collection.AbstractIterable.foreach(Iterable.scala:54)
> at scala.collection.TraversableLike$class.map(TraversableLike.scala:234)
> at scala.collection.AbstractTraversable.map(Traversable.scala:104)
> at org.apache.flink.table.planner.delegation.StreamPlanner.translateToPlan(StreamPlanner.scala:77)
> at org.apache.flink.table.planner.delegation.PlannerBase.translate(PlannerBase.scala:167)
> at org.apache.flink.table.planner.delegation.StreamPlanner.translate(StreamPlanner.scala:69)
> at org.apache.flink.table.api.internal.TableEnvironmentImpl.translate(TableEnvironmentImpl.java:1261)
> at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeInternal(TableEnvironmentImpl.java:702)
> at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeOperation(TableEnvironmentImpl.java:1065)
> at org.apache.flink.table.api.internal.TableEnvironmentImpl.executeSql(TableEnvironmentImpl.java:664)
> at org.apache.flink.table.planner.runtime.stream.sql.FunctionITCase.myTest(FunctionITCase.java:197)
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> at java.lang.reflect.Method.invoke(Method.java:498)
> at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
> at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
> at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
> at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
> at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
> at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
> at org.junit.rules.ExpectedException$ExpectedExceptionStatement.evaluate(ExpectedException.java:239)
> at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
> at org.junit.rules.TestWatcher$1.evaluate(TestWatcher.java:55)
> at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
> at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
> at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
> at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
> at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
> at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
> at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
> at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
> at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
> at org.junit.rules.ExternalResource$1.evaluate(ExternalResource.java:48)
> at org.junit.rules.RunRules.evaluate(RunRules.java:20)
> at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
> at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
> at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
> at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
> at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
> at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
> {code}
> However {{MapView<String, String>}} will be alright.
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