[CALCITE-3246] RelJsonReader throws NullPointerException while deserializing from JSON a call to a user-defined function (UDF)

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.22.0
• Component/s: core
• Labels: pull-request-available
• Assignee: Chunwei Lei
• Reporter: Wang Yanlin
• Created: 13/Aug/19 05:54
• Updated: 06/Mar/20 04:34
• Resolved: 06/Dec/19 02:13

Description

when deserializing of logical rel with udf operator, NPE occurs.

The exception stacktrace as follow.

java.lang.RuntimeException: java.lang.NullPointerException

	at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:181)
	at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:125)
	at org.apache.calcite.tools.Frameworks.withPlanner(Frameworks.java:143)
	at org.apache.calcite.plan.RelWriterTest.testUdf(RelWriterTest.java:598)
	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.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$2.evaluate(ParentRunner.java:268)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.NullPointerException
	at java.util.Objects.requireNonNull(Objects.java:203)
	at org.apache.calcite.rex.RexCall.<init>(RexCall.java:83)
	at org.apache.calcite.rex.RexBuilder.makeCall(RexBuilder.java:237)
	at org.apache.calcite.rel.externalize.RelJson.toRex(RelJson.java:485)
	at org.apache.calcite.rel.externalize.RelJsonReader$2.getExpressionList(RelJsonReader.java:204)
	at org.apache.calcite.rel.core.Project.<init>(Project.java:100)
	at org.apache.calcite.rel.logical.LogicalProject.<init>(LogicalProject.java:88)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
	at org.apache.calcite.rel.externalize.RelJsonReader.readRel(RelJsonReader.java:261)
	at org.apache.calcite.rel.externalize.RelJsonReader.readRels(RelJsonReader.java:91)
	at org.apache.calcite.rel.externalize.RelJsonReader.read(RelJsonReader.java:85)
	at org.apache.calcite.plan.RelWriterTest.lambda$testUdf$7(RelWriterTest.java:603)
	at org.apache.calcite.tools.Frameworks.lambda$withPlanner$0(Frameworks.java:130)
	at org.apache.calcite.prepare.CalcitePrepareImpl.perform(CalcitePrepareImpl.java:915)
	at org.apache.calcite.tools.Frameworks.withPrepare(Frameworks.java:179)
	... 25 more

Issue Links

• links to: GitHub Pull Request #1372
• links to: GitHub Pull Request #1634