Stamatis Zampetakis created HIVE-24104:
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Summary: NPE due to null key columns in ReduceSink after
deduplication
Key: HIVE-24104
URL: https://issues.apache.org/jira/browse/HIVE-24104
Project: Hive
Issue Type: Bug
Components: Physical Optimizer
Reporter: Stamatis Zampetakis
Assignee: Stamatis Zampetakis
In some cases the {{ReduceSinkDeDuplication}} optimization creates ReduceSink
operators where the key columns are null. This can lead to NPE in various
places in the code.
The following stracktrace shows an example where NPE is raised due to key
columns being null.
{noformat}
java.lang.NullPointerException
at
org.apache.hadoop.hive.ql.plan.ExprNodeDesc$ExprNodeDescEqualityWrapper.equals(ExprNodeDesc.java:141)
at java.util.AbstractList.equals(AbstractList.java:523)
at
org.apache.hadoop.hive.ql.optimizer.SetReducerParallelism.process(SetReducerParallelism.java:101)
at
org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:90)
at
org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatchAndReturn(DefaultGraphWalker.java:105)
at
org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:89)
at
org.apache.hadoop.hive.ql.lib.ForwardWalker.walk(ForwardWalker.java:74)
at
org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:120)
at
org.apache.hadoop.hive.ql.parse.TezCompiler.runStatsDependentOptimizations(TezCompiler.java:492)
at
org.apache.hadoop.hive.ql.parse.TezCompiler.optimizeOperatorPlan(TezCompiler.java:226)
at
org.apache.hadoop.hive.ql.parse.TaskCompiler.compile(TaskCompiler.java:161)
at
org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:12643)
at
org.apache.hadoop.hive.ql.parse.CalcitePlanner.analyzeInternal(CalcitePlanner.java:443)
at
org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:301)
at
org.apache.hadoop.hive.ql.parse.ExplainSemanticAnalyzer.analyzeInternal(ExplainSemanticAnalyzer.java:171)
at
org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:301)
at org.apache.hadoop.hive.ql.Compiler.analyze(Compiler.java:220)
at org.apache.hadoop.hive.ql.Compiler.compile(Compiler.java:104)
at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:173)
at org.apache.hadoop.hive.ql.Driver.compileInternal(Driver.java:414)
at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:363)
at org.apache.hadoop.hive.ql.Driver.compileAndRespond(Driver.java:357)
at
org.apache.hadoop.hive.ql.reexec.ReExecDriver.compileAndRespond(ReExecDriver.java:129)
at
org.apache.hadoop.hive.ql.reexec.ReExecDriver.run(ReExecDriver.java:231)
at
org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:258)
at org.apache.hadoop.hive.cli.CliDriver.processCmd1(CliDriver.java:203)
at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:129)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:424)
at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:355)
at
org.apache.hadoop.hive.ql.QTestUtil.executeClientInternal(QTestUtil.java:740)
at org.apache.hadoop.hive.ql.QTestUtil.executeClient(QTestUtil.java:710)
at
org.apache.hadoop.hive.cli.control.CoreCliDriver.runTest(CoreCliDriver.java:170)
at
org.apache.hadoop.hive.cli.control.CliAdapter.runTest(CliAdapter.java:157)
at
org.apache.hadoop.hive.cli.TestMiniLlapLocalCliDriver.testCliDriver(TestMiniLlapLocalCliDriver.java:62)
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:59)
at
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at
org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
at
org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at
org.apache.hadoop.hive.cli.control.CliAdapter$2$1.evaluate(CliAdapter.java:135)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at
org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
at
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at org.junit.runners.Suite.runChild(Suite.java:128)
at org.junit.runners.Suite.runChild(Suite.java:27)
at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
at
org.apache.hadoop.hive.cli.control.CliAdapter$1$1.evaluate(CliAdapter.java:95)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
at
org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:365)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:273)
at
org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:238)
at
org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:159)
at
org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:377)
at
org.apache.maven.surefire.booter.ForkedBooter.execute(ForkedBooter.java:138)
at
org.apache.maven.surefire.booter.ForkedBooter.run(ForkedBooter.java:465)
at
org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:451)
{noformat}
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