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https://issues.apache.org/jira/browse/METRON-373?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15629897#comment-15629897
]
Nick Allen commented on METRON-373:
-----------------------------------
This has already been addressed under another JIRA.
> Unable to Call Stellar Function with No Arguments
> -------------------------------------------------
>
> Key: METRON-373
> URL: https://issues.apache.org/jira/browse/METRON-373
> Project: Metron
> Issue Type: Bug
> Reporter: Nick Allen
> Priority: Minor
> Labels: stellar
>
> Unable to call a Stellar function with no arguments. For example, when
> trying to run something like "STATS_INIT()" I get the following exception.
> It does work if I simply pass in a dummy variable like "STATS_INIT(0)".
> org.apache.metron.common.dsl.ParseException: Syntax error @ 1:11 no viable
> alternative at input 'STATS_INIT()'
> at
> org.apache.metron.common.dsl.ErrorListener.syntaxError(ErrorListener.java:34)
> at
> org.antlr.v4.runtime.ProxyErrorListener.syntaxError(ProxyErrorListener.java:65)
> at org.antlr.v4.runtime.Parser.notifyErrorListeners(Parser.java:558)
> at
> org.antlr.v4.runtime.DefaultErrorStrategy.reportNoViableAlternative(DefaultErrorStrategy.java:310)
> at
> org.antlr.v4.runtime.DefaultErrorStrategy.reportError(DefaultErrorStrategy.java:147)
> at
> org.apache.metron.common.stellar.generated.StellarParser.transformation_expr(StellarParser.java:459)
> at
> org.apache.metron.common.stellar.generated.StellarParser.transformation(StellarParser.java:145)
> at
> org.apache.metron.common.stellar.BaseStellarProcessor.parse(BaseStellarProcessor.java:52)
> at
> org.apache.metron.common.stellar.StellarStatisticalFunctionsTest.run(StellarStatisticalFunctionsTest.java:46)
> at
> org.apache.metron.common.stellar.StellarStatisticalFunctionsTest.setup(StellarStatisticalFunctionsTest.java:54)
> 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:497)
> 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.RunBefores.evaluate(RunBefores.java:24)
> 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:117)
> at
> com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
> at
> com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:253)
> at
> com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
> 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:497)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
> Caused by: org.antlr.v4.runtime.NoViableAltException
> at
> org.antlr.v4.runtime.atn.ParserATNSimulator.noViableAlt(ParserATNSimulator.java:1894)
> at
> org.antlr.v4.runtime.atn.ParserATNSimulator.execATN(ParserATNSimulator.java:498)
> at
> org.antlr.v4.runtime.atn.ParserATNSimulator.adaptivePredict(ParserATNSimulator.java:424)
> at
> org.apache.metron.common.stellar.generated.StellarParser.transformation_expr(StellarParser.java:320)
> ... 31 more
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