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https://issues.apache.org/jira/browse/DRILL-4946?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15581070#comment-15581070
 ] 

Jacques Nadeau commented on DRILL-4946:
---------------------------------------

For reference: the scalar replacement code is known to not work in some 
situations. In those situations, in production, we fallback to skipping it 
since it is simply a performance optimization. In development tests we fail 
queries so we don't accidentally introduce scalar replacement regressions.

> org.objectweb.asm.tree.analysis.AnalyzerException printed to console in 
> embedded mode
> -------------------------------------------------------------------------------------
>
>                 Key: DRILL-4946
>                 URL: https://issues.apache.org/jira/browse/DRILL-4946
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Chunhui Shi
>            Assignee: Chunhui Shi
>            Priority: Critical
>
> Testing by querying a json file got AnalyzerException printed. 
> The problem was due to scalar_replacement mode is default to be 'try', and 
> org.objectweb.asm.util.CheckMethodAdapter is printing stack trace to stderr. 
> [shi@cshi-centos1 private-drill]$ cat /tmp/conv.json 
> {"row": "0", "key": "\\x4a\\x31\\x39\\x38", "key2": "4a313938", "kp1": 
> "4a31", "kp2": "38"}
> {"row": "1", "key": null, "key2": null, "kp1": null, "kp2": null}
> {"row": "2", "key": "\\x4e\\x4f\\x39\\x51", "key2": "4e4f3951", "kp1": 
> "4e4f", "kp2": "51"}
> {"row": "3", "key": "\\x6e\\x6f\\x39\\x31", "key2": "6e6f3931", "kp1": 
> "6e6f", "kp2": "31"}
> 0: jdbc:drill:zk=local> SELECT convert_from(binary_string(key), 'INT_BE') as 
> intkey from dfs.`/tmp/conv.json`;
> org.objectweb.asm.tree.analysis.AnalyzerException: Error at instruction 158: 
> Expected an object reference, but found .
>       at org.objectweb.asm.tree.analysis.Analyzer.analyze(Analyzer.java:294)
>       at 
> org.objectweb.asm.util.CheckMethodAdapter$1.visitEnd(CheckMethodAdapter.java:450)
>       at org.objectweb.asm.MethodVisitor.visitEnd(MethodVisitor.java:877)
>       at 
> org.objectweb.asm.util.CheckMethodAdapter.visitEnd(CheckMethodAdapter.java:1028)
>       at org.objectweb.asm.MethodVisitor.visitEnd(MethodVisitor.java:877)
>       at 
> org.apache.drill.exec.compile.CheckMethodVisitorFsm.visitEnd(CheckMethodVisitorFsm.java:114)
>       at org.objectweb.asm.MethodVisitor.visitEnd(MethodVisitor.java:877)
>       at 
> org.apache.drill.exec.compile.CheckMethodVisitorFsm.visitEnd(CheckMethodVisitorFsm.java:114)
>       at org.objectweb.asm.MethodVisitor.visitEnd(MethodVisitor.java:877)
>       at org.objectweb.asm.MethodVisitor.visitEnd(MethodVisitor.java:877)
>       at 
> org.apache.drill.exec.compile.bytecode.InstructionModifier.visitEnd(InstructionModifier.java:508)
>       at org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:837)
>       at 
> org.apache.drill.exec.compile.bytecode.ScalarReplacementNode.visitEnd(ScalarReplacementNode.java:87)
>       at org.objectweb.asm.MethodVisitor.visitEnd(MethodVisitor.java:877)
>       at 
> org.apache.drill.exec.compile.bytecode.AloadPopRemover.visitEnd(AloadPopRemover.java:136)
>       at org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:837)
>       at org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:726)
>       at org.objectweb.asm.tree.ClassNode.accept(ClassNode.java:412)
>       at 
> org.apache.drill.exec.compile.MergeAdapter.getMergedClass(MergeAdapter.java:223)
>       at 
> org.apache.drill.exec.compile.ClassTransformer.getImplementationClass(ClassTransformer.java:263)
>       at 
> org.apache.drill.exec.compile.CodeCompiler$Loader.load(CodeCompiler.java:78)
>       at 
> org.apache.drill.exec.compile.CodeCompiler$Loader.load(CodeCompiler.java:74)
>       at 
> com.google.common.cache.LocalCache$LoadingValueReference.loadFuture(LocalCache.java:3527)
>       at 
> com.google.common.cache.LocalCache$Segment.loadSync(LocalCache.java:2319)
>       at 
> com.google.common.cache.LocalCache$Segment.lockedGetOrLoad(LocalCache.java:2282)
>       at com.google.common.cache.LocalCache$Segment.get(LocalCache.java:2197)
>       at com.google.common.cache.LocalCache.get(LocalCache.java:3937)
>       at com.google.common.cache.LocalCache.getOrLoad(LocalCache.java:3941)
>       at 
> com.google.common.cache.LocalCache$LocalLoadingCache.get(LocalCache.java:4824)
>       at 
> org.apache.drill.exec.compile.CodeCompiler.getImplementationClass(CodeCompiler.java:63)
>       at 
> org.apache.drill.exec.compile.CodeCompiler.getImplementationClass(CodeCompiler.java:56)
>       at 
> org.apache.drill.exec.ops.FragmentContext.getImplementationClass(FragmentContext.java:310)
>       at 
> org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.setupNewSchema(ProjectRecordBatch.java:484)
>       at 
> org.apache.drill.exec.record.AbstractSingleRecordBatch.innerNext(AbstractSingleRecordBatch.java:78)
>       at 
> org.apache.drill.exec.physical.impl.project.ProjectRecordBatch.innerNext(ProjectRecordBatch.java:135)
>       at 
> org.apache.drill.exec.record.AbstractRecordBatch.next(AbstractRecordBatch.java:162)
>       at 
> org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:104)
>       at 
> org.apache.drill.exec.physical.impl.ScreenCreator$ScreenRoot.innerNext(ScreenCreator.java:81)
>       at 
> org.apache.drill.exec.physical.impl.BaseRootExec.next(BaseRootExec.java:94)
>       at 
> org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:232)
>       at 
> org.apache.drill.exec.work.fragment.FragmentExecutor$1.run(FragmentExecutor.java:226)
>       at java.security.AccessController.doPrivileged(Native Method)
>       at javax.security.auth.Subject.doAs(Subject.java:415)
>       at 
> org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
>       at 
> org.apache.drill.exec.work.fragment.FragmentExecutor.run(FragmentExecutor.java:226)
>       at 
> org.apache.drill.common.SelfCleaningRunnable.run(SelfCleaningRunnable.java:38)
>       at 
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
>       at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
>       at java.lang.Thread.run(Thread.java:745)
> Caused by: org.objectweb.asm.tree.analysis.AnalyzerException: Expected an 
> object reference, but found .
>       at 
> org.objectweb.asm.tree.analysis.BasicVerifier.copyOperation(BasicVerifier.java:80)
>       at 
> org.objectweb.asm.tree.analysis.BasicVerifier.copyOperation(BasicVerifier.java:47)
>       at org.objectweb.asm.tree.analysis.Frame.execute(Frame.java:276)
>       at org.objectweb.asm.tree.analysis.Analyzer.analyze(Analyzer.java:199)
>       ... 48 more
> +-------------+
> |   intkey    |
> +-------------+
> | 1244739896  |
> | null        |
> | 1313814865  |
> | 1852782897  |
> +-------------+



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