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Posted to dev@calcite.apache.org by "Daniel Glöckner (Jira)" <ji...@apache.org> on 2022/08/04 11:53:00 UTC

[jira] [Created] (CALCITE-5227) Janino upgrade breaks SELECTs with many projects causing JVM crashes

Daniel Glöckner created CALCITE-5227:
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             Summary: Janino upgrade breaks SELECTs with many projects causing JVM crashes
                 Key: CALCITE-5227
                 URL: https://issues.apache.org/jira/browse/CALCITE-5227
             Project: Calcite
          Issue Type: Bug
    Affects Versions: 1.30.0
            Reporter: Daniel Glöckner


In our case we have SELECTs with > 1000 project fields. You might say this is a bit crazy but this is how our data model looks like ;)

We recently upgraded to Calcite 1.30 and noticed JVM crashes for such SELECTs. 

After thorough analysis we found that the byte code produced by newer Janino versions is 350 times larger compared to the byte code produced by javac. 

I created a unit test to reproduce the issue in Calcite code base: https://github.com/apache/calcite/commit/f4d4815dff5537c56b34b36794c71d7a9829eec6

The Janino issue is tracked here: https://github.com/janino-compiler/janino/issues/174



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