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https://issues.apache.org/jira/browse/GROOVY-11126?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17744972#comment-17744972
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Jochen Theodorou commented on GROOVY-11126:
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[~daniel_sun]it is not a spread call, it is a safeNavigation call. For me
things point to the caching, but why exactly no idea. I could imagine that
there is a point where the SoftReference is cleared or the cache emptied. And
then somehow the safe navigation flag is lost.... I have found no pointers in
the code that would back this though. I guess we would need to experiment where
we manually clear the cache or the reference to try to reproduce the problem.
> Null-safe Dereference fails after time
> --------------------------------------
>
> Key: GROOVY-11126
> URL: https://issues.apache.org/jira/browse/GROOVY-11126
> Project: Groovy
> Issue Type: Bug
> Components: bytecode
> Affects Versions: 4.0.11, 4.0.12
> Environment: Zulu Java 17.0.7, Amazon Linux 2023, Spring Boot 3.1.1
> Reporter: Kenneth W DeLong
> Priority: Critical
> Attachments: javapOutput.txt, javapOutput2.txt
>
>
> I have a server-side app that works perfectly for a long time (18-24h) then
> suddenly starts throwing "impossible" errors.
> {code:java}
> Caused by: java.lang.NullPointerException: Cannot invoke
> "java.lang.CharSequence.length()" because "self" is null
> at
> org.codehaus.groovy.runtime.StringGroovyMethods.size(StringGroovyMethods.java:2693)
> at org.codehaus.groovy.runtime.dgm$1323.doMethodInvoke(Unknown Source)
> at
> com.hatchbaby.model.ColorParser.isOneByteFormat(ColorParser.groovy:74)
> at com.hatchbaby.model.ColorParser.getRed(ColorParser.groovy:13)
> at com.hatchbaby.domain.Content.getRed(Content.groovy:173)
> {code}
> The line of code at ColorParser:74 is:
> {code:java}
> int size = color?.size() ?: 0 {code}
> The variable `color` is a String. The null-safe dereference operator has
> ceased to short-circuit.
> This code is years old and has run flawlessly. Since the upgrade from Spring
> Boot 2.7.4 to Boot 3.1.1, it runs fine for 18-24h, then it starts throwing
> NullPointerExceptions. This is happening at a couple of other places in the
> code, all on null-safe dereferences that don't short-circuit. The above code
> is hit 9,000+ times/day. We have a cluster of servers and they seem to
> develop the problem within a couple hours of each other.
> The server is running with Spring Boot 3.1.1 (hence Groovy 4.0.12) running on
> Java 17.0.7 (Azul Zulu) on Amazon Linux 2023. The project is joint Java and
> Groovy code that is compiled with the GMavenPlus 3.0.0 Maven plugin (maven
> 3.9.1)
> I have tried to reproduce the error by running a tiny program that mimics the
> error, but so far after running 1.4 million invocations over 24h with no
> errors (as you might expect).
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