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https://issues.apache.org/jira/browse/DELTASPIKE-1397?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Mark Struberg resolved DELTASPIKE-1397.
---------------------------------------
Resolution: Fixed
txs for the report, hopefully fixed in a usable way.
> Detect the cycled variable references
> -------------------------------------
>
> Key: DELTASPIKE-1397
> URL: https://issues.apache.org/jira/browse/DELTASPIKE-1397
> Project: DeltaSpike
> Issue Type: Wish
> Security Level: public(Regular issues)
> Components: Configuration
> Affects Versions: 1.9.1
> Environment: JDK 1.8
> Reporter: Andrew Marinchuk
> Assignee: Mark Struberg
> Priority: Major
> Fix For: 1.9.4
>
>
> Due to mistake in config file, we encountered the
> java.lang.StackOverflowError.
> {code:title=properties}fs.docs.path=/opt/docsFolder
> fs.docs.path.IntegrationTest=/mnt/targetDocs
> fs.docs.path.Staging=${fs.docs.path.IntegrationTest}
> fs.docs.path.IntegrationTest=${fs.docs.path.IntegrationTest} <------- here is
> invalid copy-pasted string
> fs.docs.path.Production=${fs.docs.path.IntegrationTest}{code}{code:title=stack
> trace}....
> at
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.getValue(TypedResolverImpl.java:253)
>
> at
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.resolveVariables(TypedResolverImpl.java:556)
>
> at
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.getPropertyValue(TypedResolverImpl.java:590)
>
> at
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.resolveStringValue(TypedResolverImpl.java:436)
>
> at
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.getValue(TypedResolverImpl.java:253)
>
> at
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.resolveVariables(TypedResolverImpl.java:556)
>
> at
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.getPropertyValue(TypedResolverImpl.java:590)
>
> at
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.resolveStringValue(TypedResolverImpl.java:436)
>
> at
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.getValue(TypedResolverImpl.java:253)
> {code}
> It's very hard to find the configuration variable with a self-referencing
> problem because StackOverflowError's message does not contain information
> about variable with problem.
> Wrapping each TypedResolver.getValue()'s call into try-catch is not the best
> practice in app code, but it's possible to detect the simplest
> self-referencing issues in
> org.apache.deltaspike.core.impl.config.TypedResolverImpl.resolveVariables(String).
> The better (but much expensive) way is to track the reference chain during
> resolving variables or catching the StackOverflowError in library's code
> (it's not a good practice and will not help to find the core of reference
> loop because try-catch should be done at the first TypedResolver.getValue()'s
> call).
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