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https://issues.apache.org/jira/browse/CAMEL-20841?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17856617#comment-17856617
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Eugene Berman commented on CAMEL-20841:
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Is there any workaround for this? We are running into this very often, not only
with Springboot, but Quarkus too,
> DataSonnet expressions are removed under memory load
> ----------------------------------------------------
>
> Key: CAMEL-20841
> URL: https://issues.apache.org/jira/browse/CAMEL-20841
> Project: Camel
> Issue Type: Bug
> Affects Versions: 4.0-M1, 4.6.0
> Reporter: Rob Ratcliffe
> Priority: Major
> Fix For: 4.4.3, 4.7.0
>
>
> *Scenario:*
> When there is a Camel/Spring Boot API project where there are a large amount
> of DataSonnet (DS) scripts
> And when the application is under memory load or runs for a long time, some
> or ALL DS scripts are removed from the mapperCache
> And once they are removed from the mapperCache, then a call to an API
> endpoint that contains that DS script will be unable to be evaluated and the
> API call will continue to fail because the expression isn't re-added to the
> mapperCache
> *What I expect to happen instead:*
> The API is able to recover and re-add missing DS scripts.
> *The error returned is:*
> {code:java}
> Caused by: java.lang.IllegalStateException: Datasonnet expression not
> initialized at
> org.apache.camel.language.datasonnet.DatasonnetExpression.lambda$doEvaluate$0(DatasonnetExpression.java:138)
> at java.base/java.util.Optional.orElseThrow(Optional.java:403) at
> org.apache.camel.language.datasonnet.DatasonnetExpression.doEvaluate(DatasonnetExpression.java:138)
> at
> org.apache.camel.language.datasonnet.DatasonnetExpression.evaluate(DatasonnetExpression.java:92){code}
>
> From what I can tell, Camel 3.7 didn't have this issue. It looks like the DS
> scripts have been stored in an LRUSoftCache for a long time and is designed
> this way so that expressions are removed to prevent OutOfMemoryError.
> However, in Camel 4 the mapper became pre-initialized and .lookup() was used
> instead of .computeIfMiss().
> Camel 3.7:
> [https://github.com/apache/camel/blob/camel-3.7.x/components/camel-datasonnet/src/main/java/org/apache/camel/language/datasonnet/DatasonnetExpression.java#L143]
> Camel 4:
> [https://github.com/apache/camel/blob/main/components/camel-datasonnet/src/main/java/org/apache/camel/language/datasonnet/DatasonnetExpression.java#L137]
> *Project that replicates this error:*
> [https://github.com/rlratcliffe/replicate-ds-error]
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