java.lang.NoClassDefFoundError: com/github/benmanes/caffeine/cache/tracing/Tracer when used in OSGI container

[alexander-riss]

the cache.tracing package is not exported and in this way not visible when creating e.g. a LocalCache:

java.lang.NoClassDefFoundError: com/github/benmanes/caffeine/cache/tracing/Tracer
at com.github.benmanes.caffeine.cache.LocalCache.tracer(LocalCache.java:64)
at com.github.benmanes.caffeine.cache.BoundedLocalCache.(BoundedLocalCache.java:139)
at com.github.benmanes.caffeine.cache.LocalCacheFactory$SS.(LocalCacheFactory.java:12966)
at com.github.benmanes.caffeine.cache.LocalCacheFactory$SSMS.(LocalCacheFactory.java:23034)
at com.github.benmanes.caffeine.cache.LocalCacheFactory$SSMSA.(LocalCacheFactory.java:23079)
at com.github.benmanes.caffeine.cache.LocalCacheFactory.newBoundedLocalCache(LocalCacheFactory.java:795)
at com.github.benmanes.caffeine.cache.BoundedLocalCache$BoundedLocalManualCache.(BoundedLocalCache.java:1779)
at com.github.benmanes.caffeine.cache.BoundedLocalCache$BoundedLocalManualCache.(BoundedLocalCache.java:1775)
at com.github.benmanes.caffeine.cache.Caffeine.build(Caffeine.java:814)

[ben-manes]

Sorry that I haven't used OSGi so it's not tested, but I thought the bundle instructions were correct. The tracing jar is built with,

bundle {
  instruction 'Export-Package', 'com.github.benmanes.caffeine.cache.tracing.*'
}

[alexander-riss]

ah ok i did not realise that there are transitive dependencies - i'll give it a try

[alexander-riss]

i added the tracing-api bundle but as it seems this does not help much, since the com.github.ben-manes.caffeine is not importing the tracing bundle.

So adding that import would probably fix the issue and document this runtime dependency all at once

[ben-manes]

That makes sense that I missed the Import-Package. If there's an easy way to run an OSGi container in a unit test to verify compatibility, I'd appreciate some pointers. The fix should be available in the snapshot repository when the CI passes (~25 minutes) if you'd like to verify.

The tracing package will probably be removed in v2 since we collected enough data to simulate policies and choose an optimal one to replace LRU.

[ben-manes]

I probably need an import statement for the guava jar too...

[ben-manes]

Release v2.0 which fixes the OSGi manifests. It also removes the tracing packages, which are no longer needed due to choosing a new eviction policy. Sorry this took so long to release.

[gvsharma]

having this same issue with spring container, any suggestions?

[ben-manes]

I guess you're referring to this StackOverflow issue? I think you are supposed to use Spring's CaffeineCacheManager, but I am not very familiar with Spring these days.

[gvsharma]

Thank you for your reply, resolved the issue

…

On Tue, Sep 17, 2019, 12:23 AM Ben Manes ***@***.***> wrote: I guess you're referring to this StackOverflow issue <https://stackoverflow.com/questions/57962520/caffeine-cache-cannot-be-cast-to-org-springframework-cache-cache>? I think you are supposed to use Spring's CaffeineCacheManager, but I am not very familiar with Spring these days. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#29?email_source=notifications&email_token=ABSXCWEB4T43KIGDZJEOA3TQJ7IYZA5CNFSM4BQDV2G2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGOD62EWMQ#issuecomment-531909426>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABSXCWAEWSO632CYJMVJD23QJ7IYZANCNFSM4BQDV2GQ> .