custom-dynclass-loader - Githubissues

tabular-io / iceberg-kafka-connect

Apache License 2.0

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Closed tabmatfournier closed 6 months ago

tabmatfournier commented 6 months ago

we produce a -hive and a not hive version of the connector. Due to how we strip the packages, some Kafka Connect clusters can throw a NoClassDefFound error when it cannot find hadoop/hive in the non-hive version when trying to detect hive/hadoop (e.g. when using a rest catalog). This is fine, however the reflection code we use only converts ClassPathNotFound to nulls. Wrap the calls to DynClasses to catch the NoClassDefFound due to the jar stripping.

tabmatfournier commented 6 months ago

Tested on confluent cloud:

0.6.13 no hive version published on confluent hub -> throws NoClassDefFound during loading of catalog, even though we don't use hive/hadoop

0.6.13 hive version (manually uploaded) -> works

0.6.13 this version w/ the alternate DynClass manually uploaded, no hive version -> works