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# troubleshooting
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Slackbot
03/16/2023, 3:01 PM
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Martijn Visser
03/16/2023, 4:59 PM
I'm not sure what you're trying to achieve by adding the Scala 2.12.8 library to the classpath
Martijn Visser
03/16/2023, 4:59 PM
If you want to use a higher version of Scala with your Flink application, you'll need to recompile Flink with the higher Scala version
Martijn Visser
03/16/2023, 5:00 PM
You also shouldn't add Hadoop dependencies, but set a HADOOP_CLASSPATH if you want to use Hadoop. See
https://nightlies.apache.org/flink/flink-docs-master/docs/dev/configuration/advanced/#hadoop-dependencies
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Emmanuel Leroy
03/16/2023, 10:09 PM
+ Flink 1.16 used hadoop 3.3.4 not 3.3.2
Emmanuel Leroy
03/17/2023, 2:06 AM
Mmm flink-fs-s3-hadoop for 1.16 uses 3.3.4 for sure so it must be shaded.
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