[I] NoClassDefFoundError: io/trino/hdfs/HdfsModule when using fs.native.classpath.enabled=true with S3-only setup (MinIO [paimon-trino]

["shihkauskas (via GitHub)" <gi...@apache.org>]

shihkauskas opened a new issue, #120:
URL: https://github.com/apache/paimon-trino/issues/120

   Description
   When deploying Paimon-Trino connector in Kubernetes with a custom Trino image (based on trinodb/trino:440), I get the following error during startup:
   ```2026-02-10T08:01:29.746Z ERROR main io.trino.server.Server io/trino/hdfs/HdfsModule
   java.lang.NoClassDefFoundError: io/trino/hdfs/HdfsModule
   	at org.apache.paimon.trino.TrinoConnectorFactory.create(TrinoConnectorFactory.java:103)
   	at org.apache.paimon.trino.TrinoConnectorFactory.create(TrinoConnectorFactory.java:80)
   	at io.trino.connector.DefaultCatalogFactory.createConnector(DefaultCatalogFactory.java:200)
   	...
   ```
   
   Setup details
   
   - Trino version: 440 (official trinodb/trino:440 image)
   - Paimon-Trino version: 1.3.1 (built from source with -Dtrino.version=440)
   - Build command: mvn clean install -DskipTests -Dtrino.version=440 -Dspotless.check.skip=true
   - Plugin installation: all jars from target/paimon-trino-440-1.3.1-plugin.tar.gz copied to /usr/lib/trino/plugin/paimon/
   - **Removed** from plugin directory: hadoop-apache-*.jar, hive-thrift-*.jar, trino-hdfs-440.jar (Hadoop/HDFS not needed, only S3/MinIO)
   
   Catalog properties (etc/catalog/paimon.properties):
   ```
   connector.name=paimon
   paimon.catalog.type=filesystem
   fs.native.classpath.enabled=true
   s3.endpoint=http://***:9000
   s3.aws-access-key=***
   s3.aws-secret-key=***
   s3.path-style-access=true
   s3.ssl.enabled=false
   paimon.warehouse=s3a://paimon-dev/warehouse/
   paimon.file.format=parquet
   ```
   
   If I do NOT remove hdfs*/hadoop* jars from the plugin directory, the error changes to:
   
   ```
   2026-02-10T08:18:52.346Z ERROR main io.trino.server.Server Configuration errors:
   
   Error: An exception was caught and reported. Message: HDFS should not be on the plugin classpath
   at ConfigurationFactory.registerConfigurationClasses(ConfigurationFactory.java:186)
   ...
   ```
   
   In older issues (#96, #101, #119) people solved "HDFS should not be on the plugin classpath" by moving Hadoop jars to paimon/hdfs/ subdirectory or patching HdfsFileSystemLoader.java in Trino, but this does not solve.
   
   Thank you!
   


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