[Bug]: Process files step using VFS FTP command fails with java.lang.NoClassDefFoundError: org/apache/commons/net/ProtocolCommandListener #6221
Description
Apache Hop version?
2.16
Java version?
openjdk version "17.0.17" 2025-10-21 LTS
Operating system
Windows
What happened?
Process files step fails when trying to copy file to FTP server.
Operation is Copy.
Target filename is in format ftp://myusername:mypassword@somehost/pub/downloads/somefile.tgz
Source filename C:\data\test\filename.csv
I used same target filename in Pentoho 9.3 process files step (java 11) and it worked. So it is not FTP problem.
Error came out during migration from Pentaho to Hop.
2025/12/17 09:54:34 - Process files.0 - ERROR: Unexpected error
2025/12/17 09:54:34 - Process files.0 - ERROR: java.lang.NoClassDefFoundError: org/apache/commons/net/ProtocolCommandListener
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.provider.ftp.FtpClientFactory.createConnection(FtpClientFactory.java:313)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.provider.ftp.FTPClientWrapper.createClient(FTPClientWrapper.java:123)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.provider.ftp.FTPClientWrapper.createClient(FTPClientWrapper.java:108)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.provider.ftp.FTPClientWrapper.getFtpClient(FTPClientWrapper.java:169)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.provider.ftp.FTPClientWrapper.(FTPClientWrapper.java:63)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.provider.ftp.FtpFileProvider.doCreateFileSystem(FtpFileProvider.java:71)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.getFileSystem(AbstractOriginatingFileProvider.java:100)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:60)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.provider.AbstractOriginatingFileProvider.findFile(AbstractOriginatingFileProvider.java:83)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:795)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:761)
2025/12/17 09:54:34 - Process files.0 - at org.apache.commons.vfs2.impl.DefaultFileSystemManager.resolveFile(DefaultFileSystemManager.java:826)
2025/12/17 09:54:34 - Process files.0 - at org.apache.hop.core.vfs.HopVfs.getFileObject(HopVfs.java:231)
2025/12/17 09:54:34 - Process files.0 - at org.apache.hop.pipeline.transforms.processfiles.ProcessFiles.processRow(ProcessFiles.java:105)
2025/12/17 09:54:34 - Process files.0 - at org.apache.hop.pipeline.transform.RunThread.run(RunThread.java:54)
2025/12/17 09:54:34 - Process files.0 - at java.base/java.lang.Thread.run(Thread.java:840)
2025/12/17 09:54:34 - Process files.0 - Caused by: java.lang.ClassNotFoundException: org.apache.commons.net.ProtocolCommandListener
2025/12/17 09:54:34 - Process files.0 - at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641)
2025/12/17 09:54:34 - Process files.0 - at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188)
2025/12/17 09:54:34 - Process files.0 - at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:525)
2025/12/17 09:54:34 - Process files.0 - ... 16 more
Issue Priority
Priority: 2
Issue Component
Component: Transforms