zengqinchris opened a new issue, #4637: URL: https://github.com/apache/incubator-seatunnel/issues/4637
### Search before asking - [X] I had searched in the [issues](https://github.com/apache/incubator-seatunnel/issues?q=is%3Aissue+label%3A%22bug%22) and found no similar issues. ### What happened Error reading ftp file output Console ### SeaTunnel Version V2.3.1 ### SeaTunnel Config ```conf env { execution.parallelism = 2 job.mode = "BATCH" execution.checkpoint.interval = 10000 execution.checkpoint.data-uri = "hdfs://YdBigData:9000/YdBigData/user/seatunnel/checkpoint" } source { FtpFile { path = "/home/ftpuser/upfile/test.csv" host = "0.0.0.0" port = 21 user = "xxx" password = "xxx" file_format_type = "csv" delimiter = "," schema = { fields { column0=string column1=string column2=string } } } } transform { } sink { Console { } } ``` ### Running Command ```shell ./bin/seatunnel.sh --config ./config/bb.conf ``` ### Error Exception ```log 2023-04-20 19:19:41,740 ERROR org.apache.seatunnel.core.starter.SeaTunnel - =============================================================================== 2023-04-20 19:19:41,740 ERROR org.apache.seatunnel.core.starter.SeaTunnel - Fatal Error, 2023-04-20 19:19:41,740 ERROR org.apache.seatunnel.core.starter.SeaTunnel - Please submit bug report in https://github.com/apache/incubator-seatunnel/issues 2023-04-20 19:19:41,740 ERROR org.apache.seatunnel.core.starter.SeaTunnel - Reason:SeaTunnel job executed failed 2023-04-20 19:19:41,741 ERROR org.apache.seatunnel.core.starter.SeaTunnel - Exception StackTrace:org.apache.seatunnel.core.starter.exception.CommandExecuteException: SeaTunnel job executed failed at org.apache.seatunnel.core.starter.seatunnel.command.ClientExecuteCommand.execute(ClientExecuteCommand.java:181) at org.apache.seatunnel.core.starter.SeaTunnel.run(SeaTunnel.java:40) at org.apache.seatunnel.core.starter.seatunnel.SeaTunnelClient.main(SeaTunnelClient.java:34) Caused by: org.apache.seatunnel.engine.common.exception.SeaTunnelEngineException: java.lang.LinkageError: loader constraint violation: loader (instance of sun/misc/Launcher$AppClassLoader) previously initiated loading for a different type with name "org/apache/commons/net/ftp/FTPClient" at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) at java.net.URLClassLoader.access$100(URLClassLoader.java:74) at java.net.URLClassLoader$1.run(URLClassLoader.java:369) at java.net.URLClassLoader$1.run(URLClassLoader.java:363) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:362) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.apache.hadoop.fs.ftp.FTPInputStream.<init>(FTPInputStream.java:44) at org.apache.seatunnel.connectors.seatunnel.file.ftp.system.SeaTunnelFTPFileSystem.open(SeaTunnelFTPFileSystem.java:214) at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:899) at org.apache.seatunnel.connectors.seatunnel.file.source.reader.TextReadStrategy.read(TextReadStrategy.java:66) at org.apache.seatunnel.connectors.seatunnel.file.source.BaseFileSourceReader.pollNext(BaseFileSourceReader.java:66) at org.apache.seatunnel.engine.server.task.flow.SourceFlowLifeCycle.collect(SourceFlowLifeCycle.java:135) at org.apache.seatunnel.engine.server.task.SourceSeaTunnelTask.collect(SourceSeaTunnelTask.java:84) at org.apache.seatunnel.engine.server.task.SeaTunnelTask.stateProcess(SeaTunnelTask.java:161) at org.apache.seatunnel.engine.server.task.SourceSeaTunnelTask.call(SourceSeaTunnelTask.java:89) at org.apache.seatunnel.engine.server.TaskExecutionService$BlockingWorker.run(TaskExecutionService.java:526) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) at org.apache.seatunnel.engine.client.job.ClientJobProxy.waitForJobComplete(ClientJobProxy.java:119) at org.apache.seatunnel.core.starter.seatunnel.command.ClientExecuteCommand.execute(ClientExecuteCommand.java:174) ... 2 more 2023-04-20 19:19:41,741 ERROR org.apache.seatunnel.core.starter.SeaTunnel - =============================================================================== Exception in thread "main" org.apache.seatunnel.core.starter.exception.CommandExecuteException: SeaTunnel job executed failed at org.apache.seatunnel.core.starter.seatunnel.command.ClientExecuteCommand.execute(ClientExecuteCommand.java:181) at org.apache.seatunnel.core.starter.SeaTunnel.run(SeaTunnel.java:40) at org.apache.seatunnel.core.starter.seatunnel.SeaTunnelClient.main(SeaTunnelClient.java:34) Caused by: org.apache.seatunnel.engine.common.exception.SeaTunnelEngineException: java.lang.LinkageError: loader constraint violation: loader (instance of sun/misc/Launcher$AppClassLoader) previously initiated loading for a different type with name "org/apache/commons/net/ftp/FTPClient" at java.lang.ClassLoader.defineClass1(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:763) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) at java.net.URLClassLoader.defineClass(URLClassLoader.java:468) at java.net.URLClassLoader.access$100(URLClassLoader.java:74) at java.net.URLClassLoader$1.run(URLClassLoader.java:369) at java.net.URLClassLoader$1.run(URLClassLoader.java:363) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:362) at java.lang.ClassLoader.loadClass(ClassLoader.java:424) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:349) at java.lang.ClassLoader.loadClass(ClassLoader.java:357) at org.apache.hadoop.fs.ftp.FTPInputStream.<init>(FTPInputStream.java:44) at org.apache.seatunnel.connectors.seatunnel.file.ftp.system.SeaTunnelFTPFileSystem.open(SeaTunnelFTPFileSystem.java:214) at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:899) at org.apache.seatunnel.connectors.seatunnel.file.source.reader.TextReadStrategy.read(TextReadStrategy.java:66) at org.apache.seatunnel.connectors.seatunnel.file.source.BaseFileSourceReader.pollNext(BaseFileSourceReader.java:66) at org.apache.seatunnel.engine.server.task.flow.SourceFlowLifeCycle.collect(SourceFlowLifeCycle.java:135) at org.apache.seatunnel.engine.server.task.SourceSeaTunnelTask.collect(SourceSeaTunnelTask.java:84) at org.apache.seatunnel.engine.server.task.SeaTunnelTask.stateProcess(SeaTunnelTask.java:161) at org.apache.seatunnel.engine.server.task.SourceSeaTunnelTask.call(SourceSeaTunnelTask.java:89) at org.apache.seatunnel.engine.server.TaskExecutionService$BlockingWorker.run(TaskExecutionService.java:526) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) at org.apache.seatunnel.engine.client.job.ClientJobProxy.waitForJobComplete(ClientJobProxy.java:119) at org.apache.seatunnel.core.starter.seatunnel.command.ClientExecuteCommand.execute(ClientExecuteCommand.java:174) ... 2 more ``` ### Flink or Spark Version no use flink or spark ### Java or Scala Version jdk 8 ### Screenshots _No response_ ### Are you willing to submit PR? - 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