org.apache.commons.net.ftp.FTPConnectionClosedException: FTP response 421 received. Server closed connection.

YouTrack | 5 months ago
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Root Cause Analysis

  1. org.apache.commons.net.ftp.FTPConnectionClosedException

    FTP response 421 received. Server closed connection.

    at org.apache.commons.net.ftp.FTP.__getReply()
  2. Commons Net
    FTP.noop
    1. org.apache.commons.net.ftp.FTP.__getReply(FTP.java:367)
    2. org.apache.commons.net.ftp.FTP.__getReply(FTP.java:294)
    3. org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:483)
    4. org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:608)
    5. org.apache.commons.net.ftp.FTP.sendCommand(FTP.java:582)
    6. org.apache.commons.net.ftp.FTP.noop(FTP.java:1763)
    6 frames
  3. Commons VFS Core
    JBFtpKeepAliveCommand$1.invoke
    1. org.apache.commons.vfs2.provider.ftp.FTPClientWrapper.noop(FTPClientWrapper.java:488)
    2. org.apache.commons.vfs2.provider.ftp.JBFtpKeepAliveCommand$1.invoke(JBFtpKeepAliveCommand.java:10)
    2 frames
  4. JetBrains plugins
    PatchedFtpFileSystem$2.run
    1. com.jetbrains.plugins.webDeployment.connections.PatchedFtpFileSystem$2.run(PatchedFtpFileSystem.java:53)
    1 frame
  5. Openapi
    QueueProcessor.runSafely
    1. com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:238)
    1 frame
  6. IDEA
    Alarm$Request.run
    1. com.intellij.util.Alarm$Request$1.run(Alarm.java:378)
    2. com.intellij.util.Alarm$Request.run(Alarm.java:389)
    2 frames
  7. Java RT
    FutureTask.run
    1. java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
    2. java.util.concurrent.FutureTask.run(FutureTask.java:266)
    2 frames
  8. Openapi
    BoundedTaskExecutor$2.run
    1. com.intellij.util.concurrency.SchedulingWrapper$MyScheduledFutureTask.run(SchedulingWrapper.java:227)
    2. com.intellij.util.concurrency.BoundedTaskExecutor$2.run(BoundedTaskExecutor.java:187)
    2 frames
  9. Java RT
    Thread.run
    1. java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    2. java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    3. java.lang.Thread.run(Thread.java:745)
    3 frames