SAP Knowledge Base Article - Preview

2236156 - Socket write error or FTP 421 in PI File Adapter


  • In Process Integration (PI), the File Sender channel keeps failing with errors such as:

FTP response 421 received. Server closed connection

  • The traces contain the following error:

[EXCEPTION] Connection reset by peer: socket write error
 at Method)

  • You were able to rule out any network related issues



  • PI Release Independent
  • SAP NetWeaver
  • SAP Process Integration


SAP NetWeaver 7.4 ; SAP NetWeaver all versions ; SAP Process Integration all versions


XI, 7.01, 7.02, 7.10, 7.11, 7.30, 7.31, 7.4, 7.5, Process Orchestration, FTPS , KBA , BC-XI-CON-FIL , File Adapter , Problem

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