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PI FTP error 426 during Windows IIS connection

Hi,

We are experiencing an issue between SAP PI 7.0 SP15 on P-Series AIX IBM Server and the Windows IIS FTP server. The interface in PI does connect to 3 systems with the FTP file adapter (a Mainframe, an AS400 and a Windows IIS FTP server). The mainframe and the AS400 connection are working fine but for the IIS we are getting a FTP failure in 90% of the transfers in 10% it works. With other clients (also one based on JFTP) everything works fine with the IIS server. The files are only 2kb and not to large as described in the File Adapter FAQ note.

There where tests with active (FTP failure 500) and passive connections, the timeout value was increased on both sides. The connection bandwidth reached never more than 40% and there were always enough CPU processes available on both sides.

Following technical details for the passive connection failure:

XI we do get following error log in MDT

2008-09-09 20:27:01 Success Connecting to FTP server "bla.com"

2008-09-09 20:27:02 Success Write to FTP server "bla.com", directory "/sapedi/Outbound/856otest", -> file "SAPASN253201157.txt"

2008-09-09 20:27:02 Success Transfer: "TXT" mode, size 2131 bytes, character encoding ISO8859-1

2008-09-09 20:27:02 Error Attempt to process file failed with com.sap.aii.adapter.file.ftp.FTPEx: 426 Connection closed; transfer aborted.

2008-09-09 20:27:02 Error MP: Exception caught with cause com.sap.aii.af.ra.ms.api.RecoverableException: Connection closed; transfer aborted.: com.sap.aii.adapter.file.ftp.FTPEx: 426 Connection closed; transfer aborted.

2008-09-09 20:27:02 Error Exception caught by adapter framework: Connection closed; transfer aborted.

The log of XI from /usr/sap/PXQ/DVEBMGS00/j2ee/cluster/server0/log/applications/com.sap.xi/xi.2.log

0#Error#1#com.sap.aii.adapter.file.util.AuditLog#Plain###FILE_ERR_211#

xi.2.log:#1.#3A2BF0015004006F0000098D00096046000456F11A40B559#1221493434398#/Applications/ExchangeInfrastructure/AdapterFramework/Services/ADAPTER/ADMIN/File#sap.com/com.sap.aii.af.app#com.sap.aii.adapter.file.XI2File.processMessage(Message)#J2EE_GUEST#0#SAP J2EE Engine JTA Transaction : 03affffff863a005363#n/a##de1f90f0833c11dda1993a2bf0015004#XI XI2FileCC_FILE_CPS_PRC316_IN/LEG_CPSQ_BS/_104767##0#0#Error#1#com.sap.aii.adapter.file.XI2File#Plain###File processing failed with com.sap.aii.adapter.file.ftp.FTPEx: 426 Connection closed; transfer aborted.#

xi.2.log:#1.#3A2BF0015004006F0000098F00096046000456F11A40B6AB#1221493434398#/Applications/ExchangeInfrastructure/AdapterFramework/Services/ADAPTER/ADMIN/File#sap.com/com.sap.aii.af.app#com.sap.aii.adapter.file.util.AuditLog.addAuditLog(PublicMessageKey, String, AuditLogStatus, String, String, Object[])#J2EE_GUEST#0#SAP J2EE Engine JTA Transaction : 03affffff863a005363#n/a##de1f90f0833c11dda1993a2bf0015004#XI XI2FileCC_FILE_CPS_PRC316_IN/LEG_CPSQ_BS/_104767##0#0#Error#1#com.sap.aii.adapter.file.util.AuditLog#Plain###FILE_ERR_211#

xi.2.log:#1.#3A2BF0015004006B000009CB00096046000456F11ABB9521#1221493442450#/Applications/ExchangeInfrastructure/AdapterFramework/Services/ADAPTER/ADMIN/File#sap.com/com.sap.aii.af.app#com.sap.aii.adapter.file.XI2File.processMessage(Message)#J2EE_GUEST#0#SAP J2EE Engine JTA Transaction : 03affffff863a005364#n/a##1e2afb80833d11ddc03c3a2bf0015004#XI XI2FileCC_FILE_CPS_PRC316_IN/LEG_CPSQ_BS/_104771##0#0#Error#1#com.sap.aii.adapter.file.XI2File#Plain###File processing failed with com.sap.aii.adapter.file.ftp.FTPEx: 426 Connection closed; transfer aborted.#

xi.2.log:#1.#3A2BF0015004006B000009CD00096046000456F11ABB966E#1221493442451#/Applications/ExchangeInfrastructure/AdapterFramework/Services/ADAPTER/ADMIN/File#sap.com/com.sap.aii.af.app#com.sap.aii.adapter.file.util.AuditLog.addAuditLog(PublicMessageKey, String, AuditLogStatus, String, String, Object[])#J2EE_GUEST#0#SAP J2EE Engine JTA Transaction : 03affffff863a005364#n/a##1e2afb80833d11ddc03c3a2bf0015004#XI XI2FileCC_FILE_CPS_PRC316_IN/LEG_CPSQ_BS/_104771##0#0#Error#1#com.sap.aii.adapter.file.util.AuditLog#Plain###FILE_ERR_211#

On the IIS server side we have the following log for the failure:

2008-09-10 08:32:50 x.x.x.20 SAPEDI MSFTPSVC1 BLA x.x.x.x 21 68977USER SAPEDI - 331 0 0 0 0 FTP - - - -

2008-09-10 08:32:50 x.x.x.20 SAPEDI MSFTPSVC1 BLA x.x.x.x 21 68977PASS - - 230 0 0 0 0 FTP - - - -

2008-09-10 08:32:50 x.x.x.20 SAPEDI MSFTPSVC1 BLA x.x.x.x 21 68977CWD /sapedi/Outbound/856otest - 250 0 0 0 0 FTP - - - -

2008-09-10 08:32:50 x.x.x.20 SAPEDI MSFTPSVC1 BLA x.x.x.x 21 68977created SAPASN253201157.txt - 426 995 0 0 16 FTP - - - -

2008-09-10 08:32:50 x.x.x.20 SAPEDI MSFTPSVC1 BLA x.x.X.X 21 68977QUIT - - 426 0 0 0 0 FTP - - - -

Thank you for your help.

Former Member
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