Concurrent Request With SFTP Delivery Option Fails With Negotiated Kex is null failed to negotiate key exchange algorithm

(Doc ID 2327924.1)

Last updated on NOVEMBER 21, 2017

Applies to:

BI Publisher (formerly XML Publisher) - Version 12.1.3 and later
Information in this document applies to any platform.

Symptoms

On : 12.1.3 version, E-Business Suite Specific, TEST instance.

Delivery option for concurrent request || SFTP

Customer is trying to run request and upload output using delivery Options(FTP (Secure)). They are able to access SFTP Server and able to upload file from backend.
But while using Delivery opts we are getting below Error in OPP Log file:
 
[9/25/17 3:24:33 PM] [UNEXPECTED] [38294:RT1060662] oracle.apps.xdo.delivery.ssh2.SshException: Exception in reading buffered data The socket is EOF at oracle.apps.xdo.delivery.ssh2.transport.MessageProcessor.readEncryptedMessage(MessageProcessor.java:1930)
  at oracle.apps.xdo.delivery.ssh2.transport.MessageProcessor.sendEncryptedMessage(MessageProcessor.java:2955)
  at oracle.apps.xdo.delivery.ssh2.transport.TransportProtocolClient.requestService(TransportProtocolClient.java:326)
  at oracle.apps.xdo.delivery.ssh2.transport.TransportProtocolClient.startTransportProtocol(TransportProtocolClient.java:495)
  at oracle.apps.xdo.delivery.ssh2.SFTPDeliveryRequestHandler.submitRequest(SFTPDeliveryRequestHandler.java:90)
  at oracle.apps.xdo.delivery.AbstractDeliveryRequest.submit(AbstractDeliveryRequest.java:1270)
  at oracle.apps.fnd.cp.opp.FtpDeliveryProcessor.sftp(FtpDeliveryProcessor.java:150)
  at oracle.apps.fnd.cp.opp.FtpDeliveryProcessor.deliver(FtpDeliveryProcessor.java:63)
  at oracle.apps.fnd.cp.opp.DeliveryProcessor.process(DeliveryProcessor.java:91)
  at oracle.apps.fnd.cp.opp.OPPRequestThread.run(OPPRequestThread.java:176)

The issue can be reproduced at will with the following steps:

1. Login to EBS application
2. Submit any program from submit request window
3. While submitting the program, go to delivery options and give the ftp details.
4. Error is displayed in the fndopp log

Due to this issue, users cannot do sftp to destination server using delivery option.

Cause

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