10.1.3.4 - FTP adapter error while file get

Question

I created an esb service that reads from a remote server and processes the file locally. It works fine in dev. When I migrated my esb flow to a test environment it is now throwing some error.
<AdapterFramework::Inbound> Adapter Framework instance: OraESB - successfully completed endpointActivation for portType=Get_ptt, operation=Get
<FTP Adapter::Inbound> Connection Created
<FTP Adapter::Inbound> Unable to list files from '/apps/EDI/Archive/OutBound/Customer' directory on 'corpapp10' server; FTP command[NLST] returned unexpected reply code : 550
<FTP Adapter::Inbound> Poller raising Alert for exception : ORABPEL-11430
Error in listing files in the remote directory.
Unable to list file in remote directory.
Check the error stack and fix the cause of the error. Contact oracle support if error is not fixable.
The dev remote server and the test remote server are different. I have done the obvious checks about server name, permissions, directory names etc. I can login to the server using windows ftp however when I go the inbound directory and type in ls, i get the following error - 550 Arguments too long. I have some 37000 files in the directory. ls -l works fine.
I switched the ftp adapter to poll a different directory which only has 1 file, but it still gives the same error. However in this case, the windows ftp is able to list the files using ls command.
any idea how i can make this work ?

Answer 1

i undeployed the esb project and deploying it again. Now even worse, nothing happens now. It has stopped polling at all. I just see the following message in the opmn.log, but none of the files get picked up.
<FTP Adapter::Inbound> Connection Created
<FTP Adapter::Inbound> Connection Created
<FTP Adapter::Inbound> Connection Created
To be sure, I deployed it to another environment (DEV) and it works ok there.