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| Custom Java code for sftp |
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| sravan |
 Posted: Tue Feb 01, 2011 8:26 pm Post subject: Custom Java code for sftp |
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Centurion
Joined: 02 Apr 2010
Posts: 104
Location: Charlotte
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We use custom Java code from Java compute node to transfer files(SFTP) from UNIX to Windows server.
(Since we had earlier version of WMB which did not support file node with sftp at that time).
We use a sftp ssh client vendor for sftp key management/set up.
When the volume is huge ,we are seeing hung therads for the ssh cleint
which is causing a password prompt for the sftp ssh client.
Did anyone experienced this scenario in your applications.
At this moment we are unable to decide who is creating the hung threads(
ssh client or the java code from ajav compute node).
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skr_wmb |
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| fjb_saper |
| Posted: Tue Feb 01, 2011 8:41 pm Post subject: |
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Grand High Poobah
Joined: 18 Nov 2003
Posts: 20756
Location: LI,NY
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Remember that ftp and even sftp is not highly reliable and that transfers can be aborted, due to various environmental conditions, before their completion. You might want to be looking into using a product like MQFTE, Connect Direct, etc... (their protocol guarantees the arrival of the full file before triggering stuff) for your file transfers.
Have fun 
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| mqjeff |
| Posted: Wed Feb 02, 2011 5:37 am Post subject: |
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Grand Master
Joined: 25 Jun 2008
Posts: 17447
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You should at least migrate to a version of Broker that has the FileInput node and supports sftp.
Then you will be able to point fingers in the right places via a PMR if you still see hung threads.
As FJ says, the care and feeding of an ftp transfer, whether over SSh or not, is a complicated process, and is a much much harder problem than it seems at first. So it's usually much less expensive to use an off-the-shelf solution to handle file transfers to external partners than to write your own, over the lifetime of the solution. |
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| sravan |
| Posted: Wed Feb 02, 2011 11:16 am Post subject: |
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Centurion
Joined: 02 Apr 2010
Posts: 104
Location: Charlotte
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Thanks for you'r responses.
If we use higher version of file node which has the sftp capability,there is chance that it might be resolved,The only concern is because of the intermittent nature of this hung threads it is difficult to replicate in the test environment to prove this.
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| lancelotlinc |
| Posted: Wed Feb 02, 2011 11:47 am Post subject: |
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Jedi Knight
Joined: 22 Mar 2010
Posts: 4941
Location: Bloomington, IL USA
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| sravan wrote: |
Thanks for you'r responses.
If we use higher version of file node which has the sftp capability,there is chance that it might be resolved,The only concern is because of the intermittent nature of this hung threads it is difficult to replicate in the test environment to prove this. |
Sounds like a great business case for a Performance Test Environment which is capable to simulate true business transactions for long periods, like several days straight. Else, how would you promote this code to Prod without knowing if it worked first?
You should be capable of replicating any business transaction in test. You should be capable of replicating any combinations of business transactions in test. This may imply the need to build downstream simulators.
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