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Former Member

Intermittent connection issue with FTP servers

Hi All

Though it is a known issue we could not able to resolve from Dec 21st 2016.

Error occurred while connecting to the FTP server "X.X.X.X:21": java.net.ConnectException: Connection timed out.

This issue is there in all our DEV/TEST/PROD systems. Totally with 5 servers we are having intermittent connection issue.

This is not holding any messages.They are processing successfully when connection is successful.

But still we want to know the root cause.

We receive 4 to 5 alerts for every hour due to channel failures in PROD.

Workaround done so far:


FTP Vendor confirmed that there is no issue with Severs at their end and there is no Firewall blockage/Port change/No permission issue/No login issues

Basis Team confirmed no changes or patch applied on Dec 20 or 21.

Network team confirmed that no issues found at Network level

Timeout parameter is set already in all our FTP channels in Feb 2016.

No changes made to PI channels and objects are transported.

Raised OSS Incident to SAP andXPI-Inspector logs,Thread dumps provided are

for further analysis.


I would like to check with you people if we missed out any thing to find the cause.

Your help is very much appreciated!!



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3 Answers

  • Feb 09, 2017 at 07:15 AM

    I dont think anything else is missed out.

    your getting any particular log in XPI?.

    this is should be mostly due to network issues.

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  • Feb 09, 2017 at 10:36 AM

    To make the data processing smooth you can set up - Receiver Queue Parallelism, Max Concurrency, pool waiting time, time out value etc.

    But before that make sure you FTP connection - port, firewall rule, FTP directory owner all are alligned properly.



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    Former Member
    Feb 09, 2017 at 12:57 PM

    Hi Apu

    From FTP end everything is fine.Vendor confirmed.If there is any Note or more information on Receiver Queue Parallelism, Max Concurrency(any value), pool waiting time(maximum value) please let me know.



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