FTP Sender channel polled file 2 hrs late

Hi All,

I have seen a strange behaviour of FTP sender communication channel

For last 5 months this interface ( FTP to NFS) is running in production without any issue and poll interval is ( 86400 secs)  and everyday @ exactly 8.00 PM 2 files are picked up.  But today the files are picked up at 10.00 PM.

I have triple checked  there is no change in comm channel or FTP or cache.

We have 3 cluster nodes and all are showing green. In one it shows message picked up @ 10 .00 PM.

What could be the reason? i have seen in some SDN posts , ppl are suggesting it might be due to lock

I am clueless how to debug this mysterious issue

Please help

SAM