[ADSM-L] Reg: datamover sessions hung for tsm/ve backups

Hi Team,

I am facing tsm/ve backups hung over some couple of weeks which is requiring manual intervention to reboot the datamover server then only I am able to get the backup sessions running fine.

share your experience and fixes if any you come across for this issue

tsm/ve version 7140
platform windows 2012
tsm server version 7.1.4.100

I do not find any errors in error log for the hungs when we had traces enabled so disabled them then the error log saying as below

dsmerror.VE_POK11DM3.log
========================
03/26/2016 22:29:37 ANS1717E A VMware vStorage web service task failed.
03/26/2016 23:07:17 ANS0361I DIAG: The VDDK Utility Thread may be hung processing another request.
03/26/2016 23:07:17 ANS0361I DIAG: Waiting up to another 3600000 milliseconds to process a request to VddkFullVMCloseVMDKs for vm 'pokcsmeta01'.
03/26/2016 23:07:24 ANS0361I DIAG: The VDDK Utility Thread may be hung processing another request.
03/26/2016 23:07:24 ANS0361I DIAG: Waiting up to another 3600000 milliseconds to process a request to VddkFullVMOpenCloseSingleVMDK for vm 'POKCBSAPAP62'.
03/26/2016 23:27:58 ANS0361I DIAG: The VDDK Utility Thread may be hung processing another request.
03/26/2016 23:27:58 ANS0361I DIAG: Waiting up to another 3600000 milliseconds to process a request to VddkFullVMCloseVMDKs for vm 'pokcsmetvm01'.
03/26/2016 23:28:20 ANS0361I DIAG: The VDDK Utility Thread may be hung processing another request.
03/26/2016 23:28:20 ANS0361I DIAG: Waiting up to another 3600000 milliseconds to process a request to VddkFullVMOpenCloseSingleVMDK for vm 'pokcdmetvm01'.
03/26/2016 23:28:25 ANS0361I DIAG: The VDDK Utility Thread may be hung processing another request.
03/26/2016 23:28:25 ANS0361I DIAG: Waiting up to another 3600000 milliseconds to process a request to VddkFullVMOpenCloseSingleVMDK for vm 'POKCDSAPAP31'.
03/26/2016 23:29:37 ANS0361I DIAG: The VDDK Utility Thread may be hung processing another request.
03/26/2016 23:29:37 ANS0361I DIAG: Waiting up to another 3600000 milliseconds to process a request to VddkFullVMCloseVMDKs for vm 'pokctcvs01'.
03/27/2016 00:07:17 ANS0361I DIAG: The VDDK Utility Thread may be hung processing another request.

Thanks & Regards,

Srikanth kola
Backup & Recovery
IBMIndiaPvt Ltd, Bangalore
Mobile: +91 9885473450