Unexpected exception during gather of site, HTTP response: 500 Internal Error

Hi,

after I imported gathered airgap response file, gatherdb.log is showing below error.
the rest of others site don’t have this error.

Sat, 14 Jul 2018 00:10:32 +0800 – Gather mirror finished for siteEnterprise Security
Sat, 14 Jul 2018 00:10:32 +0800 – Gathering the currentFileList file…
Sat, 14 Jul 2018 00:10:32 +0800 – Unexpected exception during gather of site Enterprise Security: Unexpected HTTP response: 500 Internal Error

Sat, 14 Jul 2018 00:10:55 +0800 – Gather mirror finished for sitePatches for RHEL6 Native Tools
Sat, 14 Jul 2018 00:10:55 +0800 – Gathering the currentFileList file…
Sat, 14 Jul 2018 00:10:55 +0800 – Unexpected exception during gather of site Patches for RHEL6 Native Tools: Unexpected HTTP response: 500 Internal Error

Also, i ran the diagnostic tool against this 2 sites.
Request Type: Site Contents

File Error “Class FileItemError” on “D:\Program Files (x86)\BigFix Enterprise\BES Server\wwwrootbes\bfmirror\bfsites\enterprisemirror_9_3006__sdirlist”

i checked folder it is actually empty, the rest of folders in same location got couple of files inside.
think its somehow link.
pls advise, thanks!

for the benefit of others, had fixed it by doing “Gather State Reset” per advise by IBM Support. Cheers!
ref: https://www-01.ibm.com/support/docview.wss?uid=swg21697473