Signing fails when multi-threaded

[scottlarnach]

Hi there, hitting a strange error when trying to run this multi-threaded, while trying to sign a list of 800+ files. The following works

$signFiles = azuresigntool sign -kvu $KeyVaultUri -kvt $TenantId -kvc $cert -kvi $KeyVaultId -kvs $KeyVaultSecret -fd sha384 -tr $site -ifl "filesToSign.txt" -s -mdop "1"

However, if I remove the -mdop "1", it fails after signing a handful of files, with error code 80070020. It's not file specific, different file every time.

[vcsjones]

"80070020" is a sharing violation - two processes are trying to access the file at the same time.

Any chance your list of files contains duplicates, resulting in AST trying to sign the same file at the same time when multithreaded?

[scottlarnach]

Many thanks for the response, part of the process deduplicates the file list so there aren't any duplicates in there - I have just double checked the file being fed in to the sign tool to be sure. I can't figure out how a sharing violation could be happening, it works 100% of the time with a single thread and fails 100% of the time with >1 threads (the more threads, the quicker it fails).

[scottlarnach]

Found the problem, we are using symlinks and they were resulting in the sharing violation, so had to further cleanse the file list. Thanks