KB1857: Unable to allocate processing ... - Veeam Software
https://www.veeam.com/kb185713.02.2014 · For more information, see Transport Modes. Investigate backup job performance. If specific jobs are taking longer to process than normal, check for warnings, compare the bottleneck statistics to previous jobs sessions, and try to isolate the problem to a specific proxy, repository, host, or datastore. Present newly added LUNs to the Veeam Server