This problem is caused by the AccessLogWriter has not been flushed at the termination.
The following workaround flushes the Writer.
class FFileSystemDerivedDataBackend : public FDerivedDataBackendInterface { ... FFileSystemDerivedDataBackend(const TCHAR* InCacheDirectory, const TCHAR* InParams, const TCHAR* InAccessLogFileName) : CachePath(InCacheDirectory) , SpeedClass(ESpeedClass::Unknown) , bReadOnly(false) , bTouch(false) , bPurgeTransient(false) , DaysToDeleteUnusedFiles(15) , bDisabled(false) , TotalEstimatedBuildTime(0) { ... if (IsUsable() && InAccessLogFileName != nullptr && *InAccessLogFileName != 0) { AccessLogWriter.Reset(new FAccessLogWriter(InAccessLogFileName)); FCoreDelegates::OnExit.AddRaw(this, &FFileSystemDerivedDataBackend::Shutdown); // workaround } } } //workaround begins void Shutdown() { // UE_LOG(LogTemp, Warning, TEXT("FFileSystemDerivedDataBackend::Shutdown") ); AccessLogWriter.Reset(nullptr); } //workaround ends
[EnumerateForS3DDC] MinimumDaysToKeepFile=7 Root=(Type=KeyLength, Length=120, Inner=AsyncPut) AsyncPut=(Type=AsyncPut, Inner=Hierarchy) Hierarchy=(Type=Hierarchical, Inner=Shared) Shared=(Type=FileSystem, ReadOnly=false, Clean=false, Flush=false, DeleteUnused=true, UnusedFileAge=5, FoldersToClean=10, MaxFileChecksPerSec=1, Path=F:\dev\sharedddc, EnvPathOverride=UE-SharedDataCachePath, WriteAccessLog="%GAMEDIR%Saved/Logs/DDCAccessLog.txt")
This is an example of its output. The halfway line is at the end.
... 5/0/1/ANIMSEQ_D8E26604610C43A4A2DCB8A690657705_0_E86C19E4F5484BB57AF1A871A6D5AB9460E__3F6311423AC1251F647B71CA9A114B69366A4514.udd 3/2/9/ANIMSEQ_D8E26604610C43A4A2DCB8A690657705_0_C14C3B98EEF7A73BA89CA17CE28931A460E__FCBCF82321C6868708B183EE235A8F8EAE1DF811.udd 7/7/9/TEXTURE_2D528FAD496A42E180956107C6FFBD67_BGRA8_9E839E0E4933277AAB67FB869C14F9A__D9794B59901D592EC2E38578B3DB363086D77D5F.udd 2/2/5/TEXTURE_2D528FAD496A42E180956107C6FFBD67_BGRA8_748D4F054C3030AC8888BEA1993C93A__216FF8DE42F5B64CC0A5B848F5C5CCD72236F045.udd 9/6/3/TEXTURE_2D528FAD496A42E180956107C6FFBD67_BGRA8_748D4F054C3030AC8888BEA1993C93A__4AF0321350901D5DA6F672EB1ACD96C859C2CA70.udd 4/1/7/TEXTURE_2D528FAD496A42E180956107C6FFBD67_BGRA8_748D4F054C3030AC8888BEA1993C93A__980C44EFA3E05F3105F9965AB5C833C7A06A268D.udd 8/0/7/TEXTUR
There's no existing public thread on this issue, so head over to Questions & Answers just mention UE-116166 in the post.