Use Zen Server as cooked output store, Occasional crashes during runtime

Development Pipeline & Plugins
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In order to quickly distribute package bodies within our team’s local area network, we have enabled the “Use Zen Server as cooked output store” feature. Most of the time, it runs normally, but occasionally it crashes. According to the crash information, it is due to a failed request to the Zen server. I would like to know if there is currently no retry mechanism in place if the request failure to the Zen server is caused by network issues, or if such issues will be addressed in the future to ensure smooth use of the “Use Zen Server as cooked output store” feature.

Thank you

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[2026.01.21-10.35.49:741][752]LogWindows: Error: Fatal error: [File:D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\StorageServerClient\Private\BuiltInHttpClient\BuiltInHttpClient.cpp] [Line: 111]

[2026.01.21-10.35.49:741][752]LogWindows: Error: Failed sending request to storage server.

[2026.01.21-10.35.49:741][752]LogWindows: Error:

[2026.01.21-10.35.49:741][752]LogWindows: Error:

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff7524b4117 Rhea.exe!FBuiltInHttpClient::RequestSync() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\StorageServerClient\Private\BuiltInHttpClient\BuiltInHttpClient.cpp:114]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff7524aedc6 Rhea.exe!FStorageServerConnection::ReadChunkBatchRequest() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\StorageServerClient\Private\StorageServerConnection.cpp:539]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff7524b077c Rhea.exe!FStorageServerConnection::ReadChunkRequest() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\StorageServerClient\Private\StorageServerConnection.cpp:420]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff7524b6c7a Rhea.exe!FStorageServerFileCache::SendReadMessage() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\StorageServerClient\Private\StorageServerPlatformFile.cpp:731]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff7524add65 Rhea.exe!FStorageServerFileCache::ReadCached() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\StorageServerClient\Private\StorageServerPlatformFile.cpp:667]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff7524ad6ea Rhea.exe!FStorageServerFileHandle::Read() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\StorageServerClient\Private\StorageServerPlatformFile.cpp:822]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff74ae835bd Rhea.exe!FArchiveFileReaderGeneric::ReadLowLevel() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\Core\Private\HAL\FileManagerGeneric.cpp:725]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff74ae88ed4 Rhea.exe!FArchiveFileReaderGeneric::Serialize() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\Core\Private\HAL\FileManagerGeneric.cpp:881]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff74b0af68f Rhea.exe!FFileHelper::LoadFileToArray() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\Core\Private\Misc\FileHelper.cpp:66]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff74bc31ea3 Rhea.exe!FCompositeFontCache::GetFontFace() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\SlateCore\Private\Fonts\FontCacheCompositeFont.cpp:527]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff74bc27be6 Rhea.exe!FCompositeFontCache::DoesFontDataSupportCodepoint() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\SlateCore\Private\Fonts\FontCacheCompositeFont.cpp:727]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff74bc31287 Rhea.exe!FCompositeFontCache::GetFontDataForCodepoint() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\SlateCore\Private\Fonts\FontCacheCompositeFont.cpp:449]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff74bc42301 Rhea.exe!FSlateTextShaper::PerformKerningOnlyTextShaping() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\SlateCore\Private\Fonts\SlateTextShaper.cpp:381]

[2026.01.21-10.35.49:741][752]LogWindows: Error: [Callstack] 0x00007ff74bc432ec Rhea.exe!FSlateTextShaper::PerformTextShaping() [D:\rhea_workspace\ue_rhea_src\Engine\Source\Runtime\SlateCore\Private\Fonts\SlateTextShaper.cpp:285]

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Hi,

We’ve not encountered this type of issue before and don’t have plans to address it. Our expectation is that the connection between the workstation and the device running the game code is high speed and high reliability and that requests should not fail. Generally we have a direct connection between the workstation and the game device. In your situation, what is the physical path between the workstation (where zenserver is running) and the game device (that is trying to request data from zenserver)?

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