When the command "guest-fsfreeze-freeze" is executed it causes the VSS service to log the errors below in the Event Viewer.
These errors are caused by two issues in the function "CommitSnapshots" in provider.cpp: 1. When VSS_TIMEOUT_MSEC expires the funtion returns E_ABORT. This causes the error #12293. 2. The VSS_TIMEOUT_MSEC value is too big. According to msdn the "Flush & Hold" operation has 10 seconds timeout not configurable, The "CommitSnapshots" is a part of the "Flush & Hold" process and thus any timeout bigger than 10 seconds would cause the error #12298 and anything bigger than 40 seconds causes the error #12340. All this info can be found here: https://msdn.microsoft.com/en-us/library/windows/desktop/aa384589(v=vs.85).aspx |event id| error | * 12293 : Volume Shadow Copy Service error: Error calling a routine on a Shadow Copy Provider {00000000-0000-0000-0000-000000000000}. Routine details CommitSnapshots [hr = 0x80004004, Operation aborted. * 12340 : Volume Shadow Copy Error: VSS waited more than 40 seconds for all volumes to be flushed. This caused volume \\?\Volume{62a171da-32ec-11e4-80b1-806e6f6e6963}\ to timeout while waiting for the release-writes phase of shadow copy creation. Trying again when disk activity is lower may solve this problem. * 12298 : Volume Shadow Copy Service error: The I/O writes cannot be held during the shadow copy creation period on volume \\?\Volume{62a171d9-32ec-11e4-80b1-806e6f6e6963}\. The volume index in the shadow copy set is 0. Error details: Open[0x00000000, The operation completed successfully. ], Flush[0x00000000, The operation completed successfully.], Release[0x00000000, The operation completed successfully.], OnRun[0x80042314, The shadow copy provider timed out while holding writes to the volume being shadow copied. This is probably due to excessive activity on the volume by an application or a system service. Try again later when activity on the volume is reduced. Signed-off-by: Sameeh Jubran <sam...@daynix.com> --- qga/vss-win32/provider.cpp | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/qga/vss-win32/provider.cpp b/qga/vss-win32/provider.cpp index ef94669..d72f4d4 100644 --- a/qga/vss-win32/provider.cpp +++ b/qga/vss-win32/provider.cpp @@ -15,7 +15,7 @@ #include <inc/win2003/vscoordint.h> #include <inc/win2003/vsprov.h> -#define VSS_TIMEOUT_MSEC (60*1000) +#define VSS_TIMEOUT_MSEC (9 * 1000) static long g_nComObjsInUse; HINSTANCE g_hinstDll; @@ -377,7 +377,6 @@ STDMETHODIMP CQGAVssProvider::CommitSnapshots(VSS_ID SnapshotSetId) if (WaitForSingleObject(hEventThaw, VSS_TIMEOUT_MSEC) != WAIT_OBJECT_0) { /* Send event to qemu-ga to notify the provider is timed out */ SetEvent(hEventTimeout); - hr = E_ABORT; } CloseHandle(hEventThaw); -- 2.9.3
