1. Make a NTFS junction from one drive to another using mklink /J C:\...\folder1 D:\...\folder2 (I'm using this to store my desktop folder on another partition)
2. Start the launcher, and set your .minecraft folder to folder1 (or a subdirectory of it). The launcher hangs as soon as you save the profile
3. Launcher hangs with 12.5% (100% usage on one core) CPU usage and 2 MB/s disk usage
Stack trace of the hung thread:
0, ntdll.dll!NtQueryAttributesFile+0xa
1, wow64.dll+0x9f76
2, wow64.dll!Wow64SystemServiceEx+0xfb
3, wow64cpu.dll!TurboDispatchJumpAddressEnd+0xb
4, wow64.dll!Wow64LdrpInitialize+0x23a
5, wow64.dll!Wow64LdrpInitialize+0x172
6, ntdll.dll!LdrInitShimEngineDynamic+0x23d5
7, ntdll.dll!memset+0xde1e
8, ntdll.dll!LdrInitializeThunk+0xe
9, ntdll.dll!ZwQueryAttributesFile+0xc (No unwind info)
10, launcher.dll!SetBootstrapVersionInfo+0x3253c (No unwind info)
11, launcher.dll+0x11504 (No unwind info)
12, launcher.dll!SetBootstrapVersionInfo+0x32d84 (No unwind info)
13, launcher.dll+0x44b39 (No unwind info)
14, launcher.dll+0x39d2a (No unwind info)
15, launcher.dll!SetBootstrapVersionInfo+0x18ec2 (No unwind info)
16, libcef.dll!cef_browser_view_get_for_browser+0x1b19 (No unwind info)
17, libcef.dll!cef_string_multimap_key+0xaea6 (No unwind info)
18, libcef.dll!IsSandboxedProcess+0x5dd58e (No unwind info)
19, libcef.dll!IsSandboxedProcess+0x375f04 (No unwind info)
20, libcef.dll!IsSandboxedProcess+0x375f51 (No unwind info)
21, libcef.dll!cef_string_multimap_key+0x4a4a (No unwind info)
22, libcef.dll!cef_string_multimap_key+0xad34 (No unwind info)
23, libcef.dll!cef_zip_reader_create+0x2fbfbc (No unwind info)
24, libcef.dll!cef_zip_reader_create+0x2fc9d6 (No unwind info)
25, libcef.dll!cef_zip_reader_create+0x27f631 (No unwind info)
26, libcef.dll!cef_zip_reader_create+0x284734 (No unwind info)
27, libcef.dll!cef_zip_reader_create+0x27a27b (No unwind info)
28, libcef.dll!cef_time_to_timet+0x251f16 (No unwind info)
29, libcef.dll!RelaunchChromeBrowserWithNewCommandLineIfNeeded+0x377e45 (No unwind info)
30, libcef.dll!GetHandleVerifier+0x3f2c9 (No unwind info)
31, libcef.dll+0x6ad137 (No unwind info)
32, libcef.dll+0x6ade4e (No unwind info)
33, libcef.dll!GetHandleVerifier+0x3f9cf (No unwind info)
34, libcef.dll!GetHandleVerifier+0x3f5f5 (No unwind info)
35, libcef.dll!GetHandleVerifier+0x12e19 (No unwind info)
36, libcef.dll+0x6ac601 (No unwind info)
37, libcef.dll!cef_string_list_value+0x6fdb (No unwind info)
38, launcher.dll!RunLauncher+0xacc (No unwind info)
39, MinecraftLauncher.exe+0x14635 (No unwind info)
40, MinecraftLauncher.exe+0x145a3 (No unwind info)
41, MinecraftLauncher.exe+0x14428 (No unwind info)
42, MinecraftLauncher.exe+0x8981 (No unwind info)
43, MinecraftLauncher.exe+0x50d08 (No unwind info)
44, MinecraftLauncher.exe+0x5851a (No unwind info)
45, MinecraftLauncher.exe+0x5143c (No unwind info)
46, MinecraftLauncher.exe+0x32400 (No unwind info)
47, kernel32.dll!BaseThreadInitThunk+0x24 (No unwind info)
48, ntdll.dll!RtlInitializeExceptionChain+0x8f (No unwind info)
49, ntdll.dll!RtlInitializeExceptionChain+0x5a (No unwind info)Linked issues
duplicates 1
Comments 4
Please read this comment for developer information on how to change working directories with the new launcher.
I think this was accidentally set as a duplicate of MC-5294 rather than MCL-5294. In any case, I don't want to change the working directory of the launcher.
I had recently moved my whole Desktop to a different partition and made a hard link from the old Desktop to the new partition to avoid breaking things. This resulted in minecraft freezing with high CPU usage. MCL-5294 seems to be about Minecraft ignoring the APPDATA variable, which was marked as "Works as Intended". This bug is about minecraft freezing when the game (not .minecraft) directory is a cross-partition NTFS junction.
The native launcher doesn't work well with junctions, see MCL-5294 (via MCL-8824); IIRC this is a boost issue but it's not my area of expertise. But this does seem very odd, and I feel like that should only matter for things that the launcher manages, not the game directory (which the launcher shouldn't need to mess with)...