Arch-Linux

由於 libxml2 未在 python 中導入的問題，Virt-Manager 無法啟動

  • June 2, 2020

大約一年來，我一直在 Arch Linux 上愉快地使用 KVM 和 virt-manger。今天早上，我的一個虛擬機壞了（這是另一個我認為不相關的故事），我決定刪除它並再次進行 virt-install 是最簡單的。

但是，通過 virt-manager 界面刪除此 VM 後，我不再能夠啟動 virt-manager：

$ virt-install
Traceback (most recent call last):
 File "/usr/share/virt-manager/virt-install", line 15, in <module>
   import virtinst
 File "/usr/share/virt-manager/virtinst/__init__.py", line 49, in <module>
   from virtinst.domain import *  # pylint: disable=wildcard-import
 File "/usr/share/virt-manager/virtinst/domain/__init__.py", line 5, in <module>
   from .blkiotune import DomainBlkiotune
 File "/usr/share/virt-manager/virtinst/domain/blkiotune.py", line 8, in <module>
   from ..xmlbuilder import XMLBuilder, XMLChildProperty, XMLProperty
 File "/usr/share/virt-manager/virtinst/xmlbuilder.py", line 16, in <module>
   from .xmlapi import XMLAPI
 File "/usr/share/virt-manager/virtinst/xmlapi.py", line 7, in <module>
   import libxml2
 File "<frozen importlib._bootstrap>", line 991, in _find_and_load
 File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
 File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
 File "<frozen importlib._bootstrap_external>", line 779, in exec_module
 File "<frozen importlib._bootstrap_external>", line 911, in get_code
 File "<frozen importlib._bootstrap_external>", line 580, in _compile_bytecode
EOFError: marshal data too short

似乎 libxml2 在某種程度上被破壞了：

Python 3.8.3 (default, May 17 2020, 18:15:42) 
[GCC 10.1.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import libxml2
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
 File "<frozen importlib._bootstrap>", line 991, in _find_and_load
 File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
 File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
 File "<frozen importlib._bootstrap_external>", line 779, in exec_module
 File "<frozen importlib._bootstrap_external>", line 911, in get_code
 File "<frozen importlib._bootstrap_external>", line 580, in _compile_bytecode
EOFError: marshal data too short

我已經嘗試更新我的系統以及刪除和重新安裝明顯的軟體包 ,libvirt和,virt-manager並沒有幫助，也沒有一些危險的.libxml2``libvirt-python``pacman -Syyu

關於這裡可能被破壞的任何想法？

我正在使用 LTS 核心，5.4。Python 版本是 3.8。虛擬管理器是 2.2.1

另外，如果我只是啟動 python，我可以毫無問題地載入上述錯誤中提到的所有模組。

我即將進行全新的重新安裝，但這是一個可怕的麻煩，如果我可以在 Arch 中修復一些依賴項，我想避免它

編輯：正如評論中所建議的，我嘗試執行 strace ，這是輸出（也許如果我看它足夠長的時間，我會對哪個文件可能已損壞有一些了解）。當我在 root 上用完磁碟空間時，文件損壞似乎確實很可能。

~]$ strace python -c 'import libxml2'
#output was too big to paste in here, so I cut out everything but the last part, which is what seemed most likely to be relevant
###..........many lines deleted....####
###..........many lines deleted....####
###..........many lines deleted....####
getcwd("/home/boss", 1024)              = 11
stat("/home/boss", {st_mode=S_IFDIR|0750, st_size=3488, ...}) = 0
stat("/home/boss", {st_mode=S_IFDIR|0750, st_size=3488, ...}) = 0
stat("/home/boss", {st_mode=S_IFDIR|0750, st_size=3488, ...}) = 0
openat(AT_FDCWD, "/home/boss", O_RDONLY|O_NONBLOCK|O_CLOEXEC|O_DIRECTORY) = 3
fstat(3, {st_mode=S_IFDIR|0750, st_size=3488, ...}) = 0
getdents64(3, /* 41 entries */, 32768)  = 1416
getdents64(3, /* 0 entries */, 32768)   = 0
close(3)                                = 0
stat("/usr/lib/python3.8", {st_mode=S_IFDIR|0755, st_size=8192, ...}) = 0
stat("/usr/lib/python3.8/lib-dynload", {st_mode=S_IFDIR|0755, st_size=8192, ...}) = 0
stat("/home/boss/.local/lib/python3.8/site-packages", {st_mode=S_IFDIR|0700, st_size=3488, ...}) = 0
stat("/usr/lib/python3.8/site-packages", {st_mode=S_IFDIR|0755, st_size=8192, ...}) = 0
stat("/usr/lib/python3.8/site-packages/libxml2.py", {st_mode=S_IFREG|0644, st_size=345896, ...}) = 0
stat("/usr/lib/python3.8/site-packages/libxml2.py", {st_mode=S_IFREG|0644, st_size=345896, ...}) = 0
openat(AT_FDCWD, "/usr/lib/python3.8/site-packages/__pycache__/libxml2.cpython-38.pyc", O_RDONLY|O_CLOEXEC) = 3
fstat(3, {st_mode=S_IFREG|0644, st_size=139264, ...}) = 0
ioctl(3, TCGETS, 0x7fffbe383200)        = -1 ENOTTY (Inappropriate ioctl for device)
lseek(3, 0, SEEK_CUR)                   = 0
lseek(3, 0, SEEK_CUR)                   = 0
fstat(3, {st_mode=S_IFREG|0644, st_size=139264, ...}) = 0
mmap(NULL, 143360, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2172e15000
read(3, "U\r\r\n\0\0\0\0\203\224\246^(G\5\0\343\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 139265) = 139264
read(3, "", 1)                          = 0
close(3)                                = 0
mmap(NULL, 262144, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f2172dd5000
write(2, "Traceback (most recent call last"..., 35Traceback (most recent call last):
) = 35
write(2, "  File \"<string>\", line 1, in <m"..., 39  File "<string>", line 1, in <module>
) = 39
openat(AT_FDCWD, "<string>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "<string>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python38.zip/<string>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/<string>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/lib-dynload/<string>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/home/boss/.local/lib/python3.8/site-packages/<string>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/site-packages/<string>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
write(2, "  File \"<frozen importlib._boots"..., 68  File "<frozen importlib._bootstrap>", line 991, in _find_and_load
) = 68
openat(AT_FDCWD, "<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python38.zip/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/lib-dynload/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/home/boss/.local/lib/python3.8/site-packages/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/site-packages/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
write(2, "  File \"<frozen importlib._boots"..., 77  File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
) = 77
openat(AT_FDCWD, "<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python38.zip/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/lib-dynload/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/home/boss/.local/lib/python3.8/site-packages/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/site-packages/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
write(2, "  File \"<frozen importlib._boots"..., 68  File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
) = 68
openat(AT_FDCWD, "<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python38.zip/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/lib-dynload/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/home/boss/.local/lib/python3.8/site-packages/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/site-packages/<frozen importlib._bootstrap>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
write(2, "  File \"<frozen importlib._boots"..., 74  File "<frozen importlib._bootstrap_external>", line 779, in exec_module
) = 74
openat(AT_FDCWD, "<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python38.zip/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/lib-dynload/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/home/boss/.local/lib/python3.8/site-packages/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/site-packages/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
write(2, "  File \"<frozen importlib._boots"..., 71  File "<frozen importlib._bootstrap_external>", line 911, in get_code
) = 71
openat(AT_FDCWD, "<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python38.zip/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/lib-dynload/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/home/boss/.local/lib/python3.8/site-packages/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/site-packages/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
write(2, "  File \"<frozen importlib._boots"..., 80  File "<frozen importlib._bootstrap_external>", line 580, in _compile_bytecode
) = 80
openat(AT_FDCWD, "<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python38.zip/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/lib-dynload/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/home/boss/.local/lib/python3.8/site-packages/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
openat(AT_FDCWD, "/usr/lib/python3.8/site-packages/<frozen importlib._bootstrap_external>", O_RDONLY|O_CLOEXEC) = -1 ENOENT (No such file or directory)
write(2, "EOFError: marshal data too short"..., 33EOFError: marshal data too short
) = 33
rt_sigaction(SIGINT, {sa_handler=SIG_DFL, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f21734763e0}, {sa_handler=0x7f21736ca3a2, sa_mask=[], sa_flags=SA_RESTORER, sa_restorer=0x7f21734763e0}, 8) = 0
munmap(0x7f2172dd5000, 262144)          = 0
munmap(0x7f2172e15000, 143360)          = 0
sigaltstack(NULL, {ss_sp=0x5610230bc580, ss_flags=0, ss_size=16384}) = 0
sigaltstack({ss_sp=NULL, ss_flags=SS_DISABLE, ss_size=0}, NULL) = 0
exit_group(1)                           = ?
+++ exited with 1 +++

編輯： 這個執行緒似乎很有希望，但我不知道我會在哪裡檢查是否__init__.py失去。

原因很可能是.pyc文件損壞。

嘗試strace在 python 程序中import libxml2查看它在編組錯誤之前打開的文件。

然後，刪除該文件（python 不需要.pyc文件存在才能工作）並import libxml2再次刪除。如果導入成功，請將其刪除python-libxml2並重新安裝（這應該會重新生成錯誤.pyc文件）。

引用自：https://unix.stackexchange.com/questions/590097

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