在 ubuntu 16.04.6 上尝试屏蔽 systemd 服务。我看到如下错误。
systemctl mask hadoop-hdfs-zkfc.service
Failed to activate service 'org.freedesktop.systemd1': timed out
我正在使用 Ubuntu 16.04.6 自带的默认 systemd 版本。
ubuntu@platform1:~$ systemctl --version
systemd 229
+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP
+LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ -LZ4 +SECCOMP +BLKID +ELFUTILS
+KMOD -IDN
这个问题并不总是会发生。但是一旦出现此问题，恢复 systemd 的唯一方法就是进行硬重启。
查看系统日志发现 systemd 已中止。
May 18 08:49:24 platform3 systemd[1]: Removed slice User Slice of support.
May 18 08:49:27 platform3 systemd[1]: Assertion 's->type ==
SERVICE_ONESHOT' failed at ../src/core/service.c:1792, function
service_enter_start(). Aborting.
May 18 08:49:27 platform3 systemd[1]: Caught <ABRT>, dumped core as pid 15839.
May 18 08:49:27 platform3 systemd[1]: Freezing execution.
busctl输出如下所示
ubuntu@platform3:~/logs$ busctl
NAME PID PROCESS USER CONNECTION UNIT SESSION DESCRIPTION
:1.1 976 systemd-logind root :1.1 systemd-logind.service - -
:1.3 971 accounts-daemon root :1.3 accounts-daemon.service - -
:1.5434 49174 systemctl root :1.5434 cron.service - -
:1.5435 49223 systemctl root :1.5435 ssh.service - -
:1.5436 49408 busctl ubuntu :1.5436 ssh.service - -
:1.7 1109 unattended-upgr root :1.7 unattended-upgrades.se... - -
com.ubuntu.LanguageSelector - - - (activatable) - -
org.debian.AptXapianIndex - - - (activatable) - -
org.freedesktop.Accounts 971 accounts-daemon root :1.3 accounts-daemon.service - -
org.freedesktop.DBus 936 dbus-daemon messagebus org.freedesktop.DBus dbus.service - -
org.freedesktop.hostname1 - - - (activatable) - -
org.freedesktop.locale1 - - - (activatable) - -
org.freedesktop.login1 976 systemd-logind root :1.1 systemd-logind.service - -
org.freedesktop.network1 - - - (activatable) - -
org.freedesktop.resolve1 - - - (activatable) - -
org.freedesktop.systemd1 - - - (activatable) - -
org.freedesktop.thermald - - - (activatable) - -
org.freedesktop.timedate1 - - - (activatable) - -
有人能告诉我如何调试这个吗？
该问题与讨论的问题类似这里。那么这是 Ubuntu 16.04.6 上一些已知的 systemd 问题吗？
答案1
systemd 邮件列表已对此作出答复。交叉发布答案
这个错误（https://github.com/systemd/systemd/issues/4444) 已在 systemd v236 中修复。
看看是否可以使用较新版本的 systemd。