VMware guest server got hung

Issue

• The VMware guest was hung, and many processes running on the server were found in UN (uninterruptible) state:

[  0 01:07:26.780] UN+[UN]  PID: 26667  TASK: ffff81052177c100  CPU: 2   COMMAND: "sh"
[  0 09:57:33.523] UN+[UN]  PID: 10641  TASK: ffff8110072e1080  CPU: 3   COMMAND: "java"
[  1 02:14:54.864] UN+[UN]  PID: 7936   TASK: ffff811022b27100  CPU: 3   COMMAND: "java"
[...]
[  1 04:17:25.839] UN+[UN]  PID: 4907   TASK: ffff81103b1590c0  CPU: 3   COMMAND: "kjournald"
[  1 04:17:26.544] UN+[UN]  PID: 2609   TASK: ffff81103b51f820  CPU: 2   COMMAND: "kjournald"
[  1 04:17:26.782] UN+[UN]  PID: 2615   TASK: ffff81103fad10c0  CPU: 2   COMMAND: "kjournald"
[...]