Hi all. I have had my Unraid server running for years and mostly problem-free.

Recently, I think after an os update, my Unraid server's Sleep function stops working after 24 hours.

Here is the error from the log

Aug 20 10:49:23 Vault kernel: Freezing user space processes failed after 20.006 seconds (1 tasks refusing to freeze, wq_busy=0):

Aug 20 10:49:23 Vault kernel: task:chmod state:D stack:0 pid:53124 tgid:53124 ppid:40406 flags:0x00004006

Aug 20 10:49:23 Vault kernel: Call Trace:

Aug 20 10:49:23 Vault kernel: <TASK>

Aug 20 10:49:23 Vault kernel: __schedule+0x707/0x760

Aug 20 10:49:23 Vault kernel: schedule+0x2e/0x50

Aug 20 10:49:23 Vault kernel: request_wait_answer+0xff/0x1e0

Aug 20 10:49:23 Vault kernel: ? __pfx_autoremove_wake_function+0x10/0x10

Aug 20 10:49:23 Vault kernel: __fuse_simple_request+0x1a6/0x1f0

Aug 20 10:49:23 Vault kernel: fuse_readdir_uncached+0x15b/0x670

Aug 20 10:49:23 Vault kernel: iterate_dir+0x6d/0x120

Aug 20 10:49:23 Vault kernel: __do_sys_getdents64+0x6b/0xe0

Aug 20 10:49:23 Vault kernel: ? __pfx_filldir64+0x10/0x10

Aug 20 10:49:23 Vault kernel: do_syscall_64+0x68/0xe0

Aug 20 10:49:23 Vault kernel: entry_SYSCALL_64_after_hwframe+0x76/0x7e

Aug 20 10:49:23 Vault kernel: RIP: 0033:0x1542364e6647

Aug 20 10:49:23 Vault kernel: RSP: 002b:00007fff34d16d18 EFLAGS: 00000293 ORIG_RAX: 00000000000000d9

Aug 20 10:49:23 Vault kernel: RAX: ffffffffffffffda RBX: 000055b019969c20 RCX: 00001542364e6647

Aug 20 10:49:23 Vault kernel: RDX: 0000000000008000 RSI: 000055b019969c20 RDI: 0000000000000003

Aug 20 10:49:23 Vault kernel: RBP: 000055b019969bf4 R08: 0000000000000000 R09: 000055b019e72690

Aug 20 10:49:23 Vault kernel: R10: 000055b01b7f74c0 R11: 0000000000000293 R12: ffffffffffffff80

Aug 20 10:49:23 Vault kernel: R13: 0000000000000000 R14: 000055b019969bf0 R15: 00000000000010e3

Aug 20 10:49:23 Vault kernel: </TASK>

Aug 20 10:49:23 Vault kernel: OOM killer enabled.

Aug 20 10:49:23 Vault kernel: Restarting tasks ... done.

Aug 20 10:49:23 Vault kernel: random: crng reseeded on system resumption

Aug 20 10:49:23 Vault kernel: PM: suspend exit

Aug 20 10:49:23 Vault s3_sleep: Wake-up from sleep mode

I assume the problem is in the first line in bold, but I'm not sure how to fix it.

Does anyone have any idea?

thanks

it looks like the system ran out of memory to store sleep data.

unriad Full OS exist in ram. sleep also needs quite a bit of ram resource to put the machine in a sleep state.

you hit OOM:

Aug 20 10:49:23 Vault kernel: OOM killer enabled.

if you have a btrfs partition, I recmoned installing the swap plugin to help deter and potential fix this by making a swap partition.