this has cropped up into Disco now.appears to be affecting all of the tested instances. 

09/19 04:58:46 DEBUG|     utils:0153| [stdout] startup='Thu Sep 19 04:57:06 2019'
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/sys/fs/binfmt_misc/register: is write-only.
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/sys/net/ipv6/conf/all/stable_secret: known issue: errno=EIO(5): Input/output error
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/sys/net/ipv6/conf/default/stable_secret: known issue: errno=EIO(5): Input/output error
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/sys/net/ipv6/conf/eth0/stable_secret: known issue: errno=EIO(5): Input/output error
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/sys/net/ipv6/conf/lo/stable_secret: known issue: errno=EIO(5): Input/output error
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/kmsg: known issue: errno=EAGAIN/EWOULDBLOCK(11): Resource temporarily unavailable
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/sysrq-trigger: is write-only.
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/task/57214/mem: known issue: errno=EIO(5): Input/output error
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/task/57214/clear_refs: is write-only.
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/task/57214/pagemap: reached maxmbytes (-m)
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/task/57214/attr/prev: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/task/57214/attr/exec: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/task/57214/attr/fscreate: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/task/57214/attr/keycreate: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/task/57214/attr/sockcreate: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      1  TFAIL  :  proc01.c:397: read failed: /proc/self/task/57214/attr/smack/current: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      2  TFAIL  :  proc01.c:397: read failed: /proc/self/task/57214/attr/apparmor/prev: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      3  TFAIL  :  proc01.c:397: read failed: /proc/self/task/57214/attr/apparmor/exec: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/mem: known issue: errno=EIO(5): Input/output error
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/clear_refs: is write-only.
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/pagemap: reached maxmbytes (-m)
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/attr/prev: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/attr/exec: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/attr/fscreate: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/attr/keycreate: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      0  TINFO  :  /proc/self/attr/sockcreate: known issue: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      4  TFAIL  :  proc01.c:397: read failed: /proc/self/attr/smack/current: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      5  TFAIL  :  proc01.c:397: read failed: /proc/self/attr/apparmor/prev: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      6  TFAIL  :  proc01.c:397: read failed: /proc/self/attr/apparmor/exec: errno=EINVAL(22): Invalid argument
09/19 04:58:46 DEBUG|     utils:0153| [stdout] proc01      7  TFAIL  :  proc01.c:466: readproc() failed with 6 errors.
09/19 04:58:46 DEBUG|     utils:0153| [stdout] tag=proc01 stime=1568869026 dur=1 exit=exited stat=1 core=no cu=16 cs=107