[Bug 1815599] [NEW] multipath shows '#:#:#:#' for iscsi device after error injection

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Problem Description:
After error injection(reset one node for storage), 1 of 4 luns show '####' for half paths

---uname output---
root at ilzlnx4:~# uname -a
Linux ilzlnx4 4.15.0-43-generic #46-Ubuntu SMP Thu Dec 6 14:43:05 UTC 2018 s390x s390x s390x GNU/Linux

Machine Type = s390x


--iscsi initiator
root at ilzlnx4:~# dpkg  -l  | grep iscsi
ii  open-iscsi                            2.0.874-5ubuntu2.6                s390x        iSCSI initiator tools

 
---Debugger---
A debugger is not configured
 
---Steps to Reproduce---
1 Mapping 4 luns via open-iscsi from SVC
2 Running IO on these luns
3 Run storage side error inject 'node reset' for SVC (about start at ?2019/02/11 05:14?)
4 half of one luns' path show '#:#:#:#' and never recovered without manual intervention


[2019/02/11 05:53:13]  INFO send: multipath -ll | cat  
[2019/02/11 05:53:29]  INFO  
3600507638085814a980000000000000a dm-3 IBM,2145 
size=10G features='3 queue_if_no_path queue_mode mq' hwhandler='0' wp=rw 
|-+- policy='service-time 0' prio=50 status=active 
| |- 4:0:0:3 sdr 65:16 active ready running 
| `- 6:0:0:3 sdu 65:64 active ready running 
`-+- policy='service-time 0' prio=10 status=enabled 
  |- 1:0:0:3 sdh 8:112 active ready running 
  `- 2:0:0:3 sdl 8:176 active ready running 
3600507638085814a9800000000000009 dm-4 IBM,2145 
size=10G features='3 queue_if_no_path queue_mode mq' hwhandler='0' wp=rw 
|-+- policy='service-time 0' prio=50 status=active 
| |- 1:0:0:1 sdf 8:80  active ready running 
| `- 2:0:0:1 sdj 8:144 active ready running 
`-+- policy='service-time 0' prio=0 status=enabled 
  |- #:#:#:# sdo 8:224 active faulty running 
  `- #:#:#:# sds 65:32 active faulty running 
3600507638085814a9800000000000008 dm-2 IBM,2145 
size=10G features='3 queue_if_no_path queue_mode mq' hwhandler='0' wp=rw 
|-+- policy='service-time 0' prio=50 status=active 
| |- 4:0:0:2 sdq 65:0  active ready running 
| `- 6:0:0:2 sdt 65:48 active ready running 
`-+- policy='service-time 0' prio=10 status=enabled 
  |- 2:0:0:2 sdk 8:160 active ready running 
  `- 1:0:0:2 sdg 8:96  active ready running 
3600507638085814a9800000000000006 dm-5 IBM,2145 
size=10G features='3 queue_if_no_path queue_mode mq' hwhandler='0' wp=rw 
|-+- policy='service-time 0' prio=50 status=active 
| |- 4:0:0:0 sdm 8:192 active ready running 
| `- 6:0:0:0 sdp 8:240 active ready running 
`-+- policy='service-time 0' prio=10 status=enabled 
  |- 1:0:0:0 sde 8:64  active ready running 
  `- 2:0:0:0 sdi 8:128 active ready running

** Affects: multipath-tools (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: architecture-s39064 bot-comment bugnameltc-175431 severity-medium targetmilestone-inin18041
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multipath shows '#:#:#:#' for iscsi device after error injection
https://bugs.launchpad.net/bugs/1815599
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