[LU-17451] `lctl dl` with Netlink/YAML fails with large numer of devices

• Type: Bug
• Resolution: Unresolved
• Priority: Minor
• Severity: 3
• Assignee: James A Simmons
• Reporter: Tim Day

Description

See the following error:

[centos][127][~/Programming/lustre-release]$ sudo ./lustre/utils/lctl dl
  0 UP osd-zfs lustre-MDT0000-osd lustre-MDT0000-osd_UUID 10
  1 UP mgs MGS MGS 5
  2 UP mgc MGC172.31.20.187@tcp 9de548fc-f02c-405d-99b8-56dc3e23d83a 5
  3 UP mds MDS MDS_uuid 3
...
158 UP obd_test obd_name_136 obd_uuid_136 3
159 UP obd_test obd_name_137 obd_uuid_137 3
160 UP obd_test obd_name_138 obd_uuid_138 3
161 UP obd_test obd_name_139 obd_uuid_139 3
162 UP obd_test obd_name_140 obd_uuid_140 3
163 UP obd_test obd_name_141 obd_uuid_141 3
Scanner error: while scanning a simple key at line 990, column 3
could not find expected ':' at line 991, column 1
free(): invalid next size (normal)
Aborted 

It appears like whatever Netlink is returning isn't being correctly interpreted as a YAML. This only happens when using a large number of devices.

Issue Links

• is related to: LU-9680 Improve the user land to kernel space interface for lustre