vxconfigd crashed & dumped core with SIGSEGV in ddl_delete_node() after addition of new LUNs.

Problem

vxconfigd crashed & dumped core with SIGSEGV in ddl_delete_node() after addition of new LUNs.

Error Message

STACK:

 001935e8 ddl_delete_node () + c
 00191a78 ddl_migration_devlist_found () + 120
 0019158c ddl_check_migration_of_devices () + b8
 00191114 ddl_reconfigure_all () + 390
 0016d8c8 ddl_find_devices_in_system () + 43c
 0010b14c find_devices_in_system () + 38
 0010a5bc mode_set () + 1a8
 000ffebc setup_mode () + 24
 000ffe0c startup  () + 2d4
 000ff604 main     () + fa8
 00041ca8 _start   () + 108

Error messages:

Feb 10 10:49:00 uss-105 vxvm:vxconfigd: [ID 702911 daemon.notice] V-5-1-14523 LUN serial number of the OS device 
path with device number 118/3952 has changed from 2AC0007C2081 (c3t21220002AC002081d22) to 
2AC0007D2081 (c3t21220002AC002081d22)
Feb 10 10:49:01 uss-105 vxvm:vxconfigd: [ID 702911 daemon.notice] V-5-1-16011 
Data Corruption Protection Activated - User Corrective Action Needed:
Feb 10 10:49:01 uss-105 vxvm:vxconfigd: [ID 702911 daemon.notice] To recover, 
first ensure that the OS device tree is up to date (requires OS specific commands).
Feb 10 10:49:01 uss-105 vxvm:vxconfigd: [ID 702911 daemon.notice] Then, execute 'vxdisk rm' on the following devices 
before reinitiating device discovery using 'vxdisk scandisks'
Feb 10 10:49:01 uss-105 vxvm:vxconfigd: [ID 702911 daemon.notice] V-5-1-0 3pardata0_124
Feb 10 10:49:01 uss-105 vxvm:vxconfigd: [ID 702911 daemon.error] V-5-1-13790 No 
device configuration changes have been applied to DMP kernel database.

Cause

Proper procedure for dynamically removing and adding LUNs is not followed.

vxconfigd in VxVM 5.1SP1 incorrectly claims newly added LUNs under a single DMP node. Thus vxconfigd corrupts DMP database in memory.

Solution

Its solution is in Storage Foundation (SF) 5.1SP1RP2P2HF5. Please upgrade Storage Foundation 5.1SP1 to Storage Foundation 5.1SP1RP2, then please apply  SF 5.1SP1RP2P2, and then the hotfix VxVM  5.1SP1RP2P2HF5.

 

To avoid this issue, please follow the proper procedure to dynamically remove or add LUNs.  Please refer to 000040904.

TECHALERT 000001792
Newly added disks in VxVM 5.1 SP1 are incorrectly being claimed under single dmpnode which may cause data corruption.

 

 

 

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