Test4z "mkdirp: unable to create sftp client ..." to z/OS

Products

• Test4z
• Brightside

Issue/Introduction

Encountering this error trying to transfer to the z/OS Mainframe

"mkdirp: unable to create sftp client: ssh subsystem request failed" 

Resolution

Mainframe syslog showed RACF access problem for the sftp/ssh attempt:
**********
BPXF024I (OMVSKERN) Mar 19 00:40:17 SYBRCD1 sshd 67175390 : Accepted   
285                                                                    
password for U123456 from ##.##.#.# port 58735 ssh2                
IAT6100 ( DEMSEL ) JOB BPXAS    (JOB30829), PRTY=15, ID=OMVSKERN       
OPS4200I MESSAGE: 'OPSWTO MSGID(CICSMONY) TEXT('CICSMONY SNF1310-013-I 
 069 RECEIVED A SWITCH LOGON REQUEST                                   
IEF403I BPXAS - STARTED - TIME=11.40.17                                 
BPXP024I BPXAS INITIATOR STARTED ON BEHALF OF JOB SSHD2 RUNNING IN     
ASID 0176                                                              
IAT6100 ( DEMSEL ) JOB BPXAS    (JOB30830), PRTY=15, ID=OMVSKERN       
IEF403I BPXAS - STARTED - TIME=11.40.17                                
BPXP024I BPXAS INITIATOR STARTED ON BEHALF OF JOB U442038 RUNNING IN   
ASID 02A5  
ICH408I USER(U123456 ) GROUP(GROUP123) NAME(A.B) 293  
  /tmp/.sh_history CL(FSOBJ   ) FID(00000000000000000000021600000000)  
  INSUFFICIENT AUTHORITY TO OPEN                                        
  ACCESS INTENT(RW-)  ACCESS ALLOWED(OTHER      ---)                   
  EFFECTIVE UID(0000123456)  EFFECTIVE GID(0012345678)               
...
**********

The user needed to request read access to the SSH port 22 for the LPAR. After that was granted the problem was resolved.