job_submit.lua: handle unexiting account

The job_submit.lua failed with bad log message formatting when the
account does not exist in slurmdbd. Now, this case is gracefully
handled with appropriate error message raised to the user interface.

Fix #6, #14

job_submit/job_submit.lua

@@ -45,6 +45,7 @@ ENFORCE_ACCOUNT = false      -- check qos/account compatibility, default to no
 -- cf. slurm/slurm_errno.h
 ESLURM_INVALID_WCKEY = 2057
 ESLURM_INVALID_QOS = 2066
+ESLURM_INVALID_ACCOUNT = 2045
 WCKEY_CONF_FILE = "/etc/slurm-llnl/wckeysctl/wckeys"
 WCKEY_USER_EXCEPTION_FILE = "/etc/slurm-llnl/wckeysctl/wckeys_user_exception"
 
@@ -417,8 +418,15 @@ function slurm_job_submit ( job_desc, part_list, submit_uid )
       -- value to user's default account for later processing.
       if ENFORCE_ACCOUNT then
           if job_desc.account == nil then
-             slurm.log_info("slurm_job_submit: no account specified by user %s, using default account %s.", username, job_desc.default_account)
-             job_desc.account = job_desc.default_account
+             if job_desc.default_account == nil then
+                slurm.log_info("slurm_job_submit: user %s has no default account, unable to assign default account.",
+                               username)
+                return ESLURM_INVALID_ACCOUNT
+             else
+                slurm.log_info("slurm_job_submit: no account specified by user %s, using default account %s.",
+                               username, job_desc.default_account)
+                job_desc.account = job_desc.default_account
+             end
           else
              slurm.log_info("slurm_job_submit: account %s specified by user %s.", job_desc.account, username)
           end