diff --git a/src/controller/job.c b/src/controller/job.c
index 8c31fa2a..ae378d5e 100644
--- a/src/controller/job.c
+++ b/src/controller/job.c
@@ -837,8 +837,16 @@ static int dispatch_a_job_(cluster_t* c, endpoint_t* ep, xce_job_alloc_t* alloc)
     int                nc;
     xce_job_exec_t     einfo;
     xce_launch_t       launchinfo;
+    char               jobidStr[64];
 
-    TRACE("%s jobid %ld", __func__, alloc->jobid);
+    /* bug-1588: fmt_jobid() renders the raw idgen()-packed jobid in the
+     * same human-readable "cluster-apiserver-timestamp-sequence" form
+     * already used everywhere else this codebase logs/displays a jobid
+     * (scheduler.c/handler.c/worker's process_manager.c, xcecli's job
+     * listing, waldump) -- job.c's own TRACE lines were the one place
+     * still printing the raw 64-bit packed integer. */
+    fmt_jobid(jobidStr, sizeof(jobidStr), alloc->jobid);
+    TRACE("%s jobid %s", __func__, jobidStr);
 
     lock(c->jobmgr, RTTI_LOCK_READ);
     rc = key_find(c->jobmgr, (void*)alloc->jobid, (void**)&j);
@@ -1658,8 +1666,11 @@ int on_job_start(cluster_t* c, job_pidinfo_t* info)
 {
     job_t* job = NULL;
     int    rc;
+    char   jobidStr[64];
 
-    TRACE("%s jobid %ld", __func__, info->jobid);
+    /* bug-1588: see dispatch_a_job_()'s own comment on fmt_jobid(). */
+    fmt_jobid(jobidStr, sizeof(jobidStr), info->jobid);
+    TRACE("%s jobid %s", __func__, jobidStr);
 
     lock(c->jobmgr, RTTI_LOCK_READ);
     rc = key_find(c->jobmgr, (void*)info->jobid, (void**)&job);
@@ -1762,8 +1773,11 @@ static int record_job_finish_fact(cluster_t* c, job_t* job,
 int on_job_finish(cluster_t* c, xce_jobfinish_t* finish)
 {
     job_t* job = NULL;
+    char   jobidStr[64];
 
-    TRACE("%s job finish jobid %ld exit code %d", __func__, finish->jobid,
+    /* bug-1588: see dispatch_a_job_()'s own comment on fmt_jobid(). */
+    fmt_jobid(jobidStr, sizeof(jobidStr), finish->jobid);
+    TRACE("%s job finish jobid %s exit code %d", __func__, jobidStr,
           finish->exit_code);
 
     lock(c->jobmgr, RTTI_LOCK_READ);
@@ -2022,8 +2036,11 @@ static int record_job_postdone_fact(cluster_t* c, job_t* job)
 int on_job_fail(cluster_t* c, job_failinfo_t* failinfo)
 {
     job_t* job = NULL;
+    char   jobidStr[64];
 
-    TRACE("%s job fail jobid %ld code %d", __func__, failinfo->jobid,
+    /* bug-1588: see dispatch_a_job_()'s own comment on fmt_jobid(). */
+    fmt_jobid(jobidStr, sizeof(jobidStr), failinfo->jobid);
+    TRACE("%s job fail jobid %s code %d", __func__, jobidStr,
           failinfo->code);
 
     lock(c->jobmgr, RTTI_LOCK_READ);
@@ -2051,8 +2068,11 @@ int on_job_stop(cluster_t* c, uint64_t jobid)
 {
     job_t* job = NULL;
     int    state;
+    char   jobidStr[64];
 
-    TRACE("%s job stop jobid %ld", __func__, jobid);
+    /* bug-1588: see dispatch_a_job_()'s own comment on fmt_jobid(). */
+    fmt_jobid(jobidStr, sizeof(jobidStr), jobid);
+    TRACE("%s job stop jobid %s", __func__, jobidStr);
 
     lock(c->jobmgr, RTTI_LOCK_READ);
     key_find(c->jobmgr, (void*)jobid, (void**)&job);
@@ -2086,8 +2106,11 @@ int on_job_resume(cluster_t* c, uint64_t jobid)
 {
     job_t* job = NULL;
     int    state;
+    char   jobidStr[64];
 
-    TRACE("%s job resume jobid %ld", __func__, jobid);
+    /* bug-1588: see dispatch_a_job_()'s own comment on fmt_jobid(). */
+    fmt_jobid(jobidStr, sizeof(jobidStr), jobid);
+    TRACE("%s job resume jobid %s", __func__, jobidStr);
 
     lock(c->jobmgr, RTTI_LOCK_READ);
     key_find(c->jobmgr, (void*)jobid, (void**)&job);
@@ -2119,8 +2142,11 @@ int on_job_resume(cluster_t* c, uint64_t jobid)
 int on_job_postdone(cluster_t* c, endpoint_t* ep, uint64_t jobid)
 {
     job_t* job = NULL;
+    char   jobidStr[64];
 
-    TRACE("%s job post done jobid %ld", __func__, jobid);
+    /* bug-1588: see dispatch_a_job_()'s own comment on fmt_jobid(). */
+    fmt_jobid(jobidStr, sizeof(jobidStr), jobid);
+    TRACE("%s job post done jobid %s", __func__, jobidStr);
 
     lock(c->jobmgr, RTTI_LOCK_READ);
     key_find(c->jobmgr, (void*)jobid, (void**)&job);
@@ -2293,8 +2319,11 @@ static int set_preason(cluster_t* c, xce_pendreason_t* reasons)
 {
     job_t*     j   = NULL;
     xce_job_t* job = NULL;
+    char       jobidStr[64];
 
-    TRACE("%s jobid %ld", __func__, reasons->jobid);
+    /* bug-1588: see dispatch_a_job_()'s own comment on fmt_jobid(). */
+    fmt_jobid(jobidStr, sizeof(jobidStr), reasons->jobid);
+    TRACE("%s jobid %s", __func__, jobidStr);
 
     lock(c->jobmgr, RTTI_LOCK_READ);
     key_find(c->jobmgr, (void*)reasons->jobid, (void**)&j);