diff --git a/HISTORY.rst b/HISTORY.rst
index a53590555..bc183170d 100644
--- a/HISTORY.rst
+++ b/HISTORY.rst
@@ -21,15 +21,19 @@
 
 **Bug fixes**
 
-- 2395_, [OpenBSD]: `pid_exists()`_ erroneously return True if the argument is
-  a thread ID (TID) instead of a PID (process ID).
-- 2254_, [Linux]: offline cpus raise NotImplementedError in cpu_freq() (patch by Shade Gladden)
+- 2250_, [NetBSD]: `Process.cmdline()`_ sometimes fail with EBUSY. It usually
+  happens for long cmdlines with lots of arguments. In this case retry getting
+  the cmdline for up to 50 times, and return an empty list as last resort.
+- 2254_, [Linux]: offline cpus raise NotImplementedError in cpu_freq() (patch
+  by Shade Gladden)
 - 2272_: Add pickle support to psutil Exceptions.
 - 2359_, [Windows], [CRITICAL]: `pid_exists()`_ disagrees with `Process`_ on
   whether a pid exists when ERROR_ACCESS_DENIED.
 - 2360_, [macOS]: can't compile on macOS < 10.13.  (patch by Ryan Schmidt)
 - 2362_, [macOS]: can't compile on macOS 10.11.  (patch by Ryan Schmidt)
 - 2365_, [macOS]: can't compile on macOS < 10.9.  (patch by Ryan Schmidt)
+- 2395_, [OpenBSD]: `pid_exists()`_ erroneously return True if the argument is
+  a thread ID (TID) instead of a PID (process ID).
 
 **Porting notes**
 
diff --git a/psutil/arch/netbsd/proc.c b/psutil/arch/netbsd/proc.c
index c645f301e..4cd43c4c7 100644
--- a/psutil/arch/netbsd/proc.c
+++ b/psutil/arch/netbsd/proc.c
@@ -332,6 +332,8 @@ psutil_proc_cmdline(PyObject *self, PyObject *args) {
     pid_t pid;
     int mib[4];
     int st;
+    int attempt;
+    int max_attempts = 50;
     size_t len = 0;
     size_t pos = 0;
     char *procargs = NULL;
@@ -359,10 +361,32 @@ psutil_proc_cmdline(PyObject *self, PyObject *args) {
         PyErr_NoMemory();
         goto error;
     }
-    st = sysctl(mib, __arraycount(mib), procargs, &len, NULL, 0);
-    if (st == -1) {
-        PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_PROC_ARGV)");
-        goto error;
+
+    while (1) {
+        st = sysctl(mib, __arraycount(mib), procargs, &len, NULL, 0);
+        if (st == -1) {
+            if (errno == EBUSY) {
+                // Usually happens with TestProcess.test_long_cmdline. See:
+                // https://github.com/giampaolo/psutil/issues/2250
+                attempt += 1;
+                if (attempt < max_attempts) {
+                    psutil_debug("proc %zu cmdline(): retry on EBUSY", pid);
+                    continue;
+                }
+                else {
+                    psutil_debug(
+                        "proc %zu cmdline(): return [] due to EBUSY", pid
+                    );
+                    free(procargs);
+                    return py_retlist;
+                }
+            }
+            else {
+                PyErr_SetFromOSErrnoWithSyscall("sysctl(KERN_PROC_ARGV)");
+                goto error;
+            }
+        }
+        break;
     }
 
     if (len > 0) {