bitbake: toaster: properly detect failed server start

This patch brings in reading the server log if the server
fails to start. This is the first step in displaying the errors
in a manner that is actionable by the user.

[YOCTO #7285]

(Bitbake rev: 7f47b67bccff55673a827dbcccc767af4459c933)

Signed-off-by: Alexandru DAMIAN <alexandru.damian@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

bitbake/lib/toaster/bldcontrol/management/commands/runbuilds.py

@@ -78,10 +78,16 @@ class Command(NoArgsCommand):
         except Exception as e:
             logger.error("runbuilds: Error executing shell command %s" % e)
             traceback.print_exc(e)
+            if "[Errno 111] Connection refused" in str(e):
+                # Connection refused, read toaster_server.out
+                errmsg = bec.readServerLogFile()
+            else:
+                errmsg = str(e)
+
             BRError.objects.create(req = br,
-                errtype = str(type(e)),
-                errmsg = str(e),
-                traceback = traceback.format_exc(e))
+                    errtype = str(type(e)),
+                    errmsg = errmsg,
+                    traceback = traceback.format_exc(e))
             br.state = BuildRequest.REQ_FAILED
             br.save()
             bec.be.lock = BuildEnvironment.LOCK_FREE