Attempt ping from front- to back-end several times (#1990).

[dcpomatic.git] / src / tools / dcpomatic_disk.cc

diff --git a/src/tools/dcpomatic_disk.cc b/src/tools/dcpomatic_disk.cc
index 0a53a0a9bd02f8ec390267cec1f8c98930ec4958..3daffb72d0b94d7d8b0c1b340f4d1359bcaa2c3f 100644 (file)
--- a/src/tools/dcpomatic_disk.cc
+++ b/src/tools/dcpomatic_disk.cc
@@ -249,18 +249,27 @@ private:
                DCPOMATIC_ASSERT (_drive->GetSelection() != wxNOT_FOUND);
                DCPOMATIC_ASSERT (static_cast<bool>(_dcp_path));
 
-               bool have_writer = true;
-               if (!_nanomsg.send(DISK_WRITER_PING "\n", 2000)) {
-                       LOG_DISK_NC("Could not send ping to writer");
-                       have_writer = false;
-               } else {
-                       auto reply = _nanomsg.receive (2000);
-                       if (!reply) {
-                               LOG_DISK_NC("No reply received from ping");
-                               have_writer = false;
-                       } else if (*reply != DISK_WRITER_PONG) {
-                               LOG_DISK_NC("Unexpected response to ping received");
-                               have_writer = false;
+               auto ping = [this](int attempt) {
+                       if (_nanomsg.send(DISK_WRITER_PING "\n", 2000)) {
+                               auto reply = _nanomsg.receive (2000);
+                               if (reply && *reply == DISK_WRITER_PONG) {
+                                       return true;
+                               } else if (reply) {
+                                       LOG_DISK("Unexpected response %1 to ping received (attempt %2)", *reply, attempt);
+                               } else {
+                                       LOG_DISK("No reply received from ping (attempt %1)", attempt);
+                               }
+                       } else {
+                               LOG_DISK("Could not send ping to writer (attempt %1)", attempt);
+                       }
+                       return false;
+               };
+
+               bool have_writer = false;
+               for (int i = 0; i < 8; ++i) {
+                       if (ping(i + 1)) {
+                               have_writer = true;
+                               break;
                        }
                }