Fix: ust: UST communication can return -EAGAIN

[lttng-tools.git] / src / bin / lttng-sessiond / ust-consumer.c

diff --git a/src/bin/lttng-sessiond/ust-consumer.c b/src/bin/lttng-sessiond/ust-consumer.c
index 0fe560661a0b125ceefc3a545d8fc020f1a57854..a68c5d96dc99070304357d3a723b136191868ecc 100644 (file)
--- a/src/bin/lttng-sessiond/ust-consumer.c
+++ b/src/bin/lttng-sessiond/ust-consumer.c
@@ -374,11 +374,16 @@ int ust_consumer_send_stream_to_ust(struct ust_app *app,
        ret = lttng_ust_ctl_send_stream_to_ust(app->sock, channel->obj, stream->obj);
        pthread_mutex_unlock(&app->sock_lock);
        if (ret < 0) {
-               if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
-                       ERR("ustctl send stream handle %d to app pid: %d with ret %d",
-                                       stream->obj->handle, app->pid, ret);
+               if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+                       DBG3("UST app send stream to ust failed. Application is dead. (pid: %d, sock: %d).",
+                                       app->pid, app->sock);
+               } else if (ret == -EAGAIN) {
+                       WARN("UST app send stream to ust failed. Communication time out (pid: %d, sock: %d).",
+                                       app->pid, app->sock);
                } else {
-                       DBG3("UST app send stream to ust failed. Application is dead.");
+                       ERR("UST app send stream, handle %d, to ust failed with ret %d (pid: %d, sock: %d).",
+                                       stream->obj->handle, ret, app->pid,
+                                       app->sock);
                }
                goto error;
        }
@@ -411,11 +416,16 @@ int ust_consumer_send_channel_to_ust(struct ust_app *app,
        ret = lttng_ust_ctl_send_channel_to_ust(app->sock, ua_sess->handle, channel->obj);
        pthread_mutex_unlock(&app->sock_lock);
        if (ret < 0) {
-               if (ret != -EPIPE && ret != -LTTNG_UST_ERR_EXITING) {
-                       ERR("Error ustctl send channel %s to app pid: %d with ret %d",
-                                       channel->name, app->pid, ret);
+               if (ret == -EPIPE || ret == -LTTNG_UST_ERR_EXITING) {
+                       DBG3("UST app send channel to ust failed. Application is dead (pid: %d, sock: %d).",
+                                       app->pid, app->sock);
+               } else if (ret == -EAGAIN) {
+                       WARN("UST app send channel to ust failed. Communication timeout (pid: %d, sock: %d).",
+                                       app->pid, app->sock);
                } else {
-                       DBG3("UST app send channel to ust failed. Application is dead.");
+                       ERR("UST app send channel %s, to ust failed with ret %d (pid: %d, sock: %d).",
+                                       channel->name, ret, app->pid,
+                                       app->sock);
                }
                goto error;
        }