Merge branch 'collectd-5.5' into collectd-5.6

[collectd.git] / src / daemon / plugin.c

diff --git a/src/daemon/plugin.c b/src/daemon/plugin.c
index 2ccc68c..c6efc3f 100644 (file)
--- a/src/daemon/plugin.c
+++ b/src/daemon/plugin.c
@@ -1974,10 +1974,10 @@ int plugin_shutdown_all (void)
        llentry_t *le;
        int ret = 0;  // Assume success.
 
-       stop_read_threads ();
-
        destroy_all_callbacks (&list_init);
 
+       stop_read_threads ();
+
        pthread_mutex_lock (&read_lock);
        llist_destroy (read_list);
        read_list = NULL;
@@ -1985,6 +1985,10 @@ int plugin_shutdown_all (void)
 
        destroy_read_heap ();
 
+       /* blocks until all write threads have shut down. */
+       stop_write_threads ();
+
+       /* ask all plugins to write out the state they kept. */
        plugin_flush (/* plugin = */ NULL,
                        /* timeout = */ 0,
                        /* identifier = */ NULL);
@@ -2015,8 +2019,6 @@ int plugin_shutdown_all (void)
                plugin_set_ctx (old_ctx);
        }
 
-       stop_write_threads ();
-
        /* Write plugins which use the `user_data' pointer usually need the
         * same data available to the flush callback. If this is the case, set
         * the free_function to NULL when registering the flush callback and to
@@ -2399,7 +2401,7 @@ int plugin_dispatch_multivalue (value_list_t const *template, /* {{{ */
                case DS_TYPE_GAUGE:
                        vl->values[0].gauge = va_arg (ap, gauge_t);
                        if (store_percentage)
-                               vl->values[0].gauge *= sum ? (100.0 / sum) : 0;
+                               vl->values[0].gauge *= sum ? (100.0 / sum) : NAN;
                        break;
                case DS_TYPE_ABSOLUTE:
                        vl->values[0].absolute = va_arg (ap, absolute_t);