src/plugin.c: plugin_dispatch_values: Improve the error messages.

[collectd.git] / src / plugin.c

diff --git a/src/plugin.c b/src/plugin.c
index acf7620..7d2bb57 100644 (file)
--- a/src/plugin.c
+++ b/src/plugin.c
@@ -643,19 +643,32 @@ int plugin_dispatch_values (const char *name, value_list_t *vl)
        data_set_t *ds;
        llentry_t *le;
 
-       if ((list_write == NULL) || (list_data_set == NULL))
+       if (list_write == NULL)
+       {
+               ERROR ("plugin_dispatch_values: No write callback has been "
+                               "registered. Please load at least one plugin "
+                               "that provides a write function.");
+               return (-1);
+       }
+
+       if (list_data_set == NULL)
+       {
+               ERROR ("plugin_dispatch_values: No data sets registered. "
+                               "Could the types database be read? Check "
+                               "your `TypesDB' setting!");
                return (-1);
+       }
 
        le = llist_search (list_data_set, name);
        if (le == NULL)
        {
-               DEBUG ("No such dataset registered: %s", name);
+               INFO ("plugin_dispatch_values: Dataset not found: %s", name);
                return (-1);
        }
 
        ds = (data_set_t *) le->value;
 
-       DEBUG ("plugin: plugin_dispatch_values: time = %u; interval = %i; "
+       DEBUG ("plugin_dispatch_values: time = %u; interval = %i; "
                        "host = %s; "
                        "plugin = %s; plugin_instance = %s; "
                        "type = %s; type_instance = %s;",
@@ -669,7 +682,8 @@ int plugin_dispatch_values (const char *name, value_list_t *vl)
 #else
        if (ds->ds_num != vl->values_len)
        {
-               ERROR ("plugin: ds->type = %s: (ds->ds_num = %i) != "
+               ERROR ("plugin_dispatch_values: ds->type = %s: "
+                               "(ds->ds_num = %i) != "
                                "(vl->values_len = %i)",
                                ds->type, ds->ds_num, vl->values_len);
                return (-1);