filter_chain: Use a complaint to report plugin_write()'s ENOENT error.

In most cases this is a permanent error, so using the complain mechanism
avoids spamming the logs.

diff --git a/src/filter_chain.c b/src/filter_chain.c
index 4b164dc3a1a0e0cdd56c0007ee591a70900e466b..ed2df61c9c5b16f35a0e6953ab0f9ca5da03fc8b 100644 (file)
--- a/src/filter_chain.c
+++ b/src/filter_chain.c
@@ -22,6 +22,7 @@
 #include "collectd.h"
 #include "configfile.h"
 #include "plugin.h"
+#include "utils_complain.h"
 #include "common.h"
 #include "filter_chain.h"
 
@@ -692,10 +693,15 @@ static int fc_bit_write_invoke (const data_set_t *ds, /* {{{ */
 
   if ((plugin_list == NULL) || (plugin_list[0] == NULL))
   {
+    static c_complain_t enoent_complaint = C_COMPLAIN_INIT_STATIC;
+
     status = plugin_write (/* plugin = */ NULL, ds, vl);
     if (status == ENOENT)
     {
-      INFO ("Filter subsystem: Built-in target `write': Dispatching value to "
+      /* in most cases this is a permanent error, so use the complain
+       * mechanism rather than spamming the logs */
+      c_complain (LOG_INFO, &enoent_complaint,
+          "Filter subsystem: Built-in target `write': Dispatching value to "
           "all write plugins failed with status %i (ENOENT). "
           "Most likely this means you didn't load any write plugins.",
           status);
@@ -705,6 +711,13 @@ static int fc_bit_write_invoke (const data_set_t *ds, /* {{{ */
       INFO ("Filter subsystem: Built-in target `write': Dispatching value to "
           "all write plugins failed with status %i.", status);
     }
+    else
+    {
+      assert (status == 0);
+      c_release (LOG_INFO, &enoent_complaint, "Filter subsystem: "
+          "Built-in target `write': Some write plugin is back to normal "
+          "operation. `write' succeeded.");
+    }
   }
   else
   {