Add a sensible error message.

neunhoef · neunhoef · commit 6fa99b6b60c8 · 2016-09-20T15:26:51.000+02:00
diff --git a/arangod/Cluster/AgencyCallback.cpp b/arangod/Cluster/AgencyCallback.cpp
@@ -65,6 +65,8 @@ void AgencyCallback::refetchAndUpdate(bool needToAcquireMutex) {
   AgencyCommResult result = _agency.getValues(key);
 
   if (!result.successful()) {
+    LOG(ERR) << "Callback getValues to agency was not successful: "
+             << result.errorCode() << " " << result.errorMessage();
     return;
   }
   

Original file line number	Diff line number	Diff line change
`@@ -65,6 +65,8 @@ void AgencyCallback::refetchAndUpdate(bool needToAcquireMutex) {`
`65`	`65`	`AgencyCommResult result = _agency.getValues(key);`
`66`	`66`
`67`	`67`	`if (!result.successful()) {`
	`68`	`+ LOG(ERR) << "Callback getValues to agency was not successful: "`
	`69`	`+ << result.errorCode() << " " << result.errorMessage();`
`68`	`70`	`return;`
`69`	`71`	`}`
`70`	`72`