added severity levels for afterErrorReply

Former-commit-id: fe0f07199353abf6668cd66cd2e21751db5c21d9

src/networking.cpp

@@ -494,7 +494,7 @@ void addReplyErrorLength(client *c, const char *s, size_t len) {
 }
 
 /* Do some actions after an error reply was sent (Log if needed, updates stats, etc.) */
-void afterErrorReply(client *c, const char *s, size_t len) {
+void afterErrorReply(client *c, const char *s, size_t len, int severity = ERR_CRITICAL) {
     /* Sometimes it could be normal that a replica replies to a master with
      * an error and this function gets called. Actually the error will never
      * be sent because addReply*() against master clients has no effect...
@@ -522,9 +522,30 @@ void afterErrorReply(client *c, const char *s, size_t len) {
 
         if (len > 4096) len = 4096;
         const char *cmdname = c->lastcmd ? c->lastcmd->name : "<unknown>";
-        serverLog(LL_WARNING,"== CRITICAL == This %s is sending an error "
-                             "to its %s: '%.*s' after processing the command "
-                             "'%s'", from, to, (int)len, s, cmdname);
+        switch (severity) {
+            case ERR_NOTICE:
+                serverLog(LL_NOTICE,"== NOTICE == This %s is rejecting a command "
+                    "from its %s: '%.*s' after processing the command "
+                    "'%s'", from, to, (int)len, s, cmdname);
+            break;
+            case ERR_WARNING:
+                serverLog(LL_WARNING,"== WARNING == This %s is rejecting a command "
+                    "from its %s: '%.*s' after processing the command "
+                    "'%s'", from, to, (int)len, s, cmdname);
+            break;
+            case ERR_ERROR:
+                serverLog(LL_WARNING,"== ERROR == This %s is sending an error "
+                    "to its %s: '%.*s' after processing the command "
+                    "'%s'", from, to, (int)len, s, cmdname);
+            break;
+            case ERR_CRITICAL:
+            default:
+                serverLog(LL_WARNING,"== CRITICAL == This %s is sending an error "
+                    "to its %s: '%.*s' after processing the command "
+                    "'%s'", from, to, (int)len, s, cmdname);
+            break;
+        }
+
         if (ctype == CLIENT_TYPE_MASTER && g_pserver->repl_backlog &&
             g_pserver->repl_backlog_histlen > 0)
         {
@@ -536,9 +557,9 @@ void afterErrorReply(client *c, const char *s, size_t len) {
 
 /* The 'err' object is expected to start with -ERRORCODE and end with \r\n.
  * Unlike addReplyErrorSds and others alike which rely on addReplyErrorLength. */
-void addReplyErrorObject(client *c, robj *err) {
+void addReplyErrorObject(client *c, robj *err, int severity) {
     addReply(c, err);
-    afterErrorReply(c, szFromObj(err), sdslen(szFromObj(err))-2); /* Ignore trailing \r\n */
+    afterErrorReply(c, szFromObj(err), sdslen(szFromObj(err))-2, severity); /* Ignore trailing \r\n */
 }
 
 void addReplyError(client *c, const char *err) {

src/server.cpp

@@ -3773,13 +3773,14 @@ void call(client *c, int flags) {
  * If there's a transaction is flags it as dirty, and if the command is EXEC,
  * it aborts the transaction.
  * Note: 'reply' is expected to end with \r\n */
-void rejectCommand(client *c, robj *reply) {
+void rejectCommand(client *c, robj *reply, int severity = ERR_CRITICAL) {
     flagTransaction(c);
     if (c->cmd && c->cmd->proc == execCommand) {
         execCommandAbort(c, szFromObj(reply));
-    } else {
+    }
+    else {
         /* using addReplyError* rather than addReply so that the error can be logged. */
-        addReplyErrorObject(c, reply);
+        addReplyErrorObject(c, reply, severity);
     }
 }
 
@@ -4024,7 +4025,7 @@ int processCommand(client *c, int callFlags) {
         /* Active Replicas can execute read only commands, and optionally write commands */
         if (!(g_pserver->loading == LOADING_REPLICATION && g_pserver->fActiveReplica && ((c->cmd->flags & CMD_READONLY) || g_pserver->fWriteDuringActiveLoad)))
         {
-            rejectCommand(c, shared.loadingerr);
+            rejectCommand(c, shared.loadingerr, ERR_WARNING);
             return C_OK;
         }
     }

src/server.h

@@ -543,6 +543,12 @@ extern int configOOMScoreAdjValuesDefaults[CONFIG_OOM_COUNT];
 #define LL_WARNING 3
 #define LL_RAW (1<<10) /* Modifier to log without timestamp */
 
+/* Error severity levels */
+#define ERR_CRITICAL 0
+#define ERR_ERROR 1
+#define ERR_WARNING 2
+#define ERR_NOTICE 3
+
 /* Supervision options */
 #define SUPERVISED_NONE 0
 #define SUPERVISED_AUTODETECT 1
@@ -2056,7 +2062,7 @@ void addReplyBulkLongLong(client *c, long long ll);
 void addReply(client *c, robj_roptr obj);
 void addReplySds(client *c, sds s);
 void addReplyBulkSds(client *c, sds s);
-void addReplyErrorObject(client *c, robj *err);
+void addReplyErrorObject(client *c, robj *err, int severity);
 void addReplyErrorSds(client *c, sds err);
 void addReplyError(client *c, const char *err);
 void addReplyStatus(client *c, const char *status);