fix cluster mode with keyless command

client.cpp

@@ -268,16 +268,15 @@ bool client::create_arbitrary_request(unsigned int command_index, struct timeval
 
     benchmark_debug_log("%s: %s:\n", m_connections[conn_id]->get_readable_id(), cmd.command.c_str());
 
-    unsigned long long key_index;
-    get_key_response res = get_key_for_conn(command_index, conn_id, &key_index);
-    /* If key not available for this connection, we have a bug of sending partial request */
-    assert(res == available_for_conn);
-
     for (unsigned int i = 0; i < cmd.command_args.size(); i++) {
         const command_arg* arg = &cmd.command_args[i];
         if (arg->type == const_type) {
             cmd_size += m_connections[conn_id]->send_arbitrary_command(arg);
         } else if (arg->type == key_type) {
+            unsigned long long key_index;
+            get_key_response res = get_key_for_conn(command_index, conn_id, &key_index);
+            /* If key not available for this connection, we have a bug of sending partial request */
+            assert(res == available_for_conn);
             cmd_size += m_connections[conn_id]->send_arbitrary_command(arg, m_key_buffer, m_key_len);
         } else if (arg->type == data_type) {
             unsigned int value_len;

cluster_client.cpp

@@ -355,10 +355,16 @@ get_key_response cluster_client::get_key_for_conn(unsigned int command_index, un
 }
 
 bool cluster_client::create_arbitrary_request(unsigned int command_index, struct timeval& timestamp, unsigned int conn_id) {
-    /* In arbitrary request, where we send the command arg by arg, we need to check if the
-     * generated key belongs to this connection before starting to send it */
+    /* In arbitrary request, where we send the command arg by arg, we need to check for a key command,
+     * if the generated key belongs to this connection before starting to send it */
     assert(m_key_index_pools[conn_id]->empty());
 
+    /* keyless command can be used by any connection */
+    if (get_arbitrary_command(command_index).keys_count == 0) {
+        client::create_arbitrary_request(command_index, timestamp, conn_id);
+        return true;
+    }
+
     unsigned long long key_index;
     get_key_response res = get_key_for_conn(command_index, conn_id, &key_index);