--- old/src/share/vm/logging/logFileOutput.cpp	2016-04-20 18:12:13.045169924 +0900
+++ new/src/share/vm/logging/logFileOutput.cpp	2016-04-20 18:12:12.895198987 +0900
@@ -26,6 +26,7 @@
 #include "logging/logConfiguration.hpp"
 #include "logging/logFileOutput.hpp"
 #include "memory/allocation.inline.hpp"
+#include "runtime/arguments.hpp"
 #include "runtime/os.inline.hpp"
 #include "utilities/globalDefinitions.hpp"
 #include "utilities/defaultStream.hpp"
@@ -187,14 +188,15 @@
       }
       _file_count = static_cast<uint>(value);
     } else if (strcmp(FileSizeOptionKey, key) == 0) {
-      size_t value = parse_value(value_str);
-      if (value == SIZE_MAX || value > SIZE_MAX / K) {
+      success = Arguments::atojulong(value_str, &_rotate_size);
+      if (!success) {
+        break;
+      } else if (_rotate_size > SIZE_MAX) {
         errstream->print_cr("Invalid option: %s must be in range [0, "
-                            SIZE_FORMAT "]", FileSizeOptionKey, SIZE_MAX / K);
+                            SIZE_FORMAT "]", FileSizeOptionKey, SIZE_MAX);
         success = false;
         break;
       }
-      _rotate_size = value * K;
     } else {
       errstream->print_cr("Invalid option '%s' for log file output.", key);
       success = false;