ndb - fixed for BUG#15021, binlog_index table become inconsistent if errors...

ndb - fixed for BUG#15021, binlog_index table become inconsistent if errors during purge of binlogs.
if EMFILE error occured while purging binary logs, stop purging logs and report error message to user.


mysys/my_open.c:
  report EMFILE error when opening file failed.
sql/log.cc:
  report EMFILE error when purging logs, and stop purging logs when EMFILE error occured.
sql/log.h:
  added LOG_INFO_EMFILE error number.
sql/share/errmsg.txt:
  added EMFILE error message for purging binary logs.
sql/sql_repl.cc:
  added EMFILE error message.
sql/table.cc:
  report EMFILE error.

mysys/my_open.c

@@ -167,9 +167,17 @@ File my_register_filename(File fd, const char *FileName, enum file_type
   else
     my_errno=errno;
   DBUG_PRINT("error",("Got error %d on open",my_errno));
-  if (MyFlags & (MY_FFNF | MY_FAE | MY_WME))
+  if (MyFlags & (MY_FFNF | MY_FAE | MY_WME)) {
+    if (my_errno == EMFILE) {
+      DBUG_PRINT("error",("print err: %d",EE_OUT_OF_FILERESOURCES));
+      my_error(EE_OUT_OF_FILERESOURCES, MYF(ME_BELL+ME_WAITTANG),
+	     FileName, my_errno);
+    } else {
+      DBUG_PRINT("error",("print err: %d",error_message_number));
       my_error(error_message_number, MYF(ME_BELL+ME_WAITTANG),
 	     FileName, my_errno);
+    }
+  }
   return(fd);
 }
 

sql/log.cc

@@ -2687,6 +2687,7 @@ int MYSQL_BIN_LOG::purge_logs(const char *to_log,
                           ulonglong *decrease_log_space)
 {
   int error;
+  int ret = 0;
   bool exit_loop= 0;
   LOG_INFO log_info;
   DBUG_ENTER("purge_logs");
@@ -2731,6 +2732,14 @@ int MYSQL_BIN_LOG::purge_logs(const char *to_log,
       *decrease_log_space-= file_size;
 
     ha_binlog_index_purge_file(current_thd, log_info.log_file_name);
+    if (current_thd->query_error) {
+      DBUG_PRINT("info",("query error: %d", current_thd->query_error));
+      if (my_errno == EMFILE) {
+        DBUG_PRINT("info",("my_errno: %d, set ret = LOG_INFO_EMFILE", my_errno));
+        ret = LOG_INFO_EMFILE;
+        break;
+      }
+    }
 
     if (find_next_log(&log_info, 0) || exit_loop)
       break;
@@ -2741,6 +2750,9 @@ int MYSQL_BIN_LOG::purge_logs(const char *to_log,
     the log index file after restart - otherwise, this should be safe
   */
   error= update_log_index(&log_info, need_update_threads);
+  if (error == 0) {
+    error = ret;
+  }
 
 err:
   if (need_mutex)

sql/log.h

@@ -114,6 +114,8 @@ extern TC_LOG_DUMMY tc_log_dummy;
 #define LOG_INFO_MEM -6
 #define LOG_INFO_FATAL -7
 #define LOG_INFO_IN_USE -8
+#define LOG_INFO_EMFILE -9
+
 
 /* bitmap to SQL_LOG::close() */
 #define LOG_CLOSE_INDEX		1

sql/share/errmsg.txt

@@ -6001,4 +6001,5 @@ ER_BAD_LOG_STATEMENT
         ger "Sie knnen eine Logtabelle nicht '%s', wenn Loggen angeschaltet ist"
 ER_NON_INSERTABLE_TABLE  
         eng "The target table %-.100s of the %s is not insertable-into"
-
+ER_BINLOG_PURGE_EMFILE
+        eng "Too many files opened, please execute the command again"

sql/sql_repl.cc

@@ -239,6 +239,7 @@ bool purge_error_message(THD* thd, int res)
   case LOG_INFO_MEM:	errmsg= ER_OUT_OF_RESOURCES; break;
   case LOG_INFO_FATAL:	errmsg= ER_BINLOG_PURGE_FATAL_ERR; break;
   case LOG_INFO_IN_USE: errmsg= ER_LOG_IN_USE; break;
+  case LOG_INFO_EMFILE: errmsg= ER_BINLOG_PURGE_EMFILE; break;
   default:		errmsg= ER_LOG_PURGE_UNKNOWN_ERR; break;
   }
 

sql/table.cc

@@ -1562,6 +1562,17 @@ int open_table_from_share(THD *thd, TABLE_SHARE *share, const char *alias,
 	error= 1;
 	my_errno= ENOENT;
       }
+      else if (ha_err == EMFILE)
+      {
+	/*
+          Too many files opened, use same error message as if the .frm
+           file can't open
+         */
+        DBUG_PRINT("error", ("open file: %s failed, too many files opened (errno: %d)", 
+		share->normalized_path.str, ha_err));
+	error= 1;
+	my_errno= EMFILE;
+      }
       else
       {
         outparam->file->print_error(ha_err, MYF(0));