Fixes problem with getting not LSN address gotten from

horizon addres.


storage/maria/ma_loghandler.c:
  New function to get correct LSN from chunk address.
storage/maria/ma_loghandler.h:
  New function to get correct LSN from chunk address.

storage/maria/ma_loghandler.c

@@ -6594,6 +6594,49 @@ static uint32 translog_first_file(TRANSLOG_ADDRESS horizon, int is_protected)
 }
 
 
+/**
+  @brief returns the most close LSN higher the given chunk address
+
+  @param addr the chunk address to start from
+  @param horizon the horizon if it is known or LSN_IMPOSSIBLE
+
+  @retval LSN_ERROR Error
+  @retval LSN_IMPOSSIBLE no LSNs after the address
+  @retval # LSN of the most close LSN higher the given chunk address
+*/
+
+LSN translog_next_LSN(TRANSLOG_ADDRESS addr, TRANSLOG_ADDRESS horizon)
+{
+  uint chunk_type;
+  TRANSLOG_SCANNER_DATA scanner;
+  DBUG_ENTER("translog_next_LSN");
+
+  if (horizon == LSN_IMPOSSIBLE)
+    horizon= translog_get_horizon();
+
+  if (addr == horizon)
+    DBUG_RETURN(LSN_IMPOSSIBLE);
+
+  translog_init_scanner(addr, 0, &scanner);
+
+  chunk_type= scanner.page[scanner.page_offset] & TRANSLOG_CHUNK_TYPE;
+  DBUG_PRINT("info", ("type: %x  byte: %x", (uint) chunk_type,
+                      (uint) scanner.page[scanner.page_offset]));
+  while (chunk_type != TRANSLOG_CHUNK_LSN &&
+         chunk_type != TRANSLOG_CHUNK_FIXED &&
+         scanner.page[scanner.page_offset] != 0)
+  {
+    if (translog_get_next_chunk(&scanner))
+      DBUG_RETURN(LSN_ERROR);
+    chunk_type= scanner.page[scanner.page_offset] & TRANSLOG_CHUNK_TYPE;
+    DBUG_PRINT("info", ("type: %x  byte: %x", (uint) chunk_type,
+                        (uint) scanner.page[scanner.page_offset]));
+  }
+  if (scanner.page[scanner.page_offset] == 0)
+    DBUG_RETURN(LSN_IMPOSSIBLE); /* reached page filler */
+  DBUG_RETURN(scanner.page_addr + scanner.page_offset);
+}
+
 /**
    @brief returns the LSN of the first record starting in this log
 
@@ -6607,10 +6650,8 @@ LSN translog_first_lsn_in_log()
   TRANSLOG_ADDRESS addr, horizon= translog_get_horizon();
   TRANSLOG_VALIDATOR_DATA data;
   uint file;
-  uint chunk_type;
   uint16 chunk_offset;
   uchar *page;
-  TRANSLOG_SCANNER_DATA scanner;
   DBUG_ENTER("translog_first_lsn_in_log");
   DBUG_PRINT("info", ("Horizon: (%lu,0x%lx)", LSN_IN_PARTS(addr)));
   DBUG_ASSERT(translog_inited == 1);
@@ -6623,30 +6664,15 @@ LSN translog_first_lsn_in_log()
 
   addr= MAKE_LSN(file, TRANSLOG_PAGE_SIZE); /* the first page of the file */
   data.addr= &addr;
-  if ((page= translog_get_page(&data, scanner.buffer)) == NULL ||
+  {
+    uchar buffer[TRANSLOG_PAGE_SIZE];
+    if ((page= translog_get_page(&data, buffer)) == NULL ||
         (chunk_offset= translog_get_first_chunk_offset(page)) == 0)
       DBUG_RETURN(LSN_ERROR);
+  }
   addr+= chunk_offset;
-  if (addr == horizon)
-    DBUG_RETURN(LSN_IMPOSSIBLE);
-  translog_init_scanner(addr, 0, &scanner);
 
-  chunk_type= scanner.page[scanner.page_offset] & TRANSLOG_CHUNK_TYPE;
-  DBUG_PRINT("info", ("type: %x  byte: %x", (uint) chunk_type,
-                      (uint) scanner.page[scanner.page_offset]));
-  while (chunk_type != TRANSLOG_CHUNK_LSN &&
-         chunk_type != TRANSLOG_CHUNK_FIXED &&
-         scanner.page[scanner.page_offset] != 0)
-  {
-    if (translog_get_next_chunk(&scanner))
-      DBUG_RETURN(LSN_ERROR);
-    chunk_type= scanner.page[scanner.page_offset] & TRANSLOG_CHUNK_TYPE;
-    DBUG_PRINT("info", ("type: %x  byte: %x", (uint) chunk_type,
-                        (uint) scanner.page[scanner.page_offset]));
-  }
-  if (scanner.page[scanner.page_offset] == 0)
-    DBUG_RETURN(LSN_IMPOSSIBLE); /* reached page filler */
-  DBUG_RETURN(scanner.page_addr + scanner.page_offset);
+  DBUG_RETURN(translog_next_LSN(addr, horizon));
 }
 
 

storage/maria/ma_loghandler.h

@@ -274,6 +274,7 @@ extern my_bool translog_inited;
 
 extern LSN translog_first_lsn_in_log();
 extern LSN translog_first_theoretical_lsn();
+extern LSN translog_next_LSN(TRANSLOG_ADDRESS addr, TRANSLOG_ADDRESS horizon);
 
 /* record parts descriptor */
 struct st_translog_parts

storage/maria/ma_recovery.c

@@ -212,6 +212,13 @@ int maria_apply_log(LSN from_lsn, my_bool apply, FILE *trace_file,
       from_lsn= parse_checkpoint_record(last_checkpoint_lsn);
       if (from_lsn == LSN_IMPOSSIBLE)
         goto err;
+      from_lsn= translog_next_LSN(from_lsn, LSN_IMPOSSIBLE);
+      if (from_lsn == LSN_ERROR)
+        goto err;
+      /*
+        from_lsn LSN_IMPOSSIBLE will be correctly processed
+        by run_redo_phase()
+      */
     }
   }
 
@@ -1260,9 +1267,10 @@ static int run_redo_phase(LSN lsn, my_bool apply)
 
   TRANSLOG_HEADER_BUFFER rec;
 
-  if (unlikely(lsn == translog_get_horizon()))
+  if (unlikely(lsn == LSN_IMPOSSIBLE || lsn == translog_get_horizon()))
   {
-    fprintf(tracef, "Cannot find a first record, empty log, nothing to do.\n");
+    fprintf(tracef, "checkpoint address refers to the log end log or "
+            "log is empty, nothing to do.\n");
     return 0;
   }