Fix for BUG#21345, Error in cluster logfile rotation.

Fixed the cluster logfile rotation code, let the cluster logfile be renamed correctly when the main logfile exceeds the configured maximum size.


ndb/include/util/File.hpp:
  Fix for BUG#21345, Error in cluster logfile rotation.
ndb/src/common/logger/FileLogHandler.cpp:
  Fix for BUG#21345, Error in cluster logfile rotation.
ndb/src/common/util/File.cpp:
  Fix for BUG#21345, Error in cluster logfile rotation.

ndb/include/util/File.hpp

@@ -28,6 +28,14 @@
 class File_class
 {
 public:
+  /**
+   * Returns time for last contents modification of a file.
+   *
+   * @param aFileName a filename to check.
+   * @return the time for last contents modificaton of the file.
+   */
+  static time_t mtime(const char* aFileName);      
+
   /**
    * Returns true if the file exist.
    *

ndb/src/common/logger/FileLogHandler.cpp

@@ -147,6 +147,7 @@ FileLogHandler::createNewFile()
   bool rc = true;	
   int fileNo = 1;
   char newName[PATH_MAX];
+  time_t newMtime, preMtime = 0;
 
   do
   {
@@ -159,7 +160,15 @@ FileLogHandler::createNewFile()
     }		
     BaseString::snprintf(newName, sizeof(newName),
 	       "%s.%d", m_pLogFile->getName(), fileNo++); 
-    
+    newMtime = File_class::mtime(newName);
+    if (newMtime < preMtime) 
+    {
+      break;
+    }
+    else
+    {
+      preMtime = newMtime;
+    }
   } while (File_class::exists(newName));
   
   m_pLogFile->close();	

ndb/src/common/util/File.cpp

@@ -24,6 +24,18 @@
 //
 // PUBLIC
 //
+time_t 
+File_class::mtime(const char* aFileName)
+{
+  MY_STAT stmp;
+  time_t rc = 0;
+
+  if (my_stat(aFileName, &stmp, MYF(0)) != NULL) {
+    rc = stmp.st_mtime;
+  }
+
+  return rc;
+}
 
 bool 
 File_class::exists(const char* aFileName)