diff --git a/myisam/mi_check.c b/myisam/mi_check.c
index 246d2c58dde..038ce8d953f 100644
--- a/myisam/mi_check.c
+++ b/myisam/mi_check.c
@@ -3193,9 +3193,11 @@ int sort_write_record(MI_SORT_PARAM *sort_param)
       break;
     case COMPRESSED_RECORD:
       reclength=info->packed_length;
-      length=save_pack_length(block_buff,reclength);
+      length= save_pack_length((uint) share->pack.version, block_buff,
+                               reclength);
       if (info->s->base.blobs)
-	length+=save_pack_length(block_buff+length,info->blob_length);
+	length+= save_pack_length((uint) share->pack.version,
+	                          block_buff + length, info->blob_length);
       if (my_b_write(&info->rec_cache,block_buff,length) ||
 	  my_b_write(&info->rec_cache,(byte*) sort_param->rec_buff,reclength))
       {
diff --git a/myisam/mi_packrec.c b/myisam/mi_packrec.c
index 1a71d43a7f1..322420b71db 100644
--- a/myisam/mi_packrec.c
+++ b/myisam/mi_packrec.c
@@ -149,11 +149,12 @@ my_bool _mi_read_pack_info(MI_INFO *info, pbool fix_keys)
       my_errno=HA_ERR_END_OF_FILE;
     goto err0;
   }
-  if (memcmp((byte*) header,(byte*) myisam_pack_file_magic,4))
+  if (memcmp((byte*) header, (byte*) myisam_pack_file_magic, 3))
   {
     my_errno=HA_ERR_WRONG_IN_RECORD;
     goto err0;
   }
+  share->pack.version= header[3];
   share->pack.header_length=	uint4korr(header+4);
   share->min_pack_length=(uint) uint4korr(header+8);
   share->max_pack_length=(uint) uint4korr(header+12);
@@ -1040,38 +1041,12 @@ uint _mi_pack_get_block_info(MI_INFO *myisam, MI_BLOCK_INFO *info, File file,
       return BLOCK_FATAL_ERROR;
     DBUG_DUMP("header",(byte*) header,ref_length);
   }
-  if (header[0] < 254)
-  {
-    info->rec_len=header[0];
-    head_length=1;
-  }
-  else if (header[0] == 254)
-  {
-    info->rec_len=uint2korr(header+1);
-    head_length=3;
-  }
-  else
-  {
-    info->rec_len=uint3korr(header+1);
-    head_length=4;
-  }
+  head_length= read_pack_length((uint) myisam->s->pack.version, header,
+                                &info->rec_len);
   if (myisam->s->base.blobs)
   {
-    if (header[head_length] < 254)
-    {
-      info->blob_len=header[head_length];
-      head_length++;
-    }
-    else if (header[head_length] == 254)
-    {
-      info->blob_len=uint2korr(header+head_length+1);
-      head_length+=3;
-    }
-    else
-    {
-      info->blob_len=uint3korr(header+head_length+1);
-      head_length+=4;
-    }
+    head_length+= read_pack_length((uint) myisam->s->pack.version,
+                                   header + head_length, &info->blob_len);
     if (!(mi_alloc_rec_buff(myisam,info->rec_len + info->blob_len,
 			    &myisam->rec_buff)))
       return BLOCK_FATAL_ERROR;			/* not enough memory */
@@ -1220,34 +1195,12 @@ void _mi_unmap_file(MI_INFO *info)
 static uchar *_mi_mempack_get_block_info(MI_INFO *myisam,MI_BLOCK_INFO *info,
 					 uchar *header)
 {
-  if (header[0] < 254)
-    info->rec_len= *header++;
-  else if (header[0] == 254)
-  {
-    info->rec_len=uint2korr(header+1);
-    header+=3;
-  }
-  else
-  {
-    info->rec_len=uint3korr(header+1);
-    header+=4;
-  }
+  header+= read_pack_length((uint) myisam->s->pack.version, header,
+                            &info->rec_len);
   if (myisam->s->base.blobs)
   {
-    if (header[0] < 254)
-    {
-      info->blob_len= *header++;
-    }
-    else if (header[0] == 254)
-    {
-      info->blob_len=uint2korr(header+1);
-      header+=3;
-    }
-    else
-    {
-      info->blob_len=uint3korr(header+1);
-      header+=4;
-    }
+    header+= read_pack_length((uint) myisam->s->pack.version, header,
+                              &info->blob_len);
     /* mi_alloc_rec_buff sets my_errno on error */
     if (!(mi_alloc_rec_buff(myisam, info->blob_len,
 			    &myisam->rec_buff)))
@@ -1319,7 +1272,7 @@ static int _mi_read_rnd_mempack_record(MI_INFO *info, byte *buf,
 
 	/* Save length of row */
 
-uint save_pack_length(byte *block_buff,ulong length)
+uint save_pack_length(uint version, byte *block_buff, ulong length)
 {
   if (length < 254)
   {
@@ -1333,6 +1286,46 @@ uint save_pack_length(byte *block_buff,ulong length)
     return 3;
   }
   *(uchar*) block_buff=255;
-  int3store(block_buff+1,(ulong) length);
-  return 4;
+  if (version == 1) /* old format */
+  {
+    DBUG_ASSERT(length <= 0xFFFFFF);
+    int3store(block_buff + 1, (ulong) length);
+    return 4;
+  }
+  else
+  {
+    int4store(block_buff + 1, (ulong) length);
+    return 5;
+  }
+}
+
+
+uint read_pack_length(uint version, const uchar *buf, ulong *length)
+{
+  if (buf[0] < 254)
+  {
+    *length= buf[0];
+    return 1;
+  }
+  else if (buf[0] == 254)
+  {
+    *length= uint2korr(buf + 1);
+    return 3;
+  }
+  if (version == 1) /* old format */
+  {
+    *length= uint3korr(buf + 1);
+    return 4;
+  }
+  else
+  {
+    *length= uint4korr(buf + 1);
+    return 5;
+  }
+}
+
+
+uint calc_pack_length(uint version, ulong length)
+{
+  return (length < 254) ? 1 : (length < 65536) ? 3 : (version == 1) ? 4 : 5;
 }
diff --git a/myisam/mi_static.c b/myisam/mi_static.c
index f41aeff8453..9725c120f44 100644
--- a/myisam/mi_static.c
+++ b/myisam/mi_static.c
@@ -27,7 +27,7 @@ LIST	*myisam_open_list=0;
 uchar	NEAR myisam_file_magic[]=
 { (uchar) 254, (uchar) 254,'\007', '\001', };
 uchar	NEAR myisam_pack_file_magic[]=
-{ (uchar) 254, (uchar) 254,'\010', '\001', };
+{ (uchar) 254, (uchar) 254,'\010', '\002', };
 my_string myisam_log_filename=(char*) "myisam.log";
 File	myisam_log_file= -1;
 uint	myisam_quick_table_bits=9;
diff --git a/myisam/myisamdef.h b/myisam/myisamdef.h
index a41bcf5449b..15b310e907e 100644
--- a/myisam/myisamdef.h
+++ b/myisam/myisamdef.h
@@ -149,6 +149,7 @@ typedef struct st_mi_blob		/* Info of record */
 typedef struct st_mi_isam_pack {
   ulong header_length;
   uint ref_length;
+  uchar version;
 } MI_PACK;
 
 
@@ -669,7 +670,9 @@ extern void _myisam_log_record(enum myisam_log_commands command,MI_INFO *info,
 			      int result);
 extern my_bool _mi_memmap_file(MI_INFO *info);
 extern void _mi_unmap_file(MI_INFO *info);
-extern uint save_pack_length(byte *block_buff,ulong length);
+extern uint save_pack_length(uint version, byte *block_buff, ulong length);
+extern uint read_pack_length(uint version, const uchar *buf, ulong *length);
+extern uint calc_pack_length(uint version, ulong length);
 
 uint mi_state_info_write(File file, MI_STATE_INFO *state, uint pWrite);
 char *mi_state_info_read(char *ptr, MI_STATE_INFO *state);
diff --git a/myisam/myisampack.c b/myisam/myisampack.c
index c5db66ef209..f017e4d23ab 100644
--- a/myisam/myisampack.c
+++ b/myisam/myisampack.c
@@ -1675,6 +1675,7 @@ static int compress_isam_file(PACK_MRG_INFO *mrg, HUFF_COUNTS *huff_counts)
   HUFF_COUNTS *count,*end_count;
   HUFF_TREE *tree;
   MI_INFO *isam_file=mrg->file[0];
+  uint pack_version= (uint) isam_file->s->pack.version;
   DBUG_ENTER("compress_isam_file");
 
   if (!(record=(byte*) my_alloca(isam_file->s->base.reclength)))
@@ -1702,23 +1703,10 @@ static int compress_isam_file(PACK_MRG_INFO *mrg, HUFF_COUNTS *huff_counts)
 	  huff_counts[i].tree->height+huff_counts[i].length_bits;
   }
   max_calc_length/=8;
-  if (max_calc_length < 254)
-    pack_ref_length=1;
-  else if (max_calc_length <= 65535)
-    pack_ref_length=3;
-  else
-    pack_ref_length=4;
+  pack_ref_length= calc_pack_length(pack_version, max_calc_length);
   record_count=0;
-  pack_blob_length=0;
-  if (isam_file->s->base.blobs)
-  {
-    if (mrg->max_blob_length < 254)
-      pack_blob_length=1;
-    else if (mrg->max_blob_length <= 65535)
-      pack_blob_length=3;
-    else
-      pack_blob_length=4;
-  }
+  pack_blob_length= isam_file->s->base.blobs ?
+                    calc_pack_length(pack_version, mrg->max_blob_length) : 0;
   max_pack_length=pack_ref_length+pack_blob_length;
 
   mrg_reset(mrg);
@@ -1874,9 +1862,10 @@ static int compress_isam_file(PACK_MRG_INFO *mrg, HUFF_COUNTS *huff_counts)
       }
       flush_bits();
       length=(ulong) (file_buffer.pos-record_pos)-max_pack_length;
-      pack_length=save_pack_length(record_pos,length);
+      pack_length= save_pack_length(pack_version, record_pos, length);
       if (pack_blob_length)
-	pack_length+=save_pack_length(record_pos+pack_length,tot_blob_length);
+	pack_length+= save_pack_length(pack_version, record_pos + pack_length,
+	                               tot_blob_length);
 
       /* Correct file buffer if the header was smaller */
       if (pack_length != max_pack_length)
diff --git a/mysql-test/r/func_gconcat.result b/mysql-test/r/func_gconcat.result
index a6c25fcd26c..12bc5ca2582 100644
--- a/mysql-test/r/func_gconcat.result
+++ b/mysql-test/r/func_gconcat.result
@@ -551,3 +551,12 @@ DROP TABLE t1,t2;
 select * from (select group_concat('c') from DUAL) t;
 group_concat('c')
 NULL
+create table t1 ( a int not null default 0);
+select * from (select group_concat(a) from t1) t2;
+group_concat(a)
+NULL
+select group_concat('x') UNION ALL select 1;
+group_concat('x')
+NULL
+1
+drop table t1;
diff --git a/mysql-test/t/func_gconcat.test b/mysql-test/t/func_gconcat.test
index 827a2813718..9e003d19ab9 100644
--- a/mysql-test/t/func_gconcat.test
+++ b/mysql-test/t/func_gconcat.test
@@ -348,4 +348,12 @@ DROP TABLE t1,t2;
 #
 select * from (select group_concat('c') from DUAL) t;
 
+#
+# Bug #12859 group_concat in subquery cause incorrect not null
+#
+create table t1 ( a int not null default 0);
+select * from (select group_concat(a) from t1) t2;
+select group_concat('x') UNION ALL select 1;
+drop table t1;
+
 # End of 4.1 tests
diff --git a/ndb/include/util/ndb_opts.h b/ndb/include/util/ndb_opts.h
index ca4ca5eac83..462d9996582 100644
--- a/ndb/include/util/ndb_opts.h
+++ b/ndb/include/util/ndb_opts.h
@@ -30,8 +30,14 @@ my_bool	opt_ndb_optimized_node_selection
 
 bool opt_endinfo= 0;
 my_bool opt_ndb_shm;
+my_bool opt_core;
 
 #define OPT_NDB_CONNECTSTRING 'c'
+#if defined VM_TRACE && ( ! ( defined NDB_OSE || defined NDB_SOFTOSE) )
+#define OPT_WANT_CORE_DEFAULT 1
+#else
+#define OPT_WANT_CORE_DEFAULT 0
+#endif
 
 #define NDB_STD_OPTS_COMMON \
   { "usage", '?', "Display this help and exit.", \
@@ -57,7 +63,10 @@ my_bool opt_ndb_shm;
     GET_BOOL, OPT_ARG, 1, 0, 0, 0, 0, 0},\
   { "connect-string", OPT_NDB_CONNECTSTRING, "same as --ndb-connectstring",\
     (gptr*) &opt_connect_str, (gptr*) &opt_connect_str, 0,\
-    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 }
+    GET_STR, REQUIRED_ARG, 0, 0, 0, 0, 0, 0 },\
+  { "core-file", OPT_WANT_CORE, "Write core on errors.",\
+    (gptr*) &opt_core, (gptr*) &opt_core, 0,\
+    GET_BOOL, NO_ARG, OPT_WANT_CORE_DEFAULT, 0, 0, 0, 0, 0}
 
 #ifndef DBUG_OFF
 #define NDB_STD_OPTS(prog_name) \
@@ -80,6 +89,7 @@ enum ndb_std_options {
   OPT_NDB_SHM= 256,
   OPT_NDB_SHM_SIGNUM,
   OPT_NDB_OPTIMIZED_NODE_SELECTION,
+  OPT_WANT_CORE,
   NDB_STD_OPTIONS_LAST /* should always be last in this enum */
 };
 
diff --git a/ndb/src/kernel/blocks/ndbcntr/NdbcntrMain.cpp b/ndb/src/kernel/blocks/ndbcntr/NdbcntrMain.cpp
index 2e2c834ad9c..071a85c96da 100644
--- a/ndb/src/kernel/blocks/ndbcntr/NdbcntrMain.cpp
+++ b/ndb/src/kernel/blocks/ndbcntr/NdbcntrMain.cpp
@@ -2493,6 +2493,14 @@ void Ndbcntr::Missra::sendNextSTTOR(Signal* signal){
     
     const Uint32 start = currentBlockIndex;
     
+    if (currentStartPhase == ZSTART_PHASE_6)
+    {
+      // Ndbd has passed the critical startphases.
+      // Change error handler from "startup" state
+      // to normal state.
+      ErrorReporter::setErrorHandlerShutdownType();
+    }
+
     for(; currentBlockIndex < ALL_BLOCKS_SZ; currentBlockIndex++){
       jam();
       if(ALL_BLOCKS[currentBlockIndex].NextSP == currentStartPhase){
diff --git a/ndb/src/kernel/error/ErrorReporter.cpp b/ndb/src/kernel/error/ErrorReporter.cpp
index e4ead4ce34d..25409db48a8 100644
--- a/ndb/src/kernel/error/ErrorReporter.cpp
+++ b/ndb/src/kernel/error/ErrorReporter.cpp
@@ -152,6 +152,14 @@ ErrorReporter::formatMessage(ErrorCategory type,
   return;
 }
 
+NdbShutdownType ErrorReporter::s_errorHandlerShutdownType = NST_ErrorHandler;
+
+void
+ErrorReporter::setErrorHandlerShutdownType(NdbShutdownType nst)
+{
+  s_errorHandlerShutdownType = nst;
+}
+
 void
 ErrorReporter::handleAssert(const char* message, const char* file, int line)
 {
@@ -170,7 +178,7 @@ ErrorReporter::handleAssert(const char* message, const char* file, int line)
   WriteMessage(assert, ERR_ERROR_PRGERR, message, refMessage,
 	       theEmulatedJamIndex, theEmulatedJam);
 
-  NdbShutdown(NST_ErrorHandler);
+  NdbShutdown(s_errorHandlerShutdownType);
 }
 
 void
@@ -182,7 +190,7 @@ ErrorReporter::handleThreadAssert(const char* message,
   BaseString::snprintf(refMessage, 100, "file: %s lineNo: %d - %s",
 	   file, line, message);
   
-  NdbShutdown(NST_ErrorHandler);
+  NdbShutdown(s_errorHandlerShutdownType);
 }//ErrorReporter::handleThreadAssert()
 
 
@@ -201,6 +209,8 @@ ErrorReporter::handleError(ErrorCategory type, int messageID,
   if(messageID == ERR_ERROR_INSERT){
     NdbShutdown(NST_ErrorInsert);
   } else {
+    if (nst == NST_ErrorHandler)
+      nst = s_errorHandlerShutdownType;
     NdbShutdown(nst);
   }
 }
diff --git a/ndb/src/kernel/error/ErrorReporter.hpp b/ndb/src/kernel/error/ErrorReporter.hpp
index 2c79f242eea..c5533df46f4 100644
--- a/ndb/src/kernel/error/ErrorReporter.hpp
+++ b/ndb/src/kernel/error/ErrorReporter.hpp
@@ -26,6 +26,7 @@
 class ErrorReporter
 {
 public:
+  static void setErrorHandlerShutdownType(NdbShutdownType nst = NST_ErrorHandler);
   static void handleAssert(const char* message, 
 			   const char* file, 
 			   int line);
@@ -57,6 +58,7 @@ public:
   static const char* formatTimeStampString();
   
 private:
+  static enum NdbShutdownType s_errorHandlerShutdownType;
 };
 
 #endif
diff --git a/ndb/src/kernel/main.cpp b/ndb/src/kernel/main.cpp
index 1cab3c96d19..aa220b0ae05 100644
--- a/ndb/src/kernel/main.cpp
+++ b/ndb/src/kernel/main.cpp
@@ -45,8 +45,14 @@ extern NdbMutex * theShutdownMutex;
 
 void catchsigs(bool ignore); // for process signal handling
 
+#define MAX_FAILED_STARTUPS 3
+// Flag set by child through SIGUSR1 to signal a failed startup
+static bool failed_startup_flag = false;
+// Counter for consecutive failed startups
+static Uint32 failed_startups = 0;
 extern "C" void handler_shutdown(int signum);  // for process signal handling
 extern "C" void handler_error(int signum);  // for process signal handling
+extern "C" void handler_sigusr1(int signum);  // child signalling failed restart
 
 // Shows system information
 void systemInfo(const Configuration & conf,
@@ -92,6 +98,8 @@ int main(int argc, char** argv)
   }
   
 #ifndef NDB_WIN32
+  signal(SIGUSR1, handler_sigusr1);
+
   for(pid_t child = fork(); child != 0; child = fork()){
     /**
      * Parent
@@ -137,6 +145,20 @@ int main(int argc, char** argv)
        */
       exit(0);
     }
+    if (!failed_startup_flag)
+    {
+      // Reset the counter for consecutive failed startups
+      failed_startups = 0;
+    }
+    else if (failed_startups >= MAX_FAILED_STARTUPS && !theConfig->stopOnError())
+    {
+      /**
+       * Error shutdown && stopOnError()
+       */
+      g_eventLogger.alert("Ndbd has failed %u consecutive startups. Not restarting", failed_startups);
+      exit(0);
+    }
+    failed_startup_flag = false;
     g_eventLogger.info("Ndb has terminated (pid %d) restarting", child);
     theConfig->fetch_configuration();
   }
@@ -170,6 +192,9 @@ int main(int argc, char** argv)
   /**
    * Do startup
    */
+
+  ErrorReporter::setErrorHandlerShutdownType(NST_ErrorHandlerStartup);
+
   switch(globalData.theRestartFlag){
   case initial_state:
     globalEmulatorData.theThreadConfig->doStart(NodeState::SL_CMVMI);
@@ -359,3 +384,15 @@ handler_error(int signum){
   BaseString::snprintf(errorData, 40, "Signal %d received", signum);
   ERROR_SET_SIGNAL(fatal, 0, errorData, __FILE__);
 }
+
+extern "C"
+void 
+handler_sigusr1(int signum)
+{
+  if (!failed_startup_flag)
+  {
+    failed_startups++;
+    failed_startup_flag = true;
+  }
+  g_eventLogger.info("Received signal %d. Ndbd failed startup (%u).", signum, failed_startups);
+}
diff --git a/ndb/src/kernel/vm/Emulator.cpp b/ndb/src/kernel/vm/Emulator.cpp
index f52233fc276..058829e05e2 100644
--- a/ndb/src/kernel/vm/Emulator.cpp
+++ b/ndb/src/kernel/vm/Emulator.cpp
@@ -39,6 +39,7 @@ extern "C" {
   extern void (* ndb_new_handler)();
 }
 extern EventLogger g_eventLogger;
+extern my_bool opt_core;
 
 /**
  * Declare the global variables 
@@ -154,6 +155,9 @@ NdbShutdown(NdbShutdownType type,
     case NST_ErrorHandlerSignal:
       g_eventLogger.info("Error handler signal %s system", shutting);
       break;
+    case NST_ErrorHandlerStartup:
+      g_eventLogger.info("Error handler startup %s system", shutting);
+      break;
     case NST_Restart:
       g_eventLogger.info("Restarting system");
       break;
@@ -165,23 +169,25 @@ NdbShutdown(NdbShutdownType type,
     }
     
     const char * exitAbort = 0;
-#if defined VM_TRACE && ( ! ( defined NDB_OSE || defined NDB_SOFTOSE) )
-    exitAbort = "aborting";
-#else
-    exitAbort = "exiting";
-#endif
+    if (opt_core)
+      exitAbort = "aborting";
+    else
+      exitAbort = "exiting";
     
     if(type == NST_Watchdog){
       /**
        * Very serious, don't attempt to free, just die!!
        */
       g_eventLogger.info("Watchdog shutdown completed - %s", exitAbort);
-#if defined VM_TRACE && ( ! ( defined NDB_OSE || defined NDB_SOFTOSE) )
-      signal(6, SIG_DFL);
-      abort();
-#else
-      exit(-1);
-#endif
+      if (opt_core)
+      {
+	signal(6, SIG_DFL);
+	abort();
+      }
+      else
+      {
+	exit(-1);
+      }
     }
 
 #ifndef NDB_WIN32
@@ -229,13 +235,19 @@ NdbShutdown(NdbShutdownType type,
     }
     
     if(type != NST_Normal && type != NST_Restart){
+      // Signal parent that error occured during startup
+      if (type == NST_ErrorHandlerStartup)
+	kill(getppid(), SIGUSR1);
       g_eventLogger.info("Error handler shutdown completed - %s", exitAbort);
-#if ( defined VM_TRACE || defined ERROR_INSERT ) && ( ! ( defined NDB_OSE || defined NDB_SOFTOSE) )
-      signal(6, SIG_DFL);
-      abort();
-#else
-      exit(-1);
-#endif
+      if (opt_core)
+      {
+	signal(6, SIG_DFL);
+	abort();
+      }
+      else
+      {
+	exit(-1);
+      }
     }
     
     /**
diff --git a/ndb/src/kernel/vm/Emulator.hpp b/ndb/src/kernel/vm/Emulator.hpp
index dba8cb3ab9b..cd194202d85 100644
--- a/ndb/src/kernel/vm/Emulator.hpp
+++ b/ndb/src/kernel/vm/Emulator.hpp
@@ -83,7 +83,8 @@ enum NdbShutdownType {
   NST_ErrorHandler,
   NST_ErrorHandlerSignal,
   NST_Restart,
-  NST_ErrorInsert
+  NST_ErrorInsert,
+  NST_ErrorHandlerStartup
 };
 
 enum NdbRestartType {
diff --git a/ndb/src/mgmsrv/ConfigInfo.cpp b/ndb/src/mgmsrv/ConfigInfo.cpp
index cface035174..36a72dcb975 100644
--- a/ndb/src/mgmsrv/ConfigInfo.cpp
+++ b/ndb/src/mgmsrv/ConfigInfo.cpp
@@ -25,6 +25,7 @@
 #include <m_string.h>
 
 extern my_bool opt_ndb_shm;
+extern my_bool opt_core;
 
 #define MAX_LINE_LENGTH 255
 #define KEY_INTERNAL 0
@@ -2140,11 +2141,10 @@ static void require(bool v)
 {
   if(!v)
   {
-#ifndef DBUG_OFF
-    abort();
-#else
-    exit(-1);
-#endif
+    if (opt_core)
+      abort();
+    else
+      exit(-1);
   }
 }
 
@@ -2214,7 +2214,7 @@ ConfigInfo::ConfigInfo()
       ndbout << "Error: Parameter " << param._fname
 	     << " defined twice in section " << param._section
 	     << "." << endl;
-      exit(-1);
+      require(false);
     }
     
     // Add new pinfo to section
@@ -2264,7 +2264,7 @@ ConfigInfo::ConfigInfo()
       ndbout << "Check that each entry has a section failed." << endl;
       ndbout << "Parameter \"" << m_ParamInfo[i]._fname << endl; 
       ndbout << "Edit file " << __FILE__ << "." << endl;
-      exit(-1);
+      require(false);
     }
     
     if(m_ParamInfo[i]._type == ConfigInfo::CI_SECTION)
@@ -2277,7 +2277,7 @@ ConfigInfo::ConfigInfo()
 	     << "\" does not exist in section \"" 
 	     << m_ParamInfo[i]._section << "\"." << endl;
       ndbout << "Edit file " << __FILE__ << "." << endl;
-      exit(-1);
+      require(false);
     }
   }
 }
diff --git a/ndb/src/mgmsrv/MgmtSrvr.cpp b/ndb/src/mgmsrv/MgmtSrvr.cpp
index 452dabc50e0..acab2ef9eac 100644
--- a/ndb/src/mgmsrv/MgmtSrvr.cpp
+++ b/ndb/src/mgmsrv/MgmtSrvr.cpp
@@ -65,6 +65,18 @@
 
 extern int global_flag_send_heartbeat_now;
 extern int g_no_nodeid_checks;
+extern my_bool opt_core;
+
+static void require(bool v)
+{
+  if(!v)
+  {
+    if (opt_core)
+      abort();
+    else
+      exit(-1);
+  }
+}
 
 void *
 MgmtSrvr::logLevelThread_C(void* m)
@@ -436,14 +448,14 @@ MgmtSrvr::MgmtSrvr(SocketServer *socket_server,
     if (tmp_nodeid == 0)
     {
       ndbout_c(m_config_retriever->getErrorString());
-      exit(-1);
+      require(false);
     }
     // read config from other managent server
     _config= fetchConfig();
     if (_config == 0)
     {
       ndbout << m_config_retriever->getErrorString() << endl;
-      exit(-1);
+      require(false);
     }
     _ownNodeId= tmp_nodeid;
   }
@@ -454,7 +466,7 @@ MgmtSrvr::MgmtSrvr(SocketServer *socket_server,
     _config= readConfig();
     if (_config == 0) {
       ndbout << "Unable to read config file" << endl;
-      exit(-1);
+      require(false);
     }
   }
 
@@ -511,7 +523,7 @@ MgmtSrvr::MgmtSrvr(SocketServer *socket_server,
   if ((m_node_id_mutex = NdbMutex_Create()) == 0)
   {
     ndbout << "mutex creation failed line = " << __LINE__ << endl;
-    exit(-1);
+    require(false);
   }
 
   if (_ownNodeId == 0) // we did not get node id from other server
@@ -522,7 +534,7 @@ MgmtSrvr::MgmtSrvr(SocketServer *socket_server,
 		       0, 0, error_string)){
       ndbout << "Unable to obtain requested nodeid: "
 	     << error_string.c_str() << endl;
-      exit(-1);
+      require(false);
     }
     _ownNodeId = tmp;
   }
@@ -533,7 +545,7 @@ MgmtSrvr::MgmtSrvr(SocketServer *socket_server,
 					  _ownNodeId))
     {
       ndbout << m_config_retriever->getErrorString() << endl;
-      exit(-1);
+      require(false);
     }
   }
 
@@ -2203,18 +2215,18 @@ MgmtSrvr::alloc_node_id(NodeId * nodeId,
     iter(*(ndb_mgm_configuration *)_config->m_configValues, CFG_SECTION_NODE);
   for(iter.first(); iter.valid(); iter.next()) {
     unsigned tmp= 0;
-    if(iter.get(CFG_NODE_ID, &tmp)) abort();
+    if(iter.get(CFG_NODE_ID, &tmp)) require(false);
     if (*nodeId && *nodeId != tmp)
       continue;
     found_matching_id= true;
-    if(iter.get(CFG_TYPE_OF_SECTION, &type_c)) abort();
+    if(iter.get(CFG_TYPE_OF_SECTION, &type_c)) require(false);
     if(type_c != (unsigned)type)
       continue;
     found_matching_type= true;
     if (connected_nodes.get(tmp))
       continue;
     found_free_node= true;
-    if(iter.get(CFG_NODE_HOST, &config_hostname)) abort();
+    if(iter.get(CFG_NODE_HOST, &config_hostname)) require(false);
     if (config_hostname && config_hostname[0] == 0)
       config_hostname= 0;
     else if (client_addr) {
@@ -2561,7 +2573,7 @@ MgmtSrvr::backupCallback(BackupEvent & event)
 int
 MgmtSrvr::repCommand(Uint32* repReqId, Uint32 request, bool waitCompleted)
 {
-  abort();
+  require(false);
   return 0;
 }
 
@@ -2715,7 +2727,7 @@ MgmtSrvr::setDbParameter(int node, int param, const char * value,
       ndbout_c("Updating node %d param: %d to %s",  node, param, val_char);
       break;
     default:
-      abort();
+      require(false);
     }
     assert(res);
   } while(node == 0 && iter.next() == 0);
diff --git a/ndb/src/mgmsrv/Services.cpp b/ndb/src/mgmsrv/Services.cpp
index 00cf6390c73..46bfb531b61 100644
--- a/ndb/src/mgmsrv/Services.cpp
+++ b/ndb/src/mgmsrv/Services.cpp
@@ -343,8 +343,6 @@ MgmApiSession::getConfig_old(Parser_t::Context &ctx) {
 }
 #endif /* MGM_GET_CONFIG_BACKWARDS_COMPAT */
 
-inline void require(bool b){ if(!b) abort(); }
-
 void
 MgmApiSession::getConfig(Parser_t::Context &ctx, 
 			 const class Properties &args) {
diff --git a/ndb/tools/Makefile.am b/ndb/tools/Makefile.am
index 89830129576..795441380a8 100644
--- a/ndb/tools/Makefile.am
+++ b/ndb/tools/Makefile.am
@@ -30,7 +30,7 @@ ndb_restore_SOURCES = restore/restore_main.cpp \
                       restore/consumer.cpp \
                       restore/consumer_restore.cpp \
                       restore/consumer_printer.cpp \
-                      restore/Restore.cpp
+                      restore/Restore.cpp $(tools_common_sources)
 
 ndb_config_SOURCES = ndb_config.cpp \
 	../src/mgmsrv/Config.cpp \
diff --git a/ndb/tools/ndb_config.cpp b/ndb/tools/ndb_config.cpp
index d188aec1337..725249a5af5 100644
--- a/ndb/tools/ndb_config.cpp
+++ b/ndb/tools/ndb_config.cpp
@@ -42,6 +42,7 @@ static const char * g_field_delimiter=",";
 static const char * g_row_delimiter=" ";
 
 int g_print_full_config, opt_ndb_shm;
+my_bool opt_core;
 
 typedef ndb_mgm_configuration_iterator Iter;
 
diff --git a/ndb/tools/restore/consumer_restore.cpp b/ndb/tools/restore/consumer_restore.cpp
index d782a561e6a..70ea7460d78 100644
--- a/ndb/tools/restore/consumer_restore.cpp
+++ b/ndb/tools/restore/consumer_restore.cpp
@@ -14,9 +14,12 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
+#include <NDBT_ReturnCodes.h>
 #include "consumer_restore.hpp"
 #include <NdbSleep.h>
 
+extern my_bool opt_core;
+
 extern FilteredNdbOut err;
 extern FilteredNdbOut info;
 extern FilteredNdbOut debug;
@@ -458,7 +461,11 @@ bool BackupRestore::errorHandler(restore_callback_t *cb)
 void BackupRestore::exitHandler() 
 {
   release();
-  exit(-1);
+  NDBT_ProgramExit(NDBT_FAILED);
+  if (opt_core)
+    abort();
+  else
+    exit(NDBT_FAILED);
 }
 
 
@@ -492,7 +499,7 @@ BackupRestore::logEntry(const LogEntry & tup)
   {
     // Deep shit, TODO: handle the error
     err << "Cannot start transaction" << endl;
-    exit(-1);
+    exitHandler();
   } // if
   
   const NdbDictionary::Table * table = get_table(tup.m_table->m_dictTable);
@@ -500,7 +507,7 @@ BackupRestore::logEntry(const LogEntry & tup)
   if (op == NULL) 
   {
     err << "Cannot get operation: " << trans->getNdbError() << endl;
-    exit(-1);
+    exitHandler();
   } // if
   
   int check = 0;
@@ -518,13 +525,13 @@ BackupRestore::logEntry(const LogEntry & tup)
   default:
     err << "Log entry has wrong operation type."
 	   << " Exiting...";
-    exit(-1);
+    exitHandler();
   }
 
   if (check != 0) 
   {
     err << "Error defining op: " << trans->getNdbError() << endl;
-    exit(-1);
+    exitHandler();
   } // if
   
   Bitmask<4096> keys;
@@ -553,7 +560,7 @@ BackupRestore::logEntry(const LogEntry & tup)
     if (check != 0) 
     {
       err << "Error defining op: " << trans->getNdbError() << endl;
-      exit(-1);
+      exitHandler();
     } // if
   }
   
@@ -582,7 +589,7 @@ BackupRestore::logEntry(const LogEntry & tup)
     if (!ok)
     {
       err << "execute failed: " << errobj << endl;
-      exit(-1);
+      exitHandler();
     }
   }
   
@@ -629,7 +636,7 @@ BackupRestore::tuple(const TupleS & tup)
     {
       // Deep shit, TODO: handle the error
       ndbout << "Cannot start transaction" << endl;
-      exit(-1);
+      exitHandler();
     } // if
     
     const TableS * table = tup.getTable();
@@ -638,7 +645,7 @@ BackupRestore::tuple(const TupleS & tup)
     {
       ndbout << "Cannot get operation: ";
       ndbout << trans->getNdbError() << endl;
-      exit(-1);
+      exitHandler();
     } // if
     
     // TODO: check return value and handle error
@@ -646,7 +653,7 @@ BackupRestore::tuple(const TupleS & tup)
     {
       ndbout << "writeTuple call failed: ";
       ndbout << trans->getNdbError() << endl;
-      exit(-1);
+      exitHandler();
     } // if
     
     for (int i = 0; i < tup.getNoOfAttributes(); i++) 
@@ -680,7 +687,7 @@ BackupRestore::tuple(const TupleS & tup)
     {
       ndbout << "execute failed: ";
       ndbout << trans->getNdbError() << endl;
-      exit(-1);
+      exitHandler();
     }
     m_ndb->closeTransaction(trans);
     if (ret == 0)
diff --git a/ndb/tools/restore/restore_main.cpp b/ndb/tools/restore/restore_main.cpp
index 0c4419bb072..d786dffe89e 100644
--- a/ndb/tools/restore/restore_main.cpp
+++ b/ndb/tools/restore/restore_main.cpp
@@ -20,6 +20,7 @@
 #include <ndb_limits.h>
 #include <NdbTCP.h>
 #include <NdbOut.hpp>
+#include <NDBT_ReturnCodes.h>
 
 #include "consumer_restore.hpp"
 #include "consumer_printer.hpp"
@@ -116,14 +117,14 @@ get_one_option(int optid, const struct my_option *opt __attribute__((unused)),
     if (ga_nodeId == 0)
     {
       printf("Error in --nodeid,-n setting, see --help\n");
-      exit(1);
+      exit(NDBT_ProgramExit(NDBT_WRONGARGS));
     }
     break;
   case 'b':
     if (ga_backupId == 0)
     {
       printf("Error in --backupid,-b setting, see --help\n");
-      exit(1);
+      exit(NDBT_ProgramExit(NDBT_WRONGARGS));
     }
     break;
   }
@@ -136,7 +137,7 @@ readArguments(int *pargc, char*** pargv)
   load_defaults("my",load_default_groups,pargc,pargv);
   if (handle_options(pargc, pargv, my_long_options, get_one_option))
   {
-    exit(1);
+    exit(NDBT_ProgramExit(NDBT_WRONGARGS));
   }
 
   BackupPrinter* printer = new BackupPrinter();
@@ -226,6 +227,15 @@ free_data_callback()
     g_consumers[i]->tuple_free();
 }
 
+static void exitHandler(int code)
+{
+  NDBT_ProgramExit(code);
+  if (opt_core)
+    abort();
+  else
+    exit(code);
+}
+
 int
 main(int argc, char** argv)
 {
@@ -233,7 +243,7 @@ main(int argc, char** argv)
 
   if (!readArguments(&argc, &argv))
   {
-    return -1;
+    exitHandler(NDBT_FAILED);
   }
 
   Ndb::setConnectString(opt_connect_str);
@@ -245,7 +255,7 @@ main(int argc, char** argv)
   if (!metaData.readHeader())
   {
     ndbout << "Failed to read " << metaData.getFilename() << endl << endl;
-    return -1;
+    exitHandler(NDBT_FAILED);
   }
 
   const BackupFormat::FileHeader & tmp = metaData.getFileHeader();
@@ -263,20 +273,20 @@ main(int argc, char** argv)
   if (res == 0)
   {
     ndbout_c("Restore: Failed to load content");
-    return -1;
+    exitHandler(NDBT_FAILED);
   }
   
   if (metaData.getNoOfTables() == 0) 
   {
     ndbout_c("Restore: The backup contains no tables ");
-    return -1;
+    exitHandler(NDBT_FAILED);
   }
 
 
   if (!metaData.validateFooter()) 
   {
     ndbout_c("Restore: Failed to validate footer.");
-    return -1;
+    exitHandler(NDBT_FAILED);
   }
 
   Uint32 i;
@@ -285,7 +295,7 @@ main(int argc, char** argv)
     if (!g_consumers[i]->init())
     {
       clearConsumers();
-      return -11;
+      exitHandler(NDBT_FAILED);
     }
 
   }
@@ -300,7 +310,7 @@ main(int argc, char** argv)
 	  ndbout_c("Restore: Failed to restore table: %s. "
 		   "Exiting...", 
 		   metaData[i]->getTableName());
-	  return -11;
+	  exitHandler(NDBT_FAILED);
 	} 
     }
   }
@@ -309,7 +319,7 @@ main(int argc, char** argv)
     if (!g_consumers[i]->endOfTables())
     {
       ndbout_c("Restore: Failed while closing tables");
-      return -11;
+      exitHandler(NDBT_FAILED);
     } 
   
   if (ga_restore || ga_print) 
@@ -322,7 +332,7 @@ main(int argc, char** argv)
       if (!dataIter.readHeader())
       {
 	ndbout << "Failed to read header of data file. Exiting..." ;
-	return -11;
+	exitHandler(NDBT_FAILED);
       }
       
       
@@ -340,12 +350,12 @@ main(int argc, char** argv)
 	{
 	  ndbout_c("Restore: An error occured while restoring data. "
 		   "Exiting...");
-	  return -1;
+	  exitHandler(NDBT_FAILED);
 	}
 	if (!dataIter.validateFragmentFooter()) {
 	  ndbout_c("Restore: Error validating fragment footer. "
 		   "Exiting...");
-	  return -1;
+	  exitHandler(NDBT_FAILED);
 	}
       } // while (dataIter.readFragmentHeader(res))
       
@@ -353,7 +363,7 @@ main(int argc, char** argv)
       {
 	err << "Restore: An error occured while restoring data. Exiting... "
 	    << "res=" << res << endl;
-	return -1;
+	exitHandler(NDBT_FAILED);
       }
       
       
@@ -366,7 +376,7 @@ main(int argc, char** argv)
       if (!logIter.readHeader())
       {
 	err << "Failed to read header of data file. Exiting..." << endl;
-	return -1;
+	exitHandler(NDBT_FAILED);
       }
       
       const LogEntry * logEntry = 0;
@@ -380,7 +390,7 @@ main(int argc, char** argv)
       {
 	err << "Restore: An restoring the data log. Exiting... res=" 
 	    << res << endl;
-	return -1;
+	exitHandler(NDBT_FAILED);
       }
       logIter.validateFooter(); //not implemented
       for (i= 0; i < g_consumers.size(); i++)
@@ -395,14 +405,14 @@ main(int argc, char** argv)
 	      ndbout_c("Restore: Failed to finalize restore table: %s. "
 		       "Exiting...", 
 		       metaData[i]->getTableName());
-	      return -11;
+	      exitHandler(NDBT_FAILED);
 	    } 
 	}
       }
     }
   }
   clearConsumers();
-  return 0;
+  return NDBT_ProgramExit(NDBT_OK);
 } // main
 
 template class Vector<BackupConsumer*>;