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/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include <ndb_global.h>
#include <my_pthread.h>
#include "WatchDog.hpp"
#include "GlobalData.hpp"
#include <NdbOut.hpp>
#include <NdbSleep.h>
#include <ErrorHandlingMacros.hpp>
extern "C"
void*
runWatchDog(void* w){
((WatchDog*)w)->run();
return NULL;
}
WatchDog::WatchDog(Uint32 interval) :
theIPValue(globalData.getWatchDogPtr())
{
setCheckInterval(interval);
theStop = false;
theThreadPtr = 0;
}
WatchDog::~WatchDog(){
doStop();
}
Uint32
WatchDog::setCheckInterval(Uint32 interval){
// An interval of less than 70ms is not acceptable
return theInterval = (interval < 70 ? 70 : interval);
}
void
WatchDog::doStart(){
theStop = false;
theThreadPtr = NdbThread_Create(runWatchDog,
(void**)this,
32768,
"ndb_watchdog",
NDB_THREAD_PRIO_HIGH);
}
void
WatchDog::doStop(){
void *status;
theStop = true;
if(theThreadPtr){
NdbThread_WaitFor(theThreadPtr, &status);
NdbThread_Destroy(&theThreadPtr);
}
}
void
WatchDog::run(){
unsigned int anIPValue;
unsigned int alerts = 0;
unsigned int oldIPValue = 0;
// WatchDog for the single threaded NDB
while(!theStop){
Uint32 tmp = theInterval / 500;
tmp= (tmp ? tmp : 1);
while(!theStop && tmp > 0){
NdbSleep_MilliSleep(500);
tmp--;
}
if(theStop)
break;
// Verify that the IP thread is not stuck in a loop
anIPValue = *theIPValue;
if(anIPValue != 0) {
oldIPValue = anIPValue;
globalData.incrementWatchDogCounter(0);
alerts = 0;
} else {
const char *last_stuck_action;
alerts++;
switch (oldIPValue) {
case 1:
last_stuck_action = "Job Handling";
break;
case 2:
last_stuck_action = "Scanning Timers";
break;
case 3:
last_stuck_action = "External I/O";
break;
case 4:
last_stuck_action = "Print Job Buffers at crash";
break;
case 5:
last_stuck_action = "Checking connections";
break;
case 6:
last_stuck_action = "Performing Send";
break;
case 7:
last_stuck_action = "Polling for Receive";
break;
case 8:
last_stuck_action = "Performing Receive";
break;
default:
last_stuck_action = "Unknown place";
break;
}//switch
ndbout << "Ndb kernel is stuck in: " << last_stuck_action << endl;
if(alerts == 3){
shutdownSystem(last_stuck_action);
}
}
}
return;
}
void
WatchDog::shutdownSystem(const char *last_stuck_action){
ErrorReporter::handleError(NDBD_EXIT_WATCHDOG_TERMINATE,
last_stuck_action,
__FILE__,
NST_Watchdog);
}
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