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Rework dispatchedPlanVersion...fix races

This commit is contained in:
Andreas Streichardt 2016-04-25 16:40:35 +02:00
parent 3899ee7588
commit a889cf5710
1 changed files with 13 additions and 6 deletions
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19
arangod/Cluster/HeartbeatThread.cpp
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@ -126,7 +126,7 @@ void HeartbeatThread::runDBServer() {
if (version > _currentPlanVersion) {
_currentPlanVersion = version;
mustChangePlan = _dispatchedVersion == 0 && _lastSuccessfulVersion < _currentPlanVersion;
mustChangePlan = _lastSuccessfulVersion < _currentPlanVersion;
versionToChange = _currentPlanVersion;
}
}
@ -602,16 +602,23 @@ bool HeartbeatThread::handlePlanChangeDBServer(uint64_t currentPlanVersion) {
// schedule a job for the change
std::unique_ptr<arangodb::rest::Job> job(new ServerJob(this));
auto dispatcher = DispatcherFeature::DISPATCHER;
MUTEX_LOCKER(mutexLocker, _statusLock);
TRI_ASSERT(_dispatchedVersion == 0);
if (dispatcher->addJob(job) == TRI_ERROR_NO_ERROR) {
{
MUTEX_LOCKER(mutexLocker, _statusLock);
// mop: only dispatch one at a time
if (_dispatchedVersion > 0) {
return false;
}
_dispatchedVersion = currentPlanVersion;
}
if (dispatcher->addJob(job) == TRI_ERROR_NO_ERROR) {
LOG(TRACE) << "scheduled plan update handler";
return true;
}
MUTEX_LOCKER(mutexLocker, _statusLock);
_dispatchedVersion = 0;
LOG(ERR) << "could not schedule plan update handler";