void doStatusCheck() {
long now = System.currentTimeMillis();
Set<InetAddress> eps = endpointStateMap_.keySet();
for (InetAddress endpoint : eps) {
if (endpoint.equals(localEndpoint_)) continue;
FailureDetector.instance.interpret(endpoint);
EndpointState epState = endpointStateMap_.get(endpoint);
if (epState != null) {
long duration = now - epState.getUpdateTimestamp();
if (StorageService.instance.getTokenMetadata().isMember(endpoint))
epState.setHasToken(true);
// check if this is a fat client. fat clients are removed automatically from
// gosip after FatClientTimeout
if (!epState.getHasToken()
&& !epState.isAlive()
&& !justRemovedEndpoints_.containsKey(endpoint)
&& (duration > FatClientTimeout_)) {
logger_.info(
"FatClient "
+ endpoint
+ " has been silent for "
+ FatClientTimeout_
+ "ms, removing from gossip");
removeEndpoint(
endpoint); // will put it in justRemovedEndpoints to respect quarantine delay
evictFromMembership(endpoint); // can get rid of the state immediately
}
if (!epState.isAlive() && (duration > aVeryLongTime_)) {
evictFromMembership(endpoint);
}
}
}
if (!justRemovedEndpoints_.isEmpty()) {
Map<InetAddress, Long> copy = new HashMap<InetAddress, Long>(justRemovedEndpoints_);
for (Map.Entry<InetAddress, Long> entry : copy.entrySet()) {
if ((now - entry.getValue()) > QUARANTINE_DELAY) {
if (logger_.isDebugEnabled())
logger_.debug(
QUARANTINE_DELAY + " elapsed, " + entry.getKey() + " gossip quarantine over");
justRemovedEndpoints_.remove(entry.getKey());
}
}
}
}
/** Start the gossiper with the generation # retrieved from the System table */
public void start(InetAddress localEndpoint, int generationNbr) {
localEndpoint_ = localEndpoint;
/* Get the seeds from the config and initialize them. */
Set<InetAddress> seedHosts = DatabaseDescriptor.getSeeds();
for (InetAddress seed : seedHosts) {
if (seed.equals(localEndpoint)) continue;
seeds_.add(seed);
}
/* initialize the heartbeat state for this localEndpoint */
EndpointState localState = endpointStateMap_.get(localEndpoint_);
if (localState == null) {
HeartBeatState hbState = new HeartBeatState(generationNbr);
localState = new EndpointState(hbState);
localState.isAlive(true);
localState.isAGossiper(true);
endpointStateMap_.put(localEndpoint_, localState);
}
// notify snitches that Gossiper is about to start
DatabaseDescriptor.getEndpointSnitch().gossiperStarting();
scheduledGossipTask =
StorageService.scheduledTasks.scheduleWithFixedDelay(
new GossipTask(),
Gossiper.intervalInMillis_,
Gossiper.intervalInMillis_,
TimeUnit.MILLISECONDS);
}
void markAlive(InetAddress addr, EndpointState localState) {
if (logger_.isTraceEnabled()) logger_.trace("marking as alive {}", addr);
if (!localState.isAlive()) {
isAlive(addr, localState, true);
logger_.info("InetAddress {} is now UP", addr);
}
}
/**
* This method is part of IFailureDetectionEventListener interface. This is invoked by the Failure
* Detector when it convicts an end point.
*
* <p>param @ endpoint end point that is convicted.
*/
public void convict(InetAddress endpoint) {
EndpointState epState = endpointStateMap_.get(endpoint);
if (epState.isAlive()) {
logger_.info("InetAddress {} is now dead.", endpoint);
isAlive(endpoint, epState, false);
}
}
/** This should *only* be used for testing purposes. */
public void initializeNodeUnsafe(InetAddress addr, int generationNbr) {
/* initialize the heartbeat state for this localEndpoint */
EndpointState localState = endpointStateMap_.get(addr);
if (localState == null) {
HeartBeatState hbState = new HeartBeatState(generationNbr);
localState = new EndpointState(hbState);
localState.isAlive(true);
localState.isAGossiper(true);
endpointStateMap_.put(addr, localState);
}
}
/** Add an endpoint we knew about previously, but whose state is unknown */
public void addSavedEndpoint(InetAddress ep) {
EndpointState epState = endpointStateMap_.get(ep);
if (epState == null) {
epState = new EndpointState(new HeartBeatState(0));
epState.isAlive(false);
epState.isAGossiper(true);
epState.setHasToken(true);
endpointStateMap_.put(ep, epState);
unreachableEndpoints_.put(ep, System.currentTimeMillis());
}
}
void isAlive(InetAddress addr, EndpointState epState, boolean value) {
epState.isAlive(value);
if (value) {
liveEndpoints_.add(addr);
unreachableEndpoints_.remove(addr);
for (IEndpointStateChangeSubscriber subscriber : subscribers_)
subscriber.onAlive(addr, epState);
} else {
liveEndpoints_.remove(addr);
unreachableEndpoints_.put(addr, System.currentTimeMillis());
for (IEndpointStateChangeSubscriber subscriber : subscribers_)
subscriber.onDead(addr, epState);
}
if (epState.isAGossiper()) return;
epState.isAGossiper(true);
}