ApplicationAttemptId appAttemptId = authorizeRequest();
this.amLivelinessMonitor.receivedPing(appAttemptId);
/* check if its in cache */
AllocateResponse lastResponse = responseMap.get(appAttemptId);
if (lastResponse == null) {
LOG.error("AppAttemptId doesnt exist in cache " + appAttemptId);
return resync;
}
if (!hasApplicationMasterRegistered(appAttemptId)) {
String message =
"Application Master is trying to allocate before registering for: "
+ appAttemptId.getApplicationId();
LOG.error(message);
RMAuditLogger.logFailure(
this.rmContext.getRMApps().get(appAttemptId.getApplicationId())
.getUser(), AuditConstants.REGISTER_AM, "",
"ApplicationMasterService", message, appAttemptId.getApplicationId(),
appAttemptId);
throw new InvalidApplicationMasterRequestException(message);
}
if ((request.getResponseId() + 1) == lastResponse.getResponseId()) {
/* old heartbeat */
return lastResponse;
} else if (request.getResponseId() + 1 < lastResponse.getResponseId()) {
LOG.error("Invalid responseid from appAttemptId " + appAttemptId);
// Oh damn! Sending reboot isn't enough. RM state is corrupted. TODO:
// Reboot is not useful since after AM reboots, it will send register and
// get an exception. Might as well throw an exception here.
return resync;
}
// Allow only one thread in AM to do heartbeat at a time.
synchronized (lastResponse) {
// Send the status update to the appAttempt.
this.rmContext.getDispatcher().getEventHandler().handle(
new RMAppAttemptStatusupdateEvent(appAttemptId, request
.getProgress()));
List<ResourceRequest> ask = request.getAskList();
List<ContainerId> release = request.getReleaseList();
ResourceBlacklistRequest blacklistRequest = request.getResourceBlacklistRequest();
List<String> blacklistAdditions =
(blacklistRequest != null) ?
blacklistRequest.getBlacklistAdditions() : null;
List<String> blacklistRemovals =
(blacklistRequest != null) ?
blacklistRequest.getBlacklistRemovals() : null;
// sanity check
try {
RMServerUtils.validateResourceRequests(ask,
rScheduler.getMaximumResourceCapability());
} catch (InvalidResourceRequestException e) {
LOG.warn("Invalid resource ask by application " + appAttemptId, e);
throw e;
}
try {
RMServerUtils.validateBlacklistRequest(blacklistRequest);
} catch (InvalidResourceBlacklistRequestException e) {
LOG.warn("Invalid blacklist request by application " + appAttemptId, e);
throw e;
}
try {
RMServerUtils.validateContainerReleaseRequest(release, appAttemptId);
} catch (InvalidContainerReleaseException e) {
LOG.warn("Invalid container release by application " + appAttemptId, e);
throw e;
}
// Send new requests to appAttempt.
Allocation allocation =
this.rScheduler.allocate(appAttemptId, ask, release,
blacklistAdditions, blacklistRemovals);
RMApp app = this.rmContext.getRMApps().get(
appAttemptId.getApplicationId());
RMAppAttempt appAttempt = app.getRMAppAttempt(appAttemptId);
AllocateResponse allocateResponse =
recordFactory.newRecordInstance(AllocateResponse.class);
// update the response with the deltas of node status changes
List<RMNode> updatedNodes = new ArrayList<RMNode>();
if(app.pullRMNodeUpdates(updatedNodes) > 0) {
List<NodeReport> updatedNodeReports = new ArrayList<NodeReport>();
for(RMNode rmNode: updatedNodes) {
SchedulerNodeReport schedulerNodeReport =
rScheduler.getNodeReport(rmNode.getNodeID());
Resource used = BuilderUtils.newResource(0, 0);
int numContainers = 0;
if (schedulerNodeReport != null) {
used = schedulerNodeReport.getUsedResource();
numContainers = schedulerNodeReport.getNumContainers();
}
NodeReport report = BuilderUtils.newNodeReport(rmNode.getNodeID(),
rmNode.getState(),
rmNode.getHttpAddress(), rmNode.getRackName(), used,
rmNode.getTotalCapability(), numContainers,
rmNode.getHealthReport(),
rmNode.getLastHealthReportTime());
updatedNodeReports.add(report);
}
allocateResponse.setUpdatedNodes(updatedNodeReports);
}
allocateResponse.setAllocatedContainers(allocation.getContainers());
allocateResponse.setCompletedContainersStatuses(appAttempt
.pullJustFinishedContainers());
allocateResponse.setResponseId(lastResponse.getResponseId() + 1);
allocateResponse.setAvailableResources(allocation.getResourceLimit());
allocateResponse.setNumClusterNodes(this.rScheduler.getNumClusterNodes());
// add preemption to the allocateResponse message (if any)
allocateResponse.setPreemptionMessage(generatePreemptionMessage(allocation));
// Adding NMTokens for allocated containers.
if (!allocation.getContainers().isEmpty()) {
allocateResponse.setNMTokens(rmContext.getNMTokenSecretManager()
.createAndGetNMTokens(app.getUser(), appAttemptId,
allocation.getContainers()));
}
// before returning response, verify in sync
AllocateResponse oldResponse =
responseMap.put(appAttemptId, allocateResponse);
if (oldResponse == null) {
// appAttempt got unregistered, remove it back out
responseMap.remove(appAttemptId);
String message = "App Attempt removed from the cache during allocate"