Github user revans2 commented on a diff in the pull request: https://github.com/apache/storm/pull/1642#discussion_r79031670 --- Diff: storm-core/src/jvm/org/apache/storm/daemon/supervisor/ReadClusterState.java --- @@ -0,0 +1,328 @@ +/** + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you under the Apache License, Version 2.0 (the + * "License"); you may not use this file except in compliance + * with the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ +package org.apache.storm.daemon.supervisor; + +import java.util.ArrayList; +import java.util.Collection; +import java.util.HashMap; +import java.util.HashSet; +import java.util.List; +import java.util.Map; +import java.util.Set; +import java.util.Map.Entry; +import java.util.concurrent.atomic.AtomicInteger; +import java.util.concurrent.atomic.AtomicReference; + +import org.apache.storm.Config; +import org.apache.storm.cluster.IStormClusterState; +import org.apache.storm.cluster.VersionedData; +import org.apache.storm.daemon.supervisor.Slot.MachineState; +import org.apache.storm.daemon.supervisor.Slot.TopoProfileAction; +import org.apache.storm.event.EventManager; +import org.apache.storm.generated.Assignment; +import org.apache.storm.generated.ExecutorInfo; +import org.apache.storm.generated.LocalAssignment; +import org.apache.storm.generated.NodeInfo; +import org.apache.storm.generated.ProfileRequest; +import org.apache.storm.generated.WorkerResources; +import org.apache.storm.localizer.ILocalizer; +import org.apache.storm.scheduler.ISupervisor; +import org.apache.storm.utils.LocalState; +import org.apache.storm.utils.Time; +import org.slf4j.Logger; +import org.slf4j.LoggerFactory; + +public class ReadClusterState implements Runnable, AutoCloseable { + private static final Logger LOG = LoggerFactory.getLogger(ReadClusterState.class); + + private final Map<String, Object> superConf; + private final IStormClusterState stormClusterState; + private final EventManager syncSupEventManager; + private final AtomicReference<Map<String, VersionedData<Assignment>>> assignmentVersions; + private final Map<Integer, Slot> slots = new HashMap<>(); + private final AtomicInteger readRetry = new AtomicInteger(0); + private final String assignmentId; + private final ISupervisor iSuper; + private final ILocalizer localizer; + private final ContainerLauncher launcher; + private final String host; + private final LocalState localState; + private final IStormClusterState clusterState; + private final AtomicReference<Map<Long, LocalAssignment>> cachedAssignments; + + public ReadClusterState(Supervisor supervisor) throws Exception { + this.superConf = supervisor.getConf(); + this.stormClusterState = supervisor.getStormClusterState(); + this.syncSupEventManager = supervisor.getEventManger(); + this.assignmentVersions = new AtomicReference<>(new HashMap<>()); + this.assignmentId = supervisor.getAssignmentId(); + this.iSuper = supervisor.getiSupervisor(); + this.localizer = supervisor.getAsyncLocalizer(); + this.host = supervisor.getHostName(); + this.localState = supervisor.getLocalState(); + this.clusterState = supervisor.getStormClusterState(); + this.cachedAssignments = supervisor.getCurrAssignment(); + + this.launcher = ContainerLauncher.make(superConf, assignmentId, supervisor.getSharedContext()); + + @SuppressWarnings("unchecked") + List<Number> ports = (List<Number>)superConf.get(Config.SUPERVISOR_SLOTS_PORTS); + for (Number port: ports) { + slots.put(port.intValue(), mkSlot(port.intValue())); + } + + try { + Collection<String> workers = SupervisorUtils.supervisorWorkerIds(superConf); + for (Slot slot: slots.values()) { + String workerId = slot.getWorkerId(); + if (workerId != null) { + workers.remove(workerId); + } + } + if (!workers.isEmpty()) { + supervisor.killWorkers(workers, launcher); + } + } catch (Exception e) { + LOG.warn("Error trying to clean up old workers", e); + } + + //All the slots/assignments should be recovered now, so we can clean up anything that we don't expect to be here + try { + localizer.cleanupUnusedTopologies(); + } catch (Exception e) { + LOG.warn("Error trying to clean up old topologies", e); + } + + for (Slot slot: slots.values()) { + slot.start(); + } + } + + private Slot mkSlot(int port) throws Exception { + return new Slot(localizer, superConf, launcher, host, port, + localState, clusterState, iSuper, cachedAssignments); + } + + @Override + public synchronized void run() { + try { + Runnable syncCallback = new EventManagerPushCallback(this, syncSupEventManager); + List<String> stormIds = stormClusterState.assignments(syncCallback); + Map<String, VersionedData<Assignment>> assignmentsSnapshot = + getAssignmentsSnapshot(stormClusterState, stormIds, assignmentVersions.get(), syncCallback); + + Map<Integer, LocalAssignment> allAssignments = + readAssignments(assignmentsSnapshot, assignmentId, readRetry); + if (allAssignments == null) { + //Something odd happened try again later + return; + } + Map<String, List<ProfileRequest>> topoIdToProfilerActions = getProfileActions(stormClusterState, stormIds); + + HashSet<Integer> assignedPorts = new HashSet<>(); + LOG.debug("Synchronizing supervisor"); + LOG.debug("All assignment: {}", allAssignments); + LOG.debug("Topology Ids -> Profiler Actions {}", topoIdToProfilerActions); + for (Integer port: allAssignments.keySet()) { + if (iSuper.confirmAssigned(port)) { + assignedPorts.add(port); + } + } + HashSet<Integer> allPorts = new HashSet<>(assignedPorts); + allPorts.addAll(slots.keySet()); + + Map<Integer, Set<TopoProfileAction>> filtered = new HashMap<>(); + for (Entry<String, List<ProfileRequest>> entry: topoIdToProfilerActions.entrySet()) { + String topoId = entry.getKey(); + if (entry.getValue() != null) { + for (ProfileRequest req: entry.getValue()) { + NodeInfo ni = req.get_nodeInfo(); + if (host.equals(ni.get_node())) { + Long port = ni.get_port().iterator().next(); + Set<TopoProfileAction> actions = filtered.get(port); + if (actions == null) { + actions = new HashSet<>(); + filtered.put(port.intValue(), actions); + } + actions.add(new TopoProfileAction(topoId, req)); + } + } + } + } + + for (Integer port: allPorts) { + Slot slot = slots.get(port); + if (slot == null) { + slot = mkSlot(port); + slots.put(port, slot); + slot.start(); + } + slot.setNewAssignment(allAssignments.get(port)); + slot.addProfilerActions(filtered.get(port)); + } + + } catch (Exception e) { + LOG.error("Failed to Sync Supervisor", e); + throw new RuntimeException(e); + } + } + + protected Map<String, VersionedData<Assignment>> getAssignmentsSnapshot(IStormClusterState stormClusterState, List<String> topoIds, + Map<String, VersionedData<Assignment>> localAssignmentVersion, Runnable callback) throws Exception { + Map<String, VersionedData<Assignment>> updateAssignmentVersion = new HashMap<>(); + for (String topoId : topoIds) { + Integer recordedVersion = -1; + Integer version = stormClusterState.assignmentVersion(topoId, callback); + VersionedData<Assignment> locAssignment = localAssignmentVersion.get(topoId); + if (locAssignment != null) { + recordedVersion = locAssignment.getVersion(); + } + if (version == null) { + // ignore + } else if (version == recordedVersion) { + updateAssignmentVersion.put(topoId, locAssignment); + } else { + VersionedData<Assignment> assignmentVersion = stormClusterState.assignmentInfoWithVersion(topoId, callback); + updateAssignmentVersion.put(topoId, assignmentVersion); + } + } + return updateAssignmentVersion; + } + + protected Map<String, List<ProfileRequest>> getProfileActions(IStormClusterState stormClusterState, List<String> stormIds) throws Exception { + Map<String, List<ProfileRequest>> ret = new HashMap<String, List<ProfileRequest>>(); + for (String stormId : stormIds) { + List<ProfileRequest> profileRequests = stormClusterState.getTopologyProfileRequests(stormId); + ret.put(stormId, profileRequests); + } + return ret; + } + + protected Map<Integer, LocalAssignment> readAssignments(Map<String, VersionedData<Assignment>> assignmentsSnapshot, + String assignmentId, AtomicInteger retries) { --- End diff -- This came from the original clojure code, that was then translated into java, and I just left it. The way it works right now is that there is a sleep in between the retries in the main thread. I wanted to fix it, but felt leaving it would be simpler. If you want me to I will change it.
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