Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/1257#discussion_r57892242
--- Diff:
storm-core/src/jvm/org/apache/storm/daemon/supervisor/SyncProcessEvent.java ---
@@ -0,0 +1,427 @@
+/**
+ * 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 org.apache.commons.io.FileUtils;
+import org.apache.commons.lang.StringUtils;
+import org.apache.storm.Config;
+import org.apache.storm.container.cgroup.CgroupManager;
+import org.apache.storm.daemon.supervisor.workermanager.IWorkerManager;
+import org.apache.storm.generated.ExecutorInfo;
+import org.apache.storm.generated.LSWorkerHeartbeat;
+import org.apache.storm.generated.LocalAssignment;
+import org.apache.storm.generated.WorkerResources;
+import org.apache.storm.utils.ConfigUtils;
+import org.apache.storm.utils.LocalState;
+import org.apache.storm.utils.Time;
+import org.apache.storm.utils.Utils;
+import org.eclipse.jetty.util.ConcurrentHashSet;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.yaml.snakeyaml.Yaml;
+
+import java.io.File;
+import java.io.FileWriter;
+import java.io.IOException;
+import java.util.*;
+
+/**
+ * 1. to kill are those in allocated that are dead or disallowed 2. kill
the ones that should be dead - read pids, kill -9 and individually remove file
- rmr
+ * heartbeat dir, rmdir pid dir, rmdir id dir (catch exception and log) 3.
of the rest, figure out what assignments aren't yet satisfied 4. generate new
worker
+ * ids, write new "approved workers" to LS 5. create local dir for worker
id 5. launch new workers (give worker-id, port, and supervisor-id) 6. wait for
workers
+ * launch
+ */
+public class SyncProcessEvent implements Runnable {
+
+ private static Logger LOG =
LoggerFactory.getLogger(SyncProcessEvent.class);
+
+ private LocalState localState;
+ private SupervisorData supervisorData;
+ public static final ExecutorInfo SYSTEM_EXECUTOR_INFO = new
ExecutorInfo(-1, -1);
+
+ private class ProcessExitCallback implements Utils.ExitCodeCallable {
+ private final String logPrefix;
+ private final String workerId;
+
+ public ProcessExitCallback(String logPrefix, String workerId) {
+ this.logPrefix = logPrefix;
+ this.workerId = workerId;
+ }
+
+ @Override
+ public Object call() throws Exception {
+ return null;
+ }
+
+ @Override
+ public Object call(int exitCode) {
+ LOG.info("{} exited with code: {}", logPrefix, exitCode);
+ supervisorData.getDeadWorkers().add(workerId);
+ return null;
+ }
+ }
+
+ public SyncProcessEvent(){
+
+ }
+ public SyncProcessEvent(SupervisorData supervisorData) {
+ init(supervisorData);
+ }
+
+ public void init(SupervisorData supervisorData){
+ this.supervisorData = supervisorData;
+ this.localState = supervisorData.getLocalState();
+ }
+
+ @Override
+ public void run() {
+ LOG.debug("Syncing processes");
+ try {
+ Map conf = supervisorData.getConf();
+ Map<Integer, LocalAssignment> assignedExecutors =
localState.getLocalAssignmentsMap();
+
+ if (assignedExecutors == null) {
+ assignedExecutors = new HashMap<>();
+ }
+ int now = Time.currentTimeSecs();
+
+ Map<String, StateHeartbeat> localWorkerStats =
getLocalWorkerStats(supervisorData, assignedExecutors, now);
+
+ Set<String> keeperWorkerIds = new HashSet<>();
+ Set<Integer> keepPorts = new HashSet<>();
+ for (Map.Entry<String, StateHeartbeat> entry :
localWorkerStats.entrySet()) {
+ StateHeartbeat stateHeartbeat = entry.getValue();
+ if (stateHeartbeat.getState() == State.VALID) {
+ keeperWorkerIds.add(entry.getKey());
+
keepPorts.add(stateHeartbeat.getHeartbeat().get_port());
+ }
+ }
+ Map<Integer, LocalAssignment> reassignExecutors =
getReassignExecutors(assignedExecutors, keepPorts);
+ Map<Integer, String> newWorkerIds = new HashMap<>();
+ for (Integer port : reassignExecutors.keySet()) {
+ newWorkerIds.put(port, Utils.uuid());
+ }
+ LOG.debug("Syncing processes");
--- End diff --
minor nit. We are logging this twice here and up above. It would probably
be good to just do it once.
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