Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/1184#discussion_r55712301
--- Diff:
storm-core/src/jvm/org/apache/storm/daemon/supervisor/SyncProcessEvent.java ---
@@ -0,0 +1,669 @@
+/**
+ * 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.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 extends ShutdownWork implements Runnable {
+
+ private static Logger LOG =
LoggerFactory.getLogger(SyncProcessEvent.class);
+
+ private LocalState localState;
+
+ private SupervisorData supervisorData;
+
+ 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);
+ }
+
+ //TODO: initData is intended to local supervisor, so we will remove
them after porting worker.clj to java
+ public void init(SupervisorData supervisorData){
+ this.supervisorData = supervisorData;
+ this.localState = supervisorData.getLocalState();
+ }
+
+
+ /**
+ * 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
+ */
+ @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");
+ LOG.debug("Assigned executors: {}", assignedExecutors);
+ LOG.debug("Allocated: {}", localWorkerStats);
+
+ for (Map.Entry<String, StateHeartbeat> entry :
localWorkerStats.entrySet()) {
+ StateHeartbeat stateHeartbeat = entry.getValue();
+ if (stateHeartbeat.getState() != State.valid) {
+ LOG.info("Shutting down and clearing state for id {},
Current supervisor time: {}, State: {}, Heartbeat: {}", entry.getKey(), now,
+ stateHeartbeat.getState(),
stateHeartbeat.getHeartbeat());
+ shutWorker(supervisorData, entry.getKey());
+ }
+ }
+ // start new workers
+ Map<String, Integer> newWorkerPortToIds =
startNewWorkers(newWorkerIds, reassignExecutors);
+
+ Map<String, Integer> allWorkerPortToIds = new HashMap<>();
+ Map<String, Integer> approvedWorkers =
localState.getApprovedWorkers();
+ for (String keeper : keeperWorkerIds) {
+ allWorkerPortToIds.put(keeper,
approvedWorkers.get(keeper));
+ }
+ allWorkerPortToIds.putAll(newWorkerPortToIds);
+ localState.setApprovedWorkers(allWorkerPortToIds);
+ waitForWorkersLaunch(conf, newWorkerPortToIds.keySet());
+
+ } catch (Exception e) {
+ LOG.error("Failed Sync Process", e);
+ throw Utils.wrapInRuntime(e);
+ }
+
+ }
+
+ protected void waitForWorkersLaunch(Map conf, Set<String> workerIds)
throws Exception {
+ int startTime = Time.currentTimeSecs();
+ int timeOut = (int)
conf.get(Config.NIMBUS_SUPERVISOR_TIMEOUT_SECS);
+ for (String workerId : workerIds) {
+ LocalState localState = ConfigUtils.workerState(conf,
workerId);
+ while (true) {
+ LSWorkerHeartbeat hb = localState.getWorkerHeartBeat();
+ if (hb != null || (Time.currentTimeSecs() - startTime) >
timeOut)
+ break;
+ LOG.info("{} still hasn't started", workerId);
+ Time.sleep(500);
+ }
+ if (localState.getWorkerHeartBeat() == null) {
+ LOG.info("Worker {} failed to start", workerId);
+ }
+ }
+ }
+
+ protected Map<Integer, LocalAssignment>
getReassignExecutors(Map<Integer, LocalAssignment> assignExecutors,
Set<Integer> keepPorts) {
+ Map<Integer, LocalAssignment> reassignExecutors = new HashMap<>();
+ reassignExecutors.putAll(assignExecutors);
+ for (Integer port : keepPorts) {
+ reassignExecutors.remove(port);
+ }
+ return reassignExecutors;
+ }
+
+
+
+ /**
+ * Returns map from worker id to worker heartbeat. if the heartbeat is
nil, then the worker is dead
+ *
+ * @param assignedExecutors
+ * @return
+ * @throws Exception
+ */
+ public Map<String, StateHeartbeat> getLocalWorkerStats(SupervisorData
supervisorData, Map<Integer, LocalAssignment> assignedExecutors, int now)
throws Exception {
+ Map<String, StateHeartbeat> workerIdHbstate = new HashMap<>();
+ Map conf = supervisorData.getConf();
+ LocalState localState = supervisorData.getLocalState();
+ Map<String, LSWorkerHeartbeat> idToHeartbeat =
SupervisorUtils.readWorkerHeartbeats(conf);
+ Map<String, Integer> approvedWorkers =
localState.getApprovedWorkers();
+ Set<String> approvedIds = new HashSet<>();
+ if (approvedWorkers != null) {
+ approvedIds.addAll(approvedWorkers.keySet());
+ }
+ for (Map.Entry<String, LSWorkerHeartbeat> entry :
idToHeartbeat.entrySet()) {
+ String workerId = entry.getKey();
+ LSWorkerHeartbeat whb = entry.getValue();
+ State state;
+ if (whb == null) {
+ state = State.notStarted;
+ } else if (!approvedIds.contains(workerId) ||
!matchesAssignment(whb, assignedExecutors)) {
+ state = State.disallowed;
+ } else if (supervisorData.getDeadWorkers().contains(workerId))
{
+ LOG.info("Worker Process {}as died", workerId);
+ state = State.timedOut;
+ } else if (SupervisorUtils.isWorkerHbTimedOut(now, whb, conf))
{
+ state = State.timedOut;
+ } else {
+ state = State.valid;
+ }
+ LOG.debug("Worker:{} state:{} WorkerHeartbeat:{} at supervisor
time-secs {}", workerId, state, whb, now);
+ workerIdHbstate.put(workerId, new StateHeartbeat(state, whb));
+ }
+ return workerIdHbstate;
+ }
+
+ protected boolean matchesAssignment(LSWorkerHeartbeat whb,
Map<Integer, LocalAssignment> assignedExecutors) {
+ LocalAssignment localAssignment =
assignedExecutors.get(whb.get_port());
+ if (localAssignment == null ||
!localAssignment.get_topology_id().equals(whb.get_topology_id())) {
+ return false;
+ }
+ List<ExecutorInfo> executorInfos = new ArrayList<>();
+ executorInfos.addAll(whb.get_executors());
+ // remove SYSTEM_EXECUTOR_ID
+ executorInfos.remove(new ExecutorInfo(-1, -1));
+ List<ExecutorInfo> localExecuorInfos =
localAssignment.get_executors();
+
+ if (localExecuorInfos.size() != executorInfos.size())
+ return false;
+
+ for (ExecutorInfo executorInfo : localExecuorInfos){
+ if (!localExecuorInfos.contains(executorInfo))
+ return false;
+ }
+ return true;
+ }
+
+ /**
+ * launch a worker in local mode.
+ */
+ protected void launchWorker(SupervisorData supervisorData, String
stormId, Long port, String workerId, WorkerResources resources) throws
IOException {
+ // port this function after porting worker to java
+ }
+
+ protected String getWorkerClassPath(String stormJar, Map stormConf) {
+ List<String> topoClasspath = new ArrayList<>();
+ Object object = stormConf.get(Config.TOPOLOGY_CLASSPATH);
+
+ if (object instanceof List) {
+ topoClasspath.addAll((List<String>) object);
+ } else if (object instanceof String){
+ topoClasspath.add((String)object);
+ }else {
+ //ignore
--- End diff --
The original code was
```
(let [...
topo-classpath (if-let [cp (storm-conf TOPOLOGY-CLASSPATH)]
[cp]
[])
... (Utils/addToClasspath something topo-classpath) ...
```
The Signature for Utils.addToClasspath is
```
public static String addToClasspath(String classpath, Collection<String>
paths);
```
if `cp` was anything but a `String` in that code we would get a
`ClassCastException` that would bring down the supervisor. This code is even
more lenient and supports both `String` and `List<String>`. Which fixes a bug
in our translation of the Utils code.
You are right that we don't want a bad user config to bring down a
supervisor, but if nimbus is doing the right thing and validating the config
before it goes to the supervisor we should never see this happen.
`TOPOLOGY_CLASSPATH` is annotated with ` @isStringOrStringList`. So if we ever
see `object` as something that is not a `String`, `List<String>`, or `null` it
means we have a bug in our code somewhere, and silently ignoring it feels wrong
to me.
I would be fine with us logging an error if it is something different, but
not totally ignoring it.
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