Github user srdo commented on a diff in the pull request:
https://github.com/apache/storm/pull/1642#discussion_r77154288
--- Diff:
storm-core/src/jvm/org/apache/storm/daemon/supervisor/Container.java ---
@@ -0,0 +1,493 @@
+/**
+ * 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.io.BufferedReader;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.io.Reader;
+import java.io.Writer;
+import java.lang.ProcessBuilder.Redirect;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+
+import org.apache.storm.Config;
+import org.apache.storm.container.ResourceIsolationInterface;
+import org.apache.storm.generated.LSWorkerHeartbeat;
+import org.apache.storm.generated.LocalAssignment;
+import org.apache.storm.generated.ProfileRequest;
+import org.apache.storm.utils.ConfigUtils;
+import org.apache.storm.utils.LocalState;
+import org.apache.storm.utils.Utils;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.yaml.snakeyaml.Yaml;
+
+/**
+ * Represents a container that a worker will run in.
+ */
+public abstract class Container implements Killable {
+ private static final Logger LOG =
LoggerFactory.getLogger(BasicContainer.class);
+ protected final Map<String, Object> _conf;
+ protected final Map<String, Object> _topoConf;
+ protected String _workerId;
+ protected final String _topologyId;
+ protected final String _supervisorId;
+ protected final int _port;
+ protected final LocalAssignment _assignment;
+ protected final AdvancedFSOps _ops;
+ protected final ResourceIsolationInterface _resourceIsolationManager;
+
+ //Exposed for testing
+ protected Container(AdvancedFSOps ops, int port, LocalAssignment
assignment,
+ Map<String, Object> conf, Map<String, Object> topoConf, String
supervisorId,
+ ResourceIsolationInterface resourceIsolationManager) throws
IOException {
+ assert((assignment == null && port <= 0) ||
+ (assignment != null && port > 0));
+ assert(conf != null);
+ assert(ops != null);
+ assert(supervisorId != null);
+
+ _port = port;
+ _ops = ops;
+ _assignment = assignment;
+ if (assignment != null) {
+ _topologyId = assignment.get_topology_id();
+ } else {
+ _topologyId = null;
+ }
+ _conf = conf;
+ _supervisorId = supervisorId;
+ _resourceIsolationManager = resourceIsolationManager;
+ if (topoConf == null) {
+ _topoConf = readTopoConf();
+ } else {
+ _topoConf = topoConf;
+ }
+ }
+
+ @Override
+ public String toString() {
+ return this.getClass().getSimpleName() + " topo:" + _topologyId +
" worker:" + _workerId;
+ }
+
+ protected Map<String, Object> readTopoConf() throws IOException {
+ assert(_topologyId != null);
+ return ConfigUtils.readSupervisorStormConf(_conf, _topologyId);
+ }
+
+ protected Container(int port, LocalAssignment assignment, Map<String,
Object> conf,
+ String supervisorId, ResourceIsolationInterface
resourceIsolationManager) throws IOException {
+ this(AdvancedFSOps.make(conf), port, assignment, conf, null,
supervisorId, resourceIsolationManager);
+ }
+
+ /**
+ * Constructor to use when trying to recover a container from just the
worker ID.
+ * @param workerId the id of the worker
+ * @param conf the config of the supervisor
+ * @param supervisorId the id of the supervisor
+ * @param resourceIsolationManager the isolation manager.
+ * @throws IOException on any error
+ */
+ protected Container(String workerId, Map<String, Object> conf,
+ String supervisorId, ResourceIsolationInterface
resourceIsolationManager) throws IOException {
+ this(AdvancedFSOps.make(conf), -1, null, conf, null, supervisorId,
resourceIsolationManager);
+ }
+
+ /**
+ * Kill a given process
+ * @param pid the id of the process to kill
+ * @throws IOException
+ */
+ protected void kill(long pid) throws IOException {
+ Utils.killProcessWithSigTerm(String.valueOf(pid));
+ }
+
+ /**
+ * Kill a given process
+ * @param pid the id of the process to kill
+ * @throws IOException
+ */
+ protected void forceKill(long pid) throws IOException {
+ Utils.forceKillProcess(String.valueOf(pid));
+ }
+
+ @Override
+ public void kill() throws IOException {
+ LOG.info("Killing {}:{}", _supervisorId, _workerId);
+ Set<Long> pids = getAllPids();
+
+ for (Long pid : pids) {
+ kill(pid);
+ }
+ }
+
+ @Override
+ public void forceKill() throws IOException {
+ LOG.info("Force Killing {}:{}", _supervisorId, _workerId);
+ Set<Long> pids = getAllPids();
+
+ for (Long pid : pids) {
+ forceKill(pid);
+ }
+ }
+
+ /**
+ * Read the Heartbeat for the current container.
+ * @return the Heartbeat
+ * @throws IOException on any error
+ */
+ public LSWorkerHeartbeat readHeartbeat() throws IOException {
+ LocalState localState = ConfigUtils.workerState(_conf, _workerId);
+ LSWorkerHeartbeat hb = localState.getWorkerHeartBeat();
+ LOG.trace("{}: Reading heartbeat {}", _workerId, hb);
+ return hb;
+ }
+
+ /**
+ * Is a process alive and running?
+ * @param pid the PID of the running process
+ * @param user the user that is expected to own that process
+ * @return true if it is, else false
+ * @throws IOException on any error
+ */
+ protected boolean isProcessAlive(long pid, String user) throws
IOException {
+ if (Utils.IS_ON_WINDOWS) {
+ return isWindowsProcessAlive(pid, user);
+ }
+ return isPosixProcessAlive(pid, user);
+ }
+
+ private boolean isWindowsProcessAlive(long pid, String user) throws
IOException {
+ boolean ret = false;
--- End diff --
On my Windows 10 install, tasklist only outputs these fields: "Image Name,
PID, Session Name, Session#, Mem Usage", but there's a filter to get only
processes started by a user. For example:
`C:\Users\Stig>tasklist /nh /fi "pid eq 10300" /fi "username eq Stig"`
outputs
`bash.exe 10300 Console 21 1.484
K`
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