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https://issues.apache.org/jira/browse/STORM-1243?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15148708#comment-15148708
]
ASF GitHub Bot commented on STORM-1243:
---------------------------------------
Github user revans2 commented on a diff in the pull request:
https://github.com/apache/storm/pull/1111#discussion_r53020251
--- Diff: storm-core/src/jvm/org/apache/storm/command/HealthCheck.java ---
@@ -0,0 +1,124 @@
+/**
+ * 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.command;
+
+import org.apache.commons.lang.StringUtils;
+import org.apache.storm.Config;
+import org.apache.storm.utils.ConfigUtils;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+public class HealthCheck {
+ private static final String FAILED = "failed";
+ private static final String SUCCESS = "success";
+ private static final String TIMEOUT = "timeout";
+ private static final String FAILED_WITH_EXIT_CODE =
"failed_with_exit_code";
+
+ public static int healthCheck(Map conf) {
+ String healthDir = ConfigUtils.absoluteHealthCheckDir(conf);
+ List<String> results = new ArrayList<>();
+ if (healthDir != null) {
+ File parentFile = new File(healthDir);
+ List<String> healthScripts = new ArrayList<String>();
+ if (parentFile.exists()) {
+ File[] list = parentFile.listFiles();
+ for (File f : list) {
+ if (!f.isDirectory() && f.canExecute())
+ healthScripts.add(f.getAbsolutePath());
+ }
+ }
+ for (String script : healthScripts) {
+ String result = processScript(conf, script);
+ results.add(result);
+ }
+ }
+
+ // failed_with_exit_code is OK. We're mimicing Hadoop's health
checks.
+ // We treat non-zero exit codes as indicators that the scripts
failed
+ // to execute properly, not that the system is unhealthy, in which
case
+ // we don't want to start killing things.
+
+ if (results.contains(FAILED) || results.contains(TIMEOUT)) {
+ return 1;
+ } else {
+ return 0;
+ }
+
+ }
+
+ public static String processScript(Map conf, String script) {
+ Thread interruptThread = null;
+ try {
+ Process process = Runtime.getRuntime().exec(script);
+ final long timeout = (long)
(conf.get(Config.STORM_HEALTH_CHECK_TIMEOUT_MS));
+ final Thread curThread = Thread.currentThread();
+ // kill process when timeout
+ interruptThread = new Thread(new Runnable() {
+ @Override
+ public void run() {
+ try {
+ Thread.sleep(timeout);
+ curThread.interrupt();
+ } catch (InterruptedException e) {
+
+ }
+ }
+ });
+ interruptThread.start();
+ process.waitFor();
+ interruptThread.interrupt();
+
+ if (process.exitValue() != 0) {
+ String str;
+ InputStream stdin = process.getInputStream();
+ BufferedReader reader = new BufferedReader(new
InputStreamReader(stdin));
+ while ((str = reader.readLine()) != null) {
+ if (StringUtils.isBlank(str)) {
+ continue;
+ }
--- End diff --
I'm not sure this is needed. It doesn't hurt things, but str should never
be null because of the while, and if it is the empty string it will not start
with "ERROR"
> port backtype.storm.command.healthcheck to java
> -----------------------------------------------
>
> Key: STORM-1243
> URL: https://issues.apache.org/jira/browse/STORM-1243
> Project: Apache Storm
> Issue Type: New Feature
> Components: storm-core
> Reporter: Robert Joseph Evans
> Assignee: John Fang
> Labels: java-migration, jstorm-merger
>
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