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| <pre><span class="source-line-no">001</span><span id="line-1">/*</span> |
| <span class="source-line-no">002</span><span id="line-2"> * Licensed to the Apache Software Foundation (ASF) under one</span> |
| <span class="source-line-no">003</span><span id="line-3"> * or more contributor license agreements. See the NOTICE file</span> |
| <span class="source-line-no">004</span><span id="line-4"> * distributed with this work for additional information</span> |
| <span class="source-line-no">005</span><span id="line-5"> * regarding copyright ownership. The ASF licenses this file</span> |
| <span class="source-line-no">006</span><span id="line-6"> * to you under the Apache License, Version 2.0 (the</span> |
| <span class="source-line-no">007</span><span id="line-7"> * "License"); you may not use this file except in compliance</span> |
| <span class="source-line-no">008</span><span id="line-8"> * with the License. You may obtain a copy of the License at</span> |
| <span class="source-line-no">009</span><span id="line-9"> *</span> |
| <span class="source-line-no">010</span><span id="line-10"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <span class="source-line-no">011</span><span id="line-11"> *</span> |
| <span class="source-line-no">012</span><span id="line-12"> * Unless required by applicable law or agreed to in writing, software</span> |
| <span class="source-line-no">013</span><span id="line-13"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <span class="source-line-no">014</span><span id="line-14"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <span class="source-line-no">015</span><span id="line-15"> * See the License for the specific language governing permissions and</span> |
| <span class="source-line-no">016</span><span id="line-16"> * limitations under the License.</span> |
| <span class="source-line-no">017</span><span id="line-17"> */</span> |
| <span class="source-line-no">018</span><span id="line-18">package org.apache.hadoop.hbase;</span> |
| <span class="source-line-no">019</span><span id="line-19"></span> |
| <span class="source-line-no">020</span><span id="line-20">import org.apache.hadoop.conf.Configuration;</span> |
| <span class="source-line-no">021</span><span id="line-21">import org.apache.hadoop.hbase.HealthChecker.HealthCheckerExitStatus;</span> |
| <span class="source-line-no">022</span><span id="line-22">import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;</span> |
| <span class="source-line-no">023</span><span id="line-23">import org.apache.hadoop.util.StringUtils;</span> |
| <span class="source-line-no">024</span><span id="line-24">import org.apache.yetus.audience.InterfaceAudience;</span> |
| <span class="source-line-no">025</span><span id="line-25">import org.slf4j.Logger;</span> |
| <span class="source-line-no">026</span><span id="line-26">import org.slf4j.LoggerFactory;</span> |
| <span class="source-line-no">027</span><span id="line-27"></span> |
| <span class="source-line-no">028</span><span id="line-28">/**</span> |
| <span class="source-line-no">029</span><span id="line-29"> * The Class HealthCheckChore for running health checker regularly.</span> |
| <span class="source-line-no">030</span><span id="line-30"> */</span> |
| <span class="source-line-no">031</span><span id="line-31">@InterfaceAudience.Private</span> |
| <span class="source-line-no">032</span><span id="line-32">public class HealthCheckChore extends ScheduledChore {</span> |
| <span class="source-line-no">033</span><span id="line-33"> private static final Logger LOG = LoggerFactory.getLogger(HealthCheckChore.class);</span> |
| <span class="source-line-no">034</span><span id="line-34"> private HealthChecker healthChecker;</span> |
| <span class="source-line-no">035</span><span id="line-35"> private Configuration config;</span> |
| <span class="source-line-no">036</span><span id="line-36"> private int threshold;</span> |
| <span class="source-line-no">037</span><span id="line-37"> private int numTimesUnhealthy = 0;</span> |
| <span class="source-line-no">038</span><span id="line-38"> private long failureWindow;</span> |
| <span class="source-line-no">039</span><span id="line-39"> private long startWindow;</span> |
| <span class="source-line-no">040</span><span id="line-40"></span> |
| <span class="source-line-no">041</span><span id="line-41"> public HealthCheckChore(int sleepTime, Stoppable stopper, Configuration conf) {</span> |
| <span class="source-line-no">042</span><span id="line-42"> super("HealthChecker", stopper, sleepTime);</span> |
| <span class="source-line-no">043</span><span id="line-43"> LOG.info("Health Check Chore runs every " + StringUtils.formatTime(sleepTime));</span> |
| <span class="source-line-no">044</span><span id="line-44"> this.config = conf;</span> |
| <span class="source-line-no">045</span><span id="line-45"> String healthCheckScript = this.config.get(HConstants.HEALTH_SCRIPT_LOC);</span> |
| <span class="source-line-no">046</span><span id="line-46"> long scriptTimeout = this.config.getLong(HConstants.HEALTH_SCRIPT_TIMEOUT,</span> |
| <span class="source-line-no">047</span><span id="line-47"> HConstants.DEFAULT_HEALTH_SCRIPT_TIMEOUT);</span> |
| <span class="source-line-no">048</span><span id="line-48"> healthChecker = new HealthChecker();</span> |
| <span class="source-line-no">049</span><span id="line-49"> healthChecker.init(healthCheckScript, scriptTimeout);</span> |
| <span class="source-line-no">050</span><span id="line-50"> this.threshold = config.getInt(HConstants.HEALTH_FAILURE_THRESHOLD,</span> |
| <span class="source-line-no">051</span><span id="line-51"> HConstants.DEFAULT_HEALTH_FAILURE_THRESHOLD);</span> |
| <span class="source-line-no">052</span><span id="line-52"> this.failureWindow = (long) this.threshold * (long) sleepTime;</span> |
| <span class="source-line-no">053</span><span id="line-53"> }</span> |
| <span class="source-line-no">054</span><span id="line-54"></span> |
| <span class="source-line-no">055</span><span id="line-55"> @Override</span> |
| <span class="source-line-no">056</span><span id="line-56"> protected void chore() {</span> |
| <span class="source-line-no">057</span><span id="line-57"> HealthReport report = healthChecker.checkHealth();</span> |
| <span class="source-line-no">058</span><span id="line-58"> boolean isHealthy = (report.getStatus() == HealthCheckerExitStatus.SUCCESS);</span> |
| <span class="source-line-no">059</span><span id="line-59"> if (!isHealthy) {</span> |
| <span class="source-line-no">060</span><span id="line-60"> boolean needToStop = decideToStop();</span> |
| <span class="source-line-no">061</span><span id="line-61"> if (needToStop) {</span> |
| <span class="source-line-no">062</span><span id="line-62"> this.getStopper()</span> |
| <span class="source-line-no">063</span><span id="line-63"> .stop("The node reported unhealthy " + threshold + " number of times consecutively.");</span> |
| <span class="source-line-no">064</span><span id="line-64"> }</span> |
| <span class="source-line-no">065</span><span id="line-65"> // Always log health report.</span> |
| <span class="source-line-no">066</span><span id="line-66"> LOG.info("Health status at " + StringUtils.formatTime(EnvironmentEdgeManager.currentTime())</span> |
| <span class="source-line-no">067</span><span id="line-67"> + " : " + report.getHealthReport());</span> |
| <span class="source-line-no">068</span><span id="line-68"> }</span> |
| <span class="source-line-no">069</span><span id="line-69"> }</span> |
| <span class="source-line-no">070</span><span id="line-70"></span> |
| <span class="source-line-no">071</span><span id="line-71"> private boolean decideToStop() {</span> |
| <span class="source-line-no">072</span><span id="line-72"> boolean stop = false;</span> |
| <span class="source-line-no">073</span><span id="line-73"> if (numTimesUnhealthy == 0) {</span> |
| <span class="source-line-no">074</span><span id="line-74"> // First time we are seeing a failure. No need to stop, just</span> |
| <span class="source-line-no">075</span><span id="line-75"> // record the time.</span> |
| <span class="source-line-no">076</span><span id="line-76"> numTimesUnhealthy++;</span> |
| <span class="source-line-no">077</span><span id="line-77"> startWindow = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">078</span><span id="line-78"> } else {</span> |
| <span class="source-line-no">079</span><span id="line-79"> if ((EnvironmentEdgeManager.currentTime() - startWindow) < failureWindow) {</span> |
| <span class="source-line-no">080</span><span id="line-80"> numTimesUnhealthy++;</span> |
| <span class="source-line-no">081</span><span id="line-81"> if (numTimesUnhealthy == threshold) {</span> |
| <span class="source-line-no">082</span><span id="line-82"> stop = true;</span> |
| <span class="source-line-no">083</span><span id="line-83"> } else {</span> |
| <span class="source-line-no">084</span><span id="line-84"> stop = false;</span> |
| <span class="source-line-no">085</span><span id="line-85"> }</span> |
| <span class="source-line-no">086</span><span id="line-86"> } else {</span> |
| <span class="source-line-no">087</span><span id="line-87"> // Outside of failure window, so we reset to 1.</span> |
| <span class="source-line-no">088</span><span id="line-88"> numTimesUnhealthy = 1;</span> |
| <span class="source-line-no">089</span><span id="line-89"> startWindow = EnvironmentEdgeManager.currentTime();</span> |
| <span class="source-line-no">090</span><span id="line-90"> stop = false;</span> |
| <span class="source-line-no">091</span><span id="line-91"> }</span> |
| <span class="source-line-no">092</span><span id="line-92"> }</span> |
| <span class="source-line-no">093</span><span id="line-93"> return stop;</span> |
| <span class="source-line-no">094</span><span id="line-94"> }</span> |
| <span class="source-line-no">095</span><span id="line-95"></span> |
| <span class="source-line-no">096</span><span id="line-96">}</span> |
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| </pre> |
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