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<pre><span class="sourceLineNo">001</span>/*<a name="line.1"></a>
<span class="sourceLineNo">002</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.2"></a>
<span class="sourceLineNo">003</span> * or more contributor license agreements. See the NOTICE file<a name="line.3"></a>
<span class="sourceLineNo">004</span> * distributed with this work for additional information<a name="line.4"></a>
<span class="sourceLineNo">005</span> * regarding copyright ownership. The ASF licenses this file<a name="line.5"></a>
<span class="sourceLineNo">006</span> * to you under the Apache License, Version 2.0 (the<a name="line.6"></a>
<span class="sourceLineNo">007</span> * "License"); you may not use this file except in compliance<a name="line.7"></a>
<span class="sourceLineNo">008</span> * with the License. You may obtain a copy of the License at<a name="line.8"></a>
<span class="sourceLineNo">009</span> *<a name="line.9"></a>
<span class="sourceLineNo">010</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.10"></a>
<span class="sourceLineNo">011</span> *<a name="line.11"></a>
<span class="sourceLineNo">012</span> * Unless required by applicable law or agreed to in writing, software<a name="line.12"></a>
<span class="sourceLineNo">013</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.13"></a>
<span class="sourceLineNo">014</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.14"></a>
<span class="sourceLineNo">015</span> * See the License for the specific language governing permissions and<a name="line.15"></a>
<span class="sourceLineNo">016</span> * limitations under the License.<a name="line.16"></a>
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.ipc;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
<span class="sourceLineNo">020</span>import static org.hamcrest.CoreMatchers.instanceOf;<a name="line.20"></a>
<span class="sourceLineNo">021</span>import static org.hamcrest.MatcherAssert.assertThat;<a name="line.21"></a>
<span class="sourceLineNo">022</span>import static org.junit.Assert.assertFalse;<a name="line.22"></a>
<span class="sourceLineNo">023</span>import static org.junit.Assert.assertTrue;<a name="line.23"></a>
<span class="sourceLineNo">024</span><a name="line.24"></a>
<span class="sourceLineNo">025</span>import java.io.IOException;<a name="line.25"></a>
<span class="sourceLineNo">026</span>import java.lang.reflect.Constructor;<a name="line.26"></a>
<span class="sourceLineNo">027</span>import java.lang.reflect.InvocationTargetException;<a name="line.27"></a>
<span class="sourceLineNo">028</span>import java.util.ArrayList;<a name="line.28"></a>
<span class="sourceLineNo">029</span>import java.util.List;<a name="line.29"></a>
<span class="sourceLineNo">030</span>import java.util.concurrent.CompletableFuture;<a name="line.30"></a>
<span class="sourceLineNo">031</span>import java.util.concurrent.TimeoutException;<a name="line.31"></a>
<span class="sourceLineNo">032</span>import org.apache.commons.lang3.mutable.MutableInt;<a name="line.32"></a>
<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.HBaseClassTestRule;<a name="line.33"></a>
<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.client.RegionInfoBuilder;<a name="line.34"></a>
<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.exceptions.ClientExceptionsUtil;<a name="line.35"></a>
<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.exceptions.TimeoutIOException;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.net.Address;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.testclassification.ClientTests;<a name="line.38"></a>
<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.testclassification.SmallTests;<a name="line.39"></a>
<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.util.FutureUtils;<a name="line.40"></a>
<span class="sourceLineNo">041</span>import org.junit.ClassRule;<a name="line.41"></a>
<span class="sourceLineNo">042</span>import org.junit.Test;<a name="line.42"></a>
<span class="sourceLineNo">043</span>import org.junit.experimental.categories.Category;<a name="line.43"></a>
<span class="sourceLineNo">044</span><a name="line.44"></a>
<span class="sourceLineNo">045</span>import org.apache.hbase.thirdparty.io.netty.channel.DefaultEventLoop;<a name="line.45"></a>
<span class="sourceLineNo">046</span>import org.apache.hbase.thirdparty.io.netty.channel.EventLoop;<a name="line.46"></a>
<span class="sourceLineNo">047</span><a name="line.47"></a>
<span class="sourceLineNo">048</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.RPCProtos.ExceptionResponse;<a name="line.48"></a>
<span class="sourceLineNo">049</span><a name="line.49"></a>
<span class="sourceLineNo">050</span>@Category({ ClientTests.class, SmallTests.class })<a name="line.50"></a>
<span class="sourceLineNo">051</span>public class TestIPCUtil {<a name="line.51"></a>
<span class="sourceLineNo">052</span><a name="line.52"></a>
<span class="sourceLineNo">053</span> @ClassRule<a name="line.53"></a>
<span class="sourceLineNo">054</span> public static final HBaseClassTestRule CLASS_RULE =<a name="line.54"></a>
<span class="sourceLineNo">055</span> HBaseClassTestRule.forClass(TestIPCUtil.class);<a name="line.55"></a>
<span class="sourceLineNo">056</span><a name="line.56"></a>
<span class="sourceLineNo">057</span> private static Throwable create(Class&lt;? extends Throwable&gt; clazz) throws InstantiationException,<a name="line.57"></a>
<span class="sourceLineNo">058</span> IllegalAccessException, InvocationTargetException, NoSuchMethodException {<a name="line.58"></a>
<span class="sourceLineNo">059</span> try {<a name="line.59"></a>
<span class="sourceLineNo">060</span> Constructor&lt;? extends Throwable&gt; c = clazz.getDeclaredConstructor();<a name="line.60"></a>
<span class="sourceLineNo">061</span> c.setAccessible(true);<a name="line.61"></a>
<span class="sourceLineNo">062</span> return c.newInstance();<a name="line.62"></a>
<span class="sourceLineNo">063</span> } catch (NoSuchMethodException e) {<a name="line.63"></a>
<span class="sourceLineNo">064</span> // fall through<a name="line.64"></a>
<span class="sourceLineNo">065</span> }<a name="line.65"></a>
<span class="sourceLineNo">066</span><a name="line.66"></a>
<span class="sourceLineNo">067</span> try {<a name="line.67"></a>
<span class="sourceLineNo">068</span> Constructor&lt;? extends Throwable&gt; c = clazz.getDeclaredConstructor(String.class);<a name="line.68"></a>
<span class="sourceLineNo">069</span> c.setAccessible(true);<a name="line.69"></a>
<span class="sourceLineNo">070</span> return c.newInstance("error");<a name="line.70"></a>
<span class="sourceLineNo">071</span> } catch (NoSuchMethodException e) {<a name="line.71"></a>
<span class="sourceLineNo">072</span> // fall through<a name="line.72"></a>
<span class="sourceLineNo">073</span> }<a name="line.73"></a>
<span class="sourceLineNo">074</span><a name="line.74"></a>
<span class="sourceLineNo">075</span> try {<a name="line.75"></a>
<span class="sourceLineNo">076</span> Constructor&lt;? extends Throwable&gt; c = clazz.getDeclaredConstructor(Throwable.class);<a name="line.76"></a>
<span class="sourceLineNo">077</span> c.setAccessible(true);<a name="line.77"></a>
<span class="sourceLineNo">078</span> return c.newInstance(new Exception("error"));<a name="line.78"></a>
<span class="sourceLineNo">079</span> } catch (NoSuchMethodException e) {<a name="line.79"></a>
<span class="sourceLineNo">080</span> // fall through<a name="line.80"></a>
<span class="sourceLineNo">081</span> }<a name="line.81"></a>
<span class="sourceLineNo">082</span><a name="line.82"></a>
<span class="sourceLineNo">083</span> try {<a name="line.83"></a>
<span class="sourceLineNo">084</span> Constructor&lt;? extends Throwable&gt; c =<a name="line.84"></a>
<span class="sourceLineNo">085</span> clazz.getDeclaredConstructor(String.class, Throwable.class);<a name="line.85"></a>
<span class="sourceLineNo">086</span> c.setAccessible(true);<a name="line.86"></a>
<span class="sourceLineNo">087</span> return c.newInstance("error", new Exception("error"));<a name="line.87"></a>
<span class="sourceLineNo">088</span> } catch (NoSuchMethodException e) {<a name="line.88"></a>
<span class="sourceLineNo">089</span> // fall through<a name="line.89"></a>
<span class="sourceLineNo">090</span> }<a name="line.90"></a>
<span class="sourceLineNo">091</span><a name="line.91"></a>
<span class="sourceLineNo">092</span> Constructor&lt;? extends Throwable&gt; c =<a name="line.92"></a>
<span class="sourceLineNo">093</span> clazz.getDeclaredConstructor(Throwable.class, Throwable.class);<a name="line.93"></a>
<span class="sourceLineNo">094</span> c.setAccessible(true);<a name="line.94"></a>
<span class="sourceLineNo">095</span> return c.newInstance(new Exception("error"), "error");<a name="line.95"></a>
<span class="sourceLineNo">096</span> }<a name="line.96"></a>
<span class="sourceLineNo">097</span><a name="line.97"></a>
<span class="sourceLineNo">098</span> /**<a name="line.98"></a>
<span class="sourceLineNo">099</span> * See HBASE-21862, it is important to keep original exception type for connection exceptions.<a name="line.99"></a>
<span class="sourceLineNo">100</span> */<a name="line.100"></a>
<span class="sourceLineNo">101</span> @Test<a name="line.101"></a>
<span class="sourceLineNo">102</span> public void testWrapConnectionException() throws Exception {<a name="line.102"></a>
<span class="sourceLineNo">103</span> List&lt;Throwable&gt; exceptions = new ArrayList&lt;&gt;();<a name="line.103"></a>
<span class="sourceLineNo">104</span> for (Class&lt;? extends Throwable&gt; clazz : ClientExceptionsUtil.getConnectionExceptionTypes()) {<a name="line.104"></a>
<span class="sourceLineNo">105</span> exceptions.add(create(clazz));<a name="line.105"></a>
<span class="sourceLineNo">106</span> }<a name="line.106"></a>
<span class="sourceLineNo">107</span> Address addr = Address.fromParts("127.0.0.1", 12345);<a name="line.107"></a>
<span class="sourceLineNo">108</span> for (Throwable exception : exceptions) {<a name="line.108"></a>
<span class="sourceLineNo">109</span> if (exception instanceof TimeoutException) {<a name="line.109"></a>
<span class="sourceLineNo">110</span> assertThat(IPCUtil.wrapException(addr, null, exception),<a name="line.110"></a>
<span class="sourceLineNo">111</span> instanceOf(TimeoutIOException.class));<a name="line.111"></a>
<span class="sourceLineNo">112</span> } else {<a name="line.112"></a>
<span class="sourceLineNo">113</span> IOException ioe =<a name="line.113"></a>
<span class="sourceLineNo">114</span> IPCUtil.wrapException(addr, RegionInfoBuilder.FIRST_META_REGIONINFO, exception);<a name="line.114"></a>
<span class="sourceLineNo">115</span> // Assert that the exception contains the Region name if supplied. HBASE-25735.<a name="line.115"></a>
<span class="sourceLineNo">116</span> // Not all exceptions get the region stuffed into it.<a name="line.116"></a>
<span class="sourceLineNo">117</span> if (ioe.getMessage() != null) {<a name="line.117"></a>
<span class="sourceLineNo">118</span> assertTrue(ioe.getMessage()<a name="line.118"></a>
<span class="sourceLineNo">119</span> .contains(RegionInfoBuilder.FIRST_META_REGIONINFO.getRegionNameAsString()));<a name="line.119"></a>
<span class="sourceLineNo">120</span> }<a name="line.120"></a>
<span class="sourceLineNo">121</span> assertThat(ioe, instanceOf(exception.getClass()));<a name="line.121"></a>
<span class="sourceLineNo">122</span> }<a name="line.122"></a>
<span class="sourceLineNo">123</span> }<a name="line.123"></a>
<span class="sourceLineNo">124</span> }<a name="line.124"></a>
<span class="sourceLineNo">125</span><a name="line.125"></a>
<span class="sourceLineNo">126</span> @Test<a name="line.126"></a>
<span class="sourceLineNo">127</span> public void testExecute() throws Exception {<a name="line.127"></a>
<span class="sourceLineNo">128</span> EventLoop eventLoop = new DefaultEventLoop();<a name="line.128"></a>
<span class="sourceLineNo">129</span> MutableInt executed = new MutableInt(0);<a name="line.129"></a>
<span class="sourceLineNo">130</span> MutableInt numStackTraceElements = new MutableInt(0);<a name="line.130"></a>
<span class="sourceLineNo">131</span> CompletableFuture&lt;Void&gt; future = new CompletableFuture&lt;&gt;();<a name="line.131"></a>
<span class="sourceLineNo">132</span> try {<a name="line.132"></a>
<span class="sourceLineNo">133</span> IPCUtil.execute(eventLoop, new Runnable() {<a name="line.133"></a>
<span class="sourceLineNo">134</span><a name="line.134"></a>
<span class="sourceLineNo">135</span> @Override<a name="line.135"></a>
<span class="sourceLineNo">136</span> public void run() {<a name="line.136"></a>
<span class="sourceLineNo">137</span> int numElements = new Exception().getStackTrace().length;<a name="line.137"></a>
<span class="sourceLineNo">138</span> int depth = executed.getAndIncrement();<a name="line.138"></a>
<span class="sourceLineNo">139</span> if (depth &lt;= IPCUtil.MAX_DEPTH) {<a name="line.139"></a>
<span class="sourceLineNo">140</span> if (numElements &lt;= numStackTraceElements.intValue()) {<a name="line.140"></a>
<span class="sourceLineNo">141</span> future.completeExceptionally(<a name="line.141"></a>
<span class="sourceLineNo">142</span> new AssertionError("should call run directly but stack trace decreased from "<a name="line.142"></a>
<span class="sourceLineNo">143</span> + numStackTraceElements.intValue() + " to " + numElements));<a name="line.143"></a>
<span class="sourceLineNo">144</span> return;<a name="line.144"></a>
<span class="sourceLineNo">145</span> }<a name="line.145"></a>
<span class="sourceLineNo">146</span> numStackTraceElements.setValue(numElements);<a name="line.146"></a>
<span class="sourceLineNo">147</span> IPCUtil.execute(eventLoop, this);<a name="line.147"></a>
<span class="sourceLineNo">148</span> } else {<a name="line.148"></a>
<span class="sourceLineNo">149</span> if (numElements &gt;= numStackTraceElements.intValue()) {<a name="line.149"></a>
<span class="sourceLineNo">150</span> future.completeExceptionally(<a name="line.150"></a>
<span class="sourceLineNo">151</span> new AssertionError("should call eventLoop.execute to prevent stack overflow but"<a name="line.151"></a>
<span class="sourceLineNo">152</span> + " stack trace increased from " + numStackTraceElements.intValue() + " to "<a name="line.152"></a>
<span class="sourceLineNo">153</span> + numElements));<a name="line.153"></a>
<span class="sourceLineNo">154</span> } else {<a name="line.154"></a>
<span class="sourceLineNo">155</span> future.complete(null);<a name="line.155"></a>
<span class="sourceLineNo">156</span> }<a name="line.156"></a>
<span class="sourceLineNo">157</span> }<a name="line.157"></a>
<span class="sourceLineNo">158</span> }<a name="line.158"></a>
<span class="sourceLineNo">159</span> });<a name="line.159"></a>
<span class="sourceLineNo">160</span> FutureUtils.get(future);<a name="line.160"></a>
<span class="sourceLineNo">161</span> } finally {<a name="line.161"></a>
<span class="sourceLineNo">162</span> eventLoop.shutdownGracefully().get();<a name="line.162"></a>
<span class="sourceLineNo">163</span> }<a name="line.163"></a>
<span class="sourceLineNo">164</span> }<a name="line.164"></a>
<span class="sourceLineNo">165</span><a name="line.165"></a>
<span class="sourceLineNo">166</span> @Test<a name="line.166"></a>
<span class="sourceLineNo">167</span> public void testIsFatalConnectionException() {<a name="line.167"></a>
<span class="sourceLineNo">168</span> // intentionally not reference the class object directly, so here we will not load the class, to<a name="line.168"></a>
<span class="sourceLineNo">169</span> // make sure that in isFatalConnectionException, we can use initialized = false when calling<a name="line.169"></a>
<span class="sourceLineNo">170</span> // Class.forName<a name="line.170"></a>
<span class="sourceLineNo">171</span> ExceptionResponse resp = ExceptionResponse.newBuilder()<a name="line.171"></a>
<span class="sourceLineNo">172</span> .setExceptionClassName("org.apache.hadoop.hbase.ipc.DummyFatalConnectionException").build();<a name="line.172"></a>
<span class="sourceLineNo">173</span> assertTrue(IPCUtil.isFatalConnectionException(resp));<a name="line.173"></a>
<span class="sourceLineNo">174</span><a name="line.174"></a>
<span class="sourceLineNo">175</span> resp = ExceptionResponse.newBuilder()<a name="line.175"></a>
<span class="sourceLineNo">176</span> .setExceptionClassName("org.apache.hadoop.hbase.ipc.DummyException").build();<a name="line.176"></a>
<span class="sourceLineNo">177</span> assertFalse(IPCUtil.isFatalConnectionException(resp));<a name="line.177"></a>
<span class="sourceLineNo">178</span><a name="line.178"></a>
<span class="sourceLineNo">179</span> // class not found<a name="line.179"></a>
<span class="sourceLineNo">180</span> resp = ExceptionResponse.newBuilder()<a name="line.180"></a>
<span class="sourceLineNo">181</span> .setExceptionClassName("org.apache.hadoop.hbase.ipc.WhatEver").build();<a name="line.181"></a>
<span class="sourceLineNo">182</span> assertFalse(IPCUtil.isFatalConnectionException(resp));<a name="line.182"></a>
<span class="sourceLineNo">183</span> }<a name="line.183"></a>
<span class="sourceLineNo">184</span>}<a name="line.184"></a>
</pre>
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