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| <div class="subTitle">org.apache.hadoop.hbase.http</div> |
| <h2 title="Class ProfileServlet" class="title">Class ProfileServlet</h2> |
| </div> |
| <div class="contentContainer"> |
| <ul class="inheritance"> |
| <li><a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Object.html?is-external=true" title="class or interface in java.lang">java.lang.Object</a></li> |
| <li> |
| <ul class="inheritance"> |
| <li>javax.servlet.GenericServlet</li> |
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| <li>javax.servlet.http.HttpServlet</li> |
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| <li>org.apache.hadoop.hbase.http.ProfileServlet</li> |
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| <pre>@InterfaceAudience.Private |
| public class <a href="../../../../../src-html/org/apache/hadoop/hbase/http/ProfileServlet.html#line.87">ProfileServlet</a> |
| extends javax.servlet.http.HttpServlet</pre> |
| <div class="block">Servlet that runs async-profiler as web-endpoint. |
| Following options from async-profiler can be specified as query paramater. |
| // -e event profiling event: cpu|alloc|lock|cache-misses etc. |
| // -d duration run profiling for 'duration' seconds (integer) |
| // -i interval sampling interval in nanoseconds (long) |
| // -j jstackdepth maximum Java stack depth (integer) |
| // -b bufsize frame buffer size (long) |
| // -t profile different threads separately |
| // -s simple class names instead of FQN |
| // -o fmt[,fmt...] output format: summary|traces|flat|collapsed|svg|tree|jfr|html |
| // --width px SVG width pixels (integer) |
| // --height px SVG frame height pixels (integer) |
| // --minwidth px skip frames smaller than px (double) |
| // --reverse generate stack-reversed FlameGraph / Call tree |
| Example: |
| - To collect 30 second CPU profile of current process (returns FlameGraph svg) |
| curl "http://localhost:10002/prof" |
| - To collect 1 minute CPU profile of current process and output in tree format (html) |
| curl "http://localhost:10002/prof?output=tree&duration=60" |
| - To collect 30 second heap allocation profile of current process (returns FlameGraph svg) |
| curl "http://localhost:10002/prof?event=alloc" |
| - To collect lock contention profile of current process (returns FlameGraph svg) |
| curl "http://localhost:10002/prof?event=lock" |
| Following event types are supported (default is 'cpu') (NOTE: not all OS'es support all events) |
| // Perf events: |
| // cpu |
| // page-faults |
| // context-switches |
| // cycles |
| // instructions |
| // cache-references |
| // cache-misses |
| // branches |
| // branch-misses |
| // bus-cycles |
| // L1-dcache-load-misses |
| // LLC-load-misses |
| // dTLB-load-misses |
| // mem:breakpoint |
| // trace:tracepoint |
| // Java events: |
| // alloc |
| // lock</div> |
| <dl> |
| <dt><span class="seeLabel">See Also:</span></dt> |
| <dd><a href="../../../../../serialized-form.html#org.apache.hadoop.hbase.http.ProfileServlet">Serialized Form</a></dd> |
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| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Class and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.DisabledServlet.html" title="class in org.apache.hadoop.hbase.http">ProfileServlet.DisabledServlet</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.Event.html" title="enum in org.apache.hadoop.hbase.http">ProfileServlet.Event</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static class </code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.Output.html" title="enum in org.apache.hadoop.hbase.http">ProfileServlet.Output</a></span></code> </td> |
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| <!-- =========== FIELD SUMMARY =========== --> |
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| <caption><span>Fields</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Field and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#ACCESS_CONTROL_ALLOW_METHODS">ACCESS_CONTROL_ALLOW_METHODS</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#ACCESS_CONTROL_ALLOW_ORIGIN">ACCESS_CONTROL_ALLOW_ORIGIN</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#ALLOWED_METHODS">ALLOWED_METHODS</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#ASYNC_PROFILER_HOME_ENV">ASYNC_PROFILER_HOME_ENV</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#ASYNC_PROFILER_HOME_SYSTEM_PROPERTY">ASYNC_PROFILER_HOME_SYSTEM_PROPERTY</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#asyncProfilerHome">asyncProfilerHome</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#CONTENT_TYPE_TEXT">CONTENT_TYPE_TEXT</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static int</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#DEFAULT_DURATION_SECONDS">DEFAULT_DURATION_SECONDS</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/atomic/AtomicInteger.html?is-external=true" title="class or interface in java.util.concurrent.atomic">AtomicInteger</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#ID_GEN">ID_GEN</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static org.slf4j.Logger</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#LOG">LOG</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#OUTPUT_DIR">OUTPUT_DIR</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#pid">pid</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Process.html?is-external=true" title="class or interface in java.lang">Process</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#process">process</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#PROFILER_SCRIPT">PROFILER_SCRIPT</a></span></code> </td> |
| </tr> |
| <tr class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/locks/Lock.html?is-external=true" title="class or interface in java.util.concurrent.locks">Lock</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#profilerLock">profilerLock</a></span></code> </td> |
| </tr> |
| <tr class="rowColor"> |
| <td class="colFirst"><code>private static long</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#serialVersionUID">serialVersionUID</a></span></code> </td> |
| </tr> |
| </table> |
| </li> |
| </ul> |
| <!-- ======== CONSTRUCTOR SUMMARY ======== --> |
| <ul class="blockList"> |
| <li class="blockList"><a name="constructor.summary"> |
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| </a> |
| <h3>Constructor Summary</h3> |
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| <caption><span>Constructors</span><span class="tabEnd"> </span></caption> |
| <tr> |
| <th class="colOne" scope="col">Constructor and Description</th> |
| </tr> |
| <tr class="altColor"> |
| <td class="colOne"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#ProfileServlet--">ProfileServlet</a></span>()</code> </td> |
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| <table class="memberSummary" border="0" cellpadding="3" cellspacing="0" summary="Method Summary table, listing methods, and an explanation"> |
| <caption><span id="t0" class="activeTableTab"><span>All Methods</span><span class="tabEnd"> </span></span><span id="t1" class="tableTab"><span><a href="javascript:show(1);">Static Methods</a></span><span class="tabEnd"> </span></span><span id="t2" class="tableTab"><span><a href="javascript:show(2);">Instance Methods</a></span><span class="tabEnd"> </span></span><span id="t4" class="tableTab"><span><a href="javascript:show(8);">Concrete Methods</a></span><span class="tabEnd"> </span></span></caption> |
| <tr> |
| <th class="colFirst" scope="col">Modifier and Type</th> |
| <th class="colLast" scope="col">Method and Description</th> |
| </tr> |
| <tr id="i0" class="altColor"> |
| <td class="colFirst"><code>protected void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#doGet-javax.servlet.http.HttpServletRequest-javax.servlet.http.HttpServletResponse-">doGet</a></span>(javax.servlet.http.HttpServletRequest req, |
| javax.servlet.http.HttpServletResponse resp)</code> </td> |
| </tr> |
| <tr id="i1" class="rowColor"> |
| <td class="colFirst"><code>(package private) static <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#getAsyncProfilerHome--">getAsyncProfilerHome</a></span>()</code> </td> |
| </tr> |
| <tr id="i2" class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.Event.html" title="enum in org.apache.hadoop.hbase.http">ProfileServlet.Event</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#getEvent-javax.servlet.http.HttpServletRequest-">getEvent</a></span>(javax.servlet.http.HttpServletRequest req)</code> </td> |
| </tr> |
| <tr id="i3" class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#getInteger-javax.servlet.http.HttpServletRequest-java.lang.String-java.lang.Integer-">getInteger</a></span>(javax.servlet.http.HttpServletRequest req, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> param, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Integer.html?is-external=true" title="class or interface in java.lang">Integer</a> defaultValue)</code> </td> |
| </tr> |
| <tr id="i4" class="altColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Long.html?is-external=true" title="class or interface in java.lang">Long</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#getLong-javax.servlet.http.HttpServletRequest-java.lang.String-">getLong</a></span>(javax.servlet.http.HttpServletRequest req, |
| <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/String.html?is-external=true" title="class or interface in java.lang">String</a> param)</code> </td> |
| </tr> |
| <tr id="i5" class="rowColor"> |
| <td class="colFirst"><code>private <a href="https://docs.oracle.com/javase/8/docs/api/java/lang/Double.html?is-external=true" title="class or interface in java.lang">Double</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#getMinWidth-javax.servlet.http.HttpServletRequest-">getMinWidth</a></span>(javax.servlet.http.HttpServletRequest req)</code> </td> |
| </tr> |
| <tr id="i6" class="altColor"> |
| <td class="colFirst"><code>private <a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.Output.html" title="enum in org.apache.hadoop.hbase.http">ProfileServlet.Output</a></code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#getOutput-javax.servlet.http.HttpServletRequest-">getOutput</a></span>(javax.servlet.http.HttpServletRequest req)</code> </td> |
| </tr> |
| <tr id="i7" class="rowColor"> |
| <td class="colFirst"><code>(package private) static void</code></td> |
| <td class="colLast"><code><span class="memberNameLink"><a href="../../../../../org/apache/hadoop/hbase/http/ProfileServlet.html#setResponseHeader-javax.servlet.http.HttpServletResponse-">setResponseHeader</a></span>(javax.servlet.http.HttpServletResponse response)</code> </td> |
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| </a> |
| <h3>Methods inherited from class javax.servlet.http.HttpServlet</h3> |
| <code>doDelete, doHead, doOptions, doPost, doPut, doTrace, getLastModified, service, service</code></li> |
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| </a> |
| <h3>Methods inherited from class javax.servlet.GenericServlet</h3> |
| <code>destroy, getInitParameter, getInitParameterNames, getServletConfig, getServletContext, getServletInfo, getServletName, init, init, log, log</code></li> |
| </ul> |
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