JMeter HTTP请求挂起（可能在过载的网络上）

Question

我使用JMeter测试来检查我们的应用程序是否正在运行。测试是从Jenkins通过ANT运行的。

卡住进程的线程转储为：

   [jmeter] "User test 1-1" prio=10 tid=0x00007fd56c43f000 nid=0x2797 runnable [0x00007fd5704e2000]
   [jmeter]    java.lang.Thread.State: RUNNABLE
   [jmeter]     at java.net.SocketInputStream.socketRead0(Native Method)
   [jmeter]     at java.net.SocketInputStream.read(SocketInputStream.java:146)
   [jmeter]     at org.apache.http.impl.io.AbstractSessionInputBuffer.read(AbstractSessionInputBuffer.java:204)
   [jmeter]     at org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:177)
   [jmeter]     at org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:201)
   [jmeter]     at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:155)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.readResponse(HTTPSamplerBase.java:1649)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPAbstractImpl.readResponse(HTTPAbstractImpl.java:235)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:300)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:62)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.followRedirects(HTTPSamplerBase.java:1410)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.resultProcessing(HTTPSamplerBase.java:1481)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPAbstractImpl.resultProcessing(HTTPAbstractImpl.java:251)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:358)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:62)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1088)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1077)
   [jmeter]     at org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:428)
   [jmeter]     at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:256)
   [jmeter]     at java.lang.Thread.run(Thread.java:679)

从第二个测试（这个测试www.google.com的可达性）：

   [jmeter] "www.google.com 1-1" prio=10 tid=0x0000000000d32000 nid=0x27e8 runnable [0x00007fb9fea54000]
   [jmeter]    java.lang.Thread.State: RUNNABLE
   [jmeter]     at java.net.SocketInputStream.socketRead0(Native Method)
   [jmeter]     at java.net.SocketInputStream.read(SocketInputStream.java:146)
   [jmeter]     at org.apache.http.impl.io.AbstractSessionInputBuffer.read(AbstractSessionInputBuffer.java:204)
   [jmeter]     at org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:177)
   [jmeter]     at org.apache.http.impl.io.ChunkedInputStream.read(ChunkedInputStream.java:201)
   [jmeter]     at org.apache.http.conn.EofSensorInputStream.read(EofSensorInputStream.java:155)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.readResponse(HTTPSamplerBase.java:1649)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPAbstractImpl.readResponse(HTTPAbstractImpl.java:235)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:300)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:62)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1088)
   [jmeter]     at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1077)
   [jmeter]     at org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:428)
   [jmeter]     at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:256)
   [jmeter]     at java.lang.Thread.run(Thread.java:679)

我使用默认值的HTTP请求采样器：

    <HTTPSamplerProxy guiclass="HttpTestSampleGui" testclass="HTTPSamplerProxy" testname="www.google.cz" enabled="true">
      <elementProp name="HTTPsampler.Arguments" elementType="Arguments" guiclass="HTTPArgumentsPanel" testclass="Arguments" enabled="true">
        <collectionProp name="Arguments.arguments"/>
      </elementProp>
      <stringProp name="HTTPSampler.domain">www.google.cz</stringProp>
      <stringProp name="HTTPSampler.port"></stringProp>
      <stringProp name="HTTPSampler.connect_timeout"></stringProp>
      <stringProp name="HTTPSampler.response_timeout"></stringProp>
      <stringProp name="HTTPSampler.protocol">http</stringProp>
      <stringProp name="HTTPSampler.contentEncoding"></stringProp>
      <stringProp name="HTTPSampler.path"></stringProp>
      <stringProp name="HTTPSampler.method">GET</stringProp>
      <boolProp name="HTTPSampler.follow_redirects">true</boolProp>
      <boolProp name="HTTPSampler.auto_redirects">false</boolProp>
      <boolProp name="HTTPSampler.use_keepalive">true</boolProp>
      <boolProp name="HTTPSampler.DO_MULTIPART_POST">false</boolProp>
      <boolProp name="HTTPSampler.monitor">false</boolProp>
      <stringProp name="HTTPSampler.embedded_url_re"></stringProp>
    </HTTPSamplerProxy>

没有设置超时，但我尝试默认超时为240s-当我尝试从无响应站点获取时，一切正常，240s后JMeter无法完成任务（如预期）。

JMeter版本是2.9运行在linux机器上。

当我问系统管理员关于网络的问题时，他说网络可能超载了。我无法重现这个bug，因为它发生得太少（我也没有TCP转储）。

我想有两种可能的解决办法：

• 添加一个超时到JMeter来杀死有问题的线程-我不确定如何，有什么提示吗？
• 添加超时到Jenkins-使用构建超时插件

但我想解决问题，而不是采取变通办法。你有什么建议吗？

线程仍然被卡住，可以从中提取一些有用的信息吗？我刚刚使用了kill-3$PID来获得线程转储。




Answer 1

您可以在Jmeter属性文件中设置默认超时设置，请参见以下内容：（Jmeter版本2.6.11）

# Following properties apply to both Commons and Apache HttpClient

# set the socket timeout (or use the parameter http.socket.timeout)
# Value is in milliseconds
httpclient.timeout=60000
# 0 == no timeout

Answer 2

为什么不添加响应超时到HTTP采样器：

• http://jmeter.apache.org/usermanual/component_reference.html#HTTP_Request

响应超时：等待响应的毫秒数。

如果您使用HTTPClient4，那么您可能有以下选项，将其添加到httpclient。参数：

• http.connection.stalecheck

看见http://hc.apache.org/httpclient-legacy/preference-api.html#HTTP_connection_parameters:

确定是否使用过期连接检查。禁用陈旧连接检查可能会导致轻微的性能改善，但在服务器端通过已关闭的连接执行请求时，可能会出现I/O错误。