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.测试从Jenkins通过ANT <jmeter>标签运行.问题是,JMeter不时会挂起(并且Jenkins执行器被阻止仍在运行).在两个月内(测试每10分钟进行一次)只发生了两次这样的挂起,但今天,两个并行测试同时被卡住(在5分钟内,不同的测试).我怀疑网络连接(它经常过载和不可靠),但我希望测试即使在这样的环境中也是可靠的.

卡住进程的线程转储是:

   [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)

从第二次测试(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HTTP Request带有默认值的Sampler:

    <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,但我试验了默认超时为240s - 当我尝试GET从非响应站点时,一切正常,在240s后JMeter失败了任务(如预期的那样).

JMeter版本在Linux机器上运行2.9.

当我问系统管理员关于网络时,他说这可能是超载的.我不能重现这个错误,因为它发生得如此稀疏(我也没有TCP转储).

我想两个可能的解决方法:

• 向JMeter添加超时以杀死有问题的线程 - 我不知道如何,任何提示？
• 使用Build-timout插件为Jenkins添加超时

但我想解决问题,而不是解决问题. 你有什么建议吗？

线程仍然卡住,可以从中提取一些有用的信息吗？我刚刚习惯kill -3 $PID了Thread dump.

Answer 1

为什么不直接向HTTP Sampler添加响应超时:

• 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,那么您可以使用以下选项,将其添加到httpclient.parameters:

• http.connection.stalecheck

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

确定是否使用陈旧连接检查.禁用过时连接检查可能会导致性能略有提高,但在通过服务器端已关闭的连接执行请求时,可能会出现I/O错误.