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From Daniel Pub <dca....@gmail.com>
Subject Re: HTTP Sampler + Javascript causes lock contention
Date Fri, 15 Aug 2014 20:56:30 GMT
Hi Jeff

No, we are using a function to get the timestamp in milis. From what I
could see there's no built in function for that. The time function seems to
only accept some patterns and none is the time in millis.

Thanks


2014-08-15 16:44 GMT-03:00 Jeff Ohrstrom <johrstrom@hotmail.com>:

> Yes unfortunately it does block on JavaScript. I'm not sure why that
> approach was taken but there are workarounds. Are you by chance using
> the javascript encode function?  They've given a JMeter Encode function
> in 2.10 and up.
>
> My suggestion is avoid JavaScript and use a JSR223 Pre (or Post)
> processor with Groovy and the appropriate cache size if you can't find a
> JMeter built in function that's appropriate.
>
>
> On Fri, 2014-08-15 at 12:10 -0300, Daniel Pub wrote:
> > Hi all,
> >
> > During a load teste we've noticed that JMeter was presenting a response
> > time much bigger than the tested component. Taking some thread dumps we
> > found that on a total of 200 threads, 170 were locked at some javascript
> > object.
> >
> > This was due to the usage of a JavaScript function in the body of the
> HTTP
> > payload. Do we really have to use a shared object for javascript and then
> > lock it causing this contention?
> >
> > Bellow, my thread dump:
> >
> >
> > "Thread XXXX 1-200" prio=10 tid=0x00002aaab105e800 nid=0x34ec waiting for
> > monitor entry [0x000000005a3ff000]
> >    java.lang.Thread.State: BLOCKED (on object monitor)
> > at org.apache.jmeter.functions.JavaScript.execute(JavaScript.java:65)
> > - waiting to lock <0x000000070158e538> (a
> > org.apache.jmeter.functions.JavaScript)
> > at
> >
> org.apache.jmeter.engine.util.CompoundVariable.execute(CompoundVariable.java:146)
> > at
> >
> org.apache.jmeter.engine.util.CompoundVariable.execute(CompoundVariable.java:120)
> > at
> >
> org.apache.jmeter.testelement.property.FunctionProperty.getStringValue(FunctionProperty.java:101)
> > at
> >
> org.apache.jmeter.testelement.AbstractTestElement.getPropertyAsString(AbstractTestElement.java:274)
> > at org.apache.jmeter.config.Argument.getValue(Argument.java:146)
> > at
> >
> org.apache.jmeter.protocol.http.util.HTTPArgument.getEncodedValue(HTTPArgument.java:199)
> > at
> >
> org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sendEntityData(HTTPHC4Impl.java:1168)
> > at
> >
> org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.handleMethod(HTTPHC4Impl.java:422)
> > at
> >
> org.apache.jmeter.protocol.http.sampler.HTTPHC4Impl.sample(HTTPHC4Impl.java:296)
> > at
> >
> org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74)
> > at
> >
> org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1105)
> > at
> >
> org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1094)
> > at
> >
> org.apache.jmeter.threads.JMeterThread.process_sampler(JMeterThread.java:429)
> > at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:257)
> > at java.lang.Thread.run(Thread.java:745)
> >
> >
> > Thanks,
> > Daniel
>
>
>
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