SocketExceptions under load

["Parham, Clinton" <cp...@biosignia.com>]

Hello,

 

I'm using JMeter 2.2 to perform load testing against a web application
running on Tomcat 5.5.16 on a Windows 2003 server. When I simulate 200
users all is well. When I jump up to about 300, I start seeing
SocketExceptions in JMeter as shown below - somewhere between 5% and 10%
of the requests fail this way. CPU utilization on the client and server
are fairly high during the test but not constantly above 90%.

 

I don't see any errors in the Tomcat logs (with default/standard
logging). I believe Tomcat is using tcnative-1.dll and the SSL connector
parameters shown below.

 

Has anyone seen this behavior before or know what I need to do to
avoid/troubleshoot the errors?

 

Thank you,

Umk

 

<Connector port="443" maxHttpHeaderSize="8192"

maxThreads="500" minSpareThreads="25" maxSpareThreads="75"

enableLookups="false" disableUploadTimeout="true"

acceptCount="150" scheme="https" secure="true"

SSLEngine="on" 

SSLCertificateFile="${catalina.home}/ssl/test.cer"

SSLCertificateKeyFile="${catalina.home}/ssl/test.key" />

 

Complete stack trace seen within JMeter:

java.net.SocketException: Connection reset at
java.net.SocketInputStream.read(SocketInputStream.java:168) at
com.sun.net.ssl.internal.ssl.InputRecord.a(DashoA12275) at
com.sun.net.ssl.internal.ssl.InputRecord.read(DashoA12275) at
com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA12275) at
com.sun.net.ssl.internal.ssl.SSLSocketImpl.a(DashoA12275) at
com.sun.net.ssl.internal.ssl.HandshakeOutStream.flush(DashoA12275) at
com.sun.net.ssl.internal.ssl.SunJSSE_ax.i(DashoA12275) at
com.sun.net.ssl.internal.ssl.SSLSocketImpl.k(DashoA12275) at
com.sun.net.ssl.internal.ssl.SSLSocketImpl.j(DashoA12275) at
com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(DashoA12275)
at sun.net.www.protocol.https.HttpsClient.afterConnect(DashoA12275) at
sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Da
shoA12275) at
com.sun.net.ssl.internal.www.protocol.https.HttpsURLConnectionOldImpl.co
nnect(DashoA12275) at
org.apache.jmeter.protocol.http.sampler.HTTPSampler.sample(HTTPSampler.j
ava:406) at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSampl
erBase.java:658) at
org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSampl
erBase.java:647) at
org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:247) at
java.lang.Thread.run(Thread.java:534)