I figured out what was happening. I was calling my MPS through a load balancer and the load balancer had an idle timeout set to 60 seconds. It was returning a gateway timeout response but JMeter showed the exception above so it wasn't obvious. I increased the timeout on the lb and no longer got these exceptions.
Why do I get "Unexpected end of file from server" when the MPS is under a heavy load?
39 次查看(过去 30 天)
显示 更早的评论
I get the following exception when stress-testing my MPS with JMeter:
java.net.SocketException: Unexpected end of file from server
at sun.reflect.GeneratedConstructorAccessor82.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at java.lang.reflect.Constructor.newInstance(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection$10.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at sun.net.www.protocol.http.HttpURLConnection.getChainedException(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at java.net.HttpURLConnection.getResponseCode(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
at org.apache.jmeter.protocol.http.sampler.HTTPJavaImpl.readResponse(HTTPJavaImpl.java:260)
at org.apache.jmeter.protocol.http.sampler.HTTPJavaImpl.sample(HTTPJavaImpl.java:513)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerProxy.sample(HTTPSamplerProxy.java:74)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1146)
at org.apache.jmeter.protocol.http.sampler.HTTPSamplerBase.sample(HTTPSamplerBase.java:1135)
at org.apache.jmeter.threads.JMeterThread.executeSamplePackage(JMeterThread.java:465)
at org.apache.jmeter.threads.JMeterThread.processSampler(JMeterThread.java:410)
at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:241)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketException: Unexpected end of file from server
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTPHeader(Unknown Source)
at sun.net.www.http.HttpClient.parseHTTP(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
at sun.net.www.protocol.http.HttpURLConnection.getHeaderField(Unknown Source)
at java.net.URLConnection.getHeaderFieldLong(Unknown Source)
at java.net.URLConnection.getContentLengthLong(Unknown Source)
at java.net.URLConnection.getContentLength(Unknown Source)
at sun.net.www.protocol.https.HttpsURLConnectionImpl.getContentLength(Unknown Source)
at org.apache.jmeter.protocol.http.sampler.HTTPJavaImpl.readResponse(HTTPJavaImpl.java:226)
... 8 more
Is this simply because MPS cannot handle that many concurrent requests? Is there a limit to the number of concurrent requests that can be handled by MPS? If so, what is that limit?
It seems like MPS might queue up requests somehow. If that's true is this behavior documented anywhere? I would like to know the limit to the queue and if there are any timeouts for requests sitting in the queue.
0 个评论
采纳的回答
更多回答(1 个)
Ankita Nargundkar
2017-4-27
To begin with there is no limit on the number of requests MPS can handle. The number of requests that are executed concurrently depends on the value you set for 'numWorkers'. Here is the link to show how you can set number of workers.
All the remaining requests are redirected to the queue. There is also no limit on the number of requests that can be in the queue. However there is a timeout on the requests sitting in the queue. You can probably set the timeout value as mentioned in this link
0 个评论
另请参阅
类别
在 Help Center 和 File Exchange 中查找有关 Installation 的更多信息
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!