I've been running some stress tests on JMeter using HTTPClient and
Java HTTP. [Mainly the idea is to try and find synch etc problems in
JMeter.]
Every so often, the HTTPClient test reports SocketExceptions - mostly
Connection reset, but sometimes Invalid argument (about 15% of the
errors).
The percentage of Socket errors is quite low - 0.5% or less - however
I don't see any errors at all with the Java implementation.
This is running on a 4 CPU Alpha, Java 1.4.2, Apache httpd 150
clients, JMeter 140 threads, single GET per thread, looped 1000 times.
The same errors happen, but less frequently, with fewer JMeter threads.
It's not a show-stopper, but I would be interested to know if there is
a known cause for this difference in behaviour?
Sample stack traces (" at " has been removed):
java.net.SocketException: Connection reset
java.net.SocketInputStream.read(SocketInputStream.java:168)
java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
java.io.BufferedInputStream.read(BufferedInputStream.java:201)
org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78)
org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106)
org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116)
org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1969)
org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1727)
org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1090)
org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
and
java.net.SocketException: invalid argument
java.net.SocketInputStream.socketRead0(Native Method)
java.net.SocketInputStream.read(SocketInputStream.java:147)
java.io.BufferedInputStream.fill(BufferedInputStream.java:183)
java.io.BufferedInputStream.read(BufferedInputStream.java:201)
org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78)
org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106)
org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116)
org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1969)
org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1727)
org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1090)
org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
S///
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