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Posted to dev@hc.apache.org by bu...@apache.org on 2005/10/19 12:56:46 UTC
DO NOT REPLY [Bug 37161] New: -
MultiThreadedHttpConnectionManager unreliable and slow
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http://issues.apache.org/bugzilla/show_bug.cgi?id=37161
Summary: MultiThreadedHttpConnectionManager unreliable and slow
Product: HttpClient
Version: 3.0 RC4
Platform: Other
OS/Version: Windows XP
Status: NEW
Severity: critical
Priority: P2
Component: Commons HttpClient
AssignedTo: httpclient-dev@jakarta.apache.org
ReportedBy: aioaneid@gmail.com
With only 100 threads connecting to a tomcat on localhost, and
maxConnectionPerHost=5000, maTotalxConnections=6000 it performs about 900
requests per second and after some time I get ConnectionPoolTimeoutException.
And yes I do call httpClient.releaseConnection in a finally block. With the
same configuration 100 threads each one with its own HttpClient and
SimpleHttpConnectionManager performs about 1200 requests/second and works
reliably. Moreover, cpu usage with the multithreaded manager is low, while
with the simple manager it is 97%. I monitors the application with jconsole
and it seems that most threads wait for some time in the location indicated
below:
Name: Thread-10
State: TIMED_WAITING on
org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$ConnectionPool
@1922f46
Total blocked: 14 Total waited: 514
Stack trace:
java.lang.Object.wait(Native Method)
org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.doGetConnectio
n(MultiThreadedHttpConnectionManager.java:509)
org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.getConnectionW
ithTimeout(MultiThreadedHttpConnectionManager.java:394)
org.apache.commons.httpclient.HttpMethodDirector.executeMethod
(HttpMethodDirector.java:152)
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:396)
org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:324)
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