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Posted to dev@tomcat.apache.org by bu...@apache.org on 2009/05/01 13:09:34 UTC
DO NOT REPLY [Bug 47133] New: Reloading web application causes CPU
usage to spike when using AIO
https://issues.apache.org/bugzilla/show_bug.cgi?id=47133
Summary: Reloading web application causes CPU usage to spike
when using AIO
Product: Tomcat 6
Version: 6.0.18
Platform: PC
OS/Version: Windows Vista
Status: NEW
Severity: normal
Priority: P2
Component: Connectors
AssignedTo: dev@tomcat.apache.org
ReportedBy: kenneth.gendron@gmail.com
Created an attachment (id=23568)
--> (https://issues.apache.org/bugzilla/attachment.cgi?id=23568)
Web Application
When using Tomcat 6 with Advanced IO the CPU usage will go to 100% under the
following sequence of events:
1) Start Tomcat
2) "Reload" AIO-Enabled Web Application from Tomcat Web Application Manager
page
3) Open Web Application
4) Terminate Web Application in middle of a request (i.e. Close Browser or
issue an XMLHttpRequest.abort()).
Once this is done the CPU will jump dramatically.
I have attached a NetBeans project that shows this phenomenon. When viewing
the index.jsp file, just click the "End" button.
It should be noted that CPU usage remains normal if the web application is
first undeployed then deployed again. CPU usage will only spike if the web
application is explicitly reloaded.
Thanks,
Ken
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DO NOT REPLY [Bug 47133] Reloading web application causes CPU usage
to spike when using AIO
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=47133
Mark Thomas <ma...@apache.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution| |WORKSFORME
--- Comment #2 from Mark Thomas <ma...@apache.org> 2009-05-02 17:36:37 PST ---
Tested with 6.0.18, 6.0.x and trunk with native/APR (1.1.16) and NIO with JDK
1.6.0_13_x64 on WinXP 64-bit and I can't reproduce this.
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DO NOT REPLY [Bug 47133] Reloading web application causes CPU usage
to spike when using AIO
Posted by bu...@apache.org.
https://issues.apache.org/bugzilla/show_bug.cgi?id=47133
--- Comment #1 from Kenneth Gendron <ke...@gmail.com> 2009-05-01 04:39:37 PST ---
After further investigation CPU usage will spike if "Stop", "Reload" or
"Undeploy" is used from the manager while an active AIO request is being
processed by the container and that request gets terminated. Even if the web
application were to be redeployed it will not prevent CPU from spiking.
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