https://bugzilla.novell.com/show_bug.cgi?id=652109
https://bugzilla.novell.com/show_bug.cgi?id=652109#c0 Summary: WebService consumes all CPU over time Classification: Mono Product: Mono: Runtime Version: 2.6.x Platform: x86 OS/Version: Other Status: NEW Severity: Major Priority: P5 - None Component: misc AssignedTo: [email protected] ReportedBy: [email protected] QAContact: [email protected] Found By: --- Blocker: --- Created an attachment (id=399010) --> (http://bugzilla.novell.com/attachment.cgi?id=399010) An strace pulled during the time of the error. User-Agent: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; WOW64; Trident/4.0; SLCC2; .NET CLR 2.0.50727; .NET CLR 3.5.30729; .NET CLR 3.0.30729; OfficeLiveConnector.1.5; OfficeLivePatch.1.3; .NET4.0C) The operating system is Centos 5.4 running Apache 2.2.3-43.e15.centos under mono 2.6.4 (tarball Jul 20 2010). After a period of 24-72 hours of running mod mono, the process will consume all available cores on the system regardless of usage. The average load is around 800 requests a second to a webservice. During testing, the webservice was simplified to contain a thread sleep of 50 millisconds and return an empty generic list as follows: [WebMethod] public List<MyObj> GetValues() { Thread.Sleep(50); return new List<MyObj>(); } Removing the Thread.Sleep appears to allow the service to run for a period of over a week but eventually top will indicate mono consuming most, if not all, cores on the system. Note: Recycling of mono is not configured for the site and there is no cron job recycling apache/mono nightly. Hardware Information for test server: CPU: Intel(R) Xeon(R) CPU X5680 @ 3.33GHz (24 core) Memory: 16GB <<Strace during failure attached>> Reproducible: Always Steps to Reproduce: 1. Simulate web service requests at a rate of 800/sec to the service as described above. 2. Allow to run for a period 72 hours. Actual Results: Top indicates cpu usage equal to 90 percent+ of the overall processing power. Expected Results: No unexplained increase in CPU. -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are the QA contact for the bug. You are the assignee for the bug. _______________________________________________ mono-bugs maillist - [email protected] http://lists.ximian.com/mailman/listinfo/mono-bugs
