Hi Udara, Attached is an example of an autoscaling policy which is causing the error message. Considering that this property or the absence of this property doesn’t seem to cause any harm or effect but causes ERROR messages in the log wouldn’t it be better to change the level to a WARNING or even suppress it ?
Thanks Martin From: Udara Liyanage [mailto:ud...@wso2.com] Sent: Thursday, July 16, 2015 9:25 PM To: dev Subject: Re: Can some one share some insight on this error (Request in flight threshold is Zero) ? Hi, Stratos auto scaling policy uses three parameters to be scaled. One is Request in flight count of the load balancer, that is number is of requests to be served. In another way it is equal to no of requests received minus no of requests served. If you are using a load balancer this property is useful. However if you did not specify this property, autoscaling will not consider this property. However this is not a critical effect to the function of Stratos since normal functionality works fine without this. On Fri, Jul 17, 2015 at 9:46 AM, Udara Liyanage <ud...@wso2.com<mailto:ud...@wso2.com>> wrote: Hi Feng, Welcome to Stratos community. Could you please share the autoscaling policy you deployed. It seems requestsInFlight value of the auto scaling policy is zero or not specified. On Fri, Jul 17, 2015 at 1:12 AM, Feng Zhou (fezhou2) <fezh...@cisco.com<mailto:fezh...@cisco.com>> wrote: Hello all, My name is Feng, I work for Cisco. Nice to be a new member of the stratos dev mailing list! Want to get some suggestion on a repeated error message we are seeing in stratos logs, the log look like this: TID: [0] [STRATOS] [2015-06-25 09:48:08,424] ERROR {org.apache.stratos.autoscaler.rule.RuleTasksDelegator} - Request in flight threshold is Zero TID: [0] [STRATOS] [2015-06-25 09:49:08,424] ERROR {org.apache.stratos.autoscaler.rule.RuleTasksDelegator} - Request in flight threshold is Zero TID: [0] [STRATOS] [2015-06-25 09:50:08,424] ERROR {org.apache.stratos.autoscaler.rule.RuleTasksDelegator} - Request in flight threshold is Zero It comes up quite often, and from what we observe it seems not do much harm… so can someone explain what is this error and is it really an error? Also I did a little bit of digging inside the code, the following code piece looks might be doing the logging: components/org.apache.stratos.autoscaler/src/main/java/org/apache/stratos/autoscaler/rule/RuleTasksDelegator.java publicint getNumberOfInstancesRequiredBasedOnRif(float rifPredictedValue, float rifThreshold) { if (rifThreshold != 0) { float requiredNumberOfInstances = rifPredictedValue / rifThreshold; return (int) Math.ceil(requiredNumberOfInstances); } else { log.error("Request in flight threshold is Zero"); return0; } } Question is, is it normal for rifThreshold to be 0? Should we fix this condition, or if it is not so critical, would it be proper to lower this error to like warning? Thank! -Feng Zhou -- Udara Liyanage Software Engineer WSO2, Inc.: http://wso2.com<http://wso2.com/> lean. enterprise. middleware web: http://udaraliyanage.wordpress.com phone: +94 71 443 6897 -- Udara Liyanage Software Engineer WSO2, Inc.: http://wso2.com<http://wso2.com/> lean. enterprise. middleware web: http://udaraliyanage.wordpress.com phone: +94 71 443 6897
economy-policy.json
Description: economy-policy.json
