Hey Ken, I'm having the same issue as you, did you find a reasonable resolution?
It surprises me that this isn't talked about more as it happens with just a basic Grails app as you mentioned. It makes me think there's something trivial I need to do to get it to work. Best of luck, Gav On Mar 8, 12:30 am, Ken <[email protected]> wrote: > Actually my app is written in Groovy onGrails. It is supposed to be > supported by App Engine and seems to work OK, with a few warts and > this problem. Unfortunately it means I probably don't have as much > control over application start up times as I might with another > framework. > > Is there any way to increase the amount of time my app is allowed to > spend spinning up? If not, then app engine really doesn't support > Groovy onGrails. We should probably note this stuff somewhere. > > On Mar 7, 6:08 pm, John Patterson <[email protected]> wrote: > > > > > The Jetty server is not used again after an error so another one has > > to be spun-up for you next request. The only thing you can do about > > it is tackle the HDEEs which is not always easy. It sounds like they > > might be due to long start-up time? > > > If so there are a number of tactics you can use to reduce this: > > > Use lazy initialization as much as possible. > > Split your app into a user facing version and an admin version that > > share the same datastore > > If you use Guice try using the non-AOP version that does not enhance > > classes at startup > > Spring - not sure but others mentioned turning off classpath scanning > > Try reducing external jar dependencies - not sure how much affect > > loading these has > > > If the cause of the HDEEs is that your requests take a long time then > > you'll need to reduce processing time > > > Try using the Deferred class: > > >http://groups.google.com/group/google-appengine-java/browse_thread/th... > > > On 8 Mar 2010, at 05:37, Ken wrote: > > > > I am getting HardDeadlineExceededErrors. What do you mean that the > > > instance will be disposed? What can I do about it? > > > > Thank you. > > > > On Mar 7, 5:18 pm, John Patterson <[email protected]> wrote: > > >> If there are errors like HardDeadlineExceededError then the server > > >> instance will be disposed. Could this be the problem? > > > >> On 8 Mar 2010, at 05:09, Ken wrote: > > > >>> I was just looking in the logs after making numerous requests to my > > >>> application. Something is seriously wrong. I'm even having high > > >>> CPU > > >>> on static files. In one request it took 45 seconds of CPU to return > > >>> the favicon.ico file. I guess this is really related to starting a > > >>> server instance, but if that's true then the server is going down > > >>> after only a few seconds of use. It is starting the server > > >>> handling a > > >>> request and a few seconds later dropping the server. It isn't even > > >>> staying up a minute. > > > >>> On Mar 7, 3:13 pm, Ken <[email protected]> wrote: > > >>>> I have a very simple Groovy onGrailsapplication installed that > > >>>> uses > > >>>> only a single table. The application is really just the scaffolded > > >>>> edits on this table with very few modifications to make it work. > > >>>> So > > >>>> it doesn't really do anything. > > > >>>> About one in five clicks result in an error. The exception is a > > >>>> Hard > > >>>> Deadline Exceeded and there is a warning about the CPU limit as > > >>>> well. > > >>>> Randomly a request will take around 30 seconds of CPU for no > > >>>> reason. > > >>>> There is no change in the code. There is no change to the data. > > >>>> The > > >>>> exact same request will return with essentially no latency and then > > >>>> it > > >>>> will take 30 seconds of CPU. > > > >>>> I thought this might be some kind of weirdness withGrails, but > > >>>> there > > >>>> are several issues listed that seem to be related to same issue: > > > >>>>http://code.google.com/p/googleappengine/issues/detail?id=2621http:// > > >>>> ... > > >>>> ?id=2840http://code.google.com/p/googleappengine/issues/detail?id=2691http:// > > >>>> ... > > >>>> ?id=2837http://code.google.com/p/googleappengine/issues/detail?id=2846 > > > >>>> I've stared them all because they all are likely related to the > > >>>> same > > >>>> problem I'm having. > > > >>>> I was hoping that someone here knew what was going on and might be > > >>>> able to help me resolve it. In one of the messages above someone > > >>>> mentions moving an application to another "shard" to solve the > > >>>> problem. What does this mean? Is it really a potential solution? > > > >>>> Thank you. > > > >>> -- > > >>> You received this message because you are subscribed to the Google > > >>> Groups "Google App Engine for Java" group. > > >>> To post to this group, send email to > > >>> [email protected] > > >>> . > > >>> To unsubscribe from this group, send email to > > >>> [email protected] > > >>> . > > >>> For more options, visit this group > > >>> athttp://groups.google.com/group/google-appengine-java?hl=en > > >>> . > > > > -- > > > You received this message because you are subscribed to the Google > > > Groups "Google App Engine for Java" group. > > > To post to this group, send email to > > > [email protected] > > > . > > > To unsubscribe from this group, send email to > > > [email protected] > > > . > > > For more options, visit this group > > > athttp://groups.google.com/group/google-appengine-java?hl=en > > > . -- You received this message because you are subscribed to the Google Groups "Google App Engine for Java" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine-java?hl=en.
