Thanks for reporting this, Marcel! I've created a task for us to correct the behavior of our EL funnels: https://phabricator.wikimedia.org/T99276 Is the actual character limit of EL messages specified somewhere? -Dmitry On Fri, May 15, 2015 at 3:41 PM, Marcel Ruiz Forns < mforns(a)wikimedia.org&gt; wrote: > Hi Mobile, > > Analyzing EventLogging logs we percieved that a significant share of > MobileWikiAppSavedPages, MobileWikiAppArticleSuggestions and > MobileWikiAppShareAFact events are failing validation. > > *1) MobileWikiAppShareAFact: 1.5% not validating* > In this schema, the field "text" stores long fractions of text > sometimes. > This exceeds the size limitation of EL, specially when the text > contains special characters, like chinese, greek, etc. > > *2) MobileWikiAppArticleSuggestions: 1% not validating* > In this case, it's the field "readMoreList" that is sometimes very > long, > specially when it contains special characters. > This, again, exceeds the log size limit. > > *3) MobileWikiAppSavedPages: 1% not validating* > Some events do not contain the required field "appInstallID". > > In cases 1) and 2) the percentage is not big overall, but it can be > that for a given language, a lot of events are lost. > > EventLogging performance is not compromised by these validation > errors, but we are receiving monitoring alerts, and would like to maintain > the validation rate close to 100%. > > Is it possible for you to somehow reduce the size of the logs of 1) > and 2)? > If so, have in mind that the log size limit is 1k, and that the > highest priority for us would be 2). > > Thank you! > > Marcel > > _______________________________________________ > Mobile-l mailing list > Mobile-l(a)lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/mobile-l > >

wrote:

Dmitry, you're totally right, it was in the email, but it should have been in the wikis. I added some documentation on it here: https://wikitech.wikimedia.org/wiki/EventLogging#Log_size_limit Thanks! On Fri, May 15, 2015 at 10:00 PM, Dmitry Brant &lt;dbrant(a)wikimedia.org&gt; wrote: > [brain fart] it's in your email. :( Thanks! > > On Fri, May 15, 2015 at 3:59 PM, Dmitry Brant &lt;dbrant(a)wikimedia.org&gt; > wrote: > >> Thanks for reporting this, Marcel! >> I've created a task for us to correct the behavior of our EL funnels: >> https://phabricator.wikimedia.org/T99276 >> >> Is the actual character limit of EL messages specified somewhere? >> >> >> -Dmitry >> >> >> On Fri, May 15, 2015 at 3:41 PM, Marcel Ruiz Forns < >> mforns(a)wikimedia.org&gt; wrote: >> >>> Hi Mobile, >>> >>> Analyzing EventLogging logs we percieved that a significant share of >>> MobileWikiAppSavedPages, MobileWikiAppArticleSuggestions and >>> MobileWikiAppShareAFact events are failing validation. >>> >>> *1) MobileWikiAppShareAFact: 1.5% not validating* >>> In this schema, the field "text" stores long fractions of text >>> sometimes. >>> This exceeds the size limitation of EL, specially when the text >>> contains special characters, like chinese, greek, etc. >>> >>> *2) MobileWikiAppArticleSuggestions: 1% not validating* >>> In this case, it's the field "readMoreList" that is sometimes very >>> long, >>> specially when it contains special characters. >>> This, again, exceeds the log size limit. >>> >>> *3) MobileWikiAppSavedPages: 1% not validating* >>> Some events do not contain the required field "appInstallID". >>> >>> In cases 1) and 2) the percentage is not big overall, but it can be >>> that for a given language, a lot of events are lost. >>> >>> EventLogging performance is not compromised by these validation >>> errors, but we are receiving monitoring alerts, and would like to maintain >>> the validation rate close to 100%. >>> >>> Is it possible for you to somehow reduce the size of the logs of 1) >>> and 2)? >>> If so, have in mind that the log size limit is 1k, and that the >>> highest priority for us would be 2). >>> >>> Thank you! >>> >>> Marcel >>> >>> _______________________________________________ >>> Mobile-l mailing list >>> Mobile-l(a)lists.wikimedia.org >>> https://lists.wikimedia.org/mailman/listinfo/mobile-l >>> >>> >> > _______________________________________________ Mobile-l mailing list Mobile-l(a)lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/mobile-l

Marcel, do you have breakdown per platform? Not sure if each of these issues is shared between iOS and Android or specific to one or the other. Would be nice to know as we check things out. On Fri, May 15, 2015 at 4:38 PM, Adam Baso &lt;abaso(a)wikimedia.org&gt; wrote: > Marcel, thanks for the links and Dmitry thanks for coordinating this. > > A couple notes from my memory: > > iOS: > EventLogging.h > <https://git.wikimedia.org/blob/apps%2Fios%2Fwikipedia.git/HEAD/Wikipedia%2FEventLogging%2FEventLoggingFunnel.h#L12> defines WMFEventLoggingMaxStringLength_Snippet > and WMFEventLoggingMaxStringLength_General, which are only currently used > for Share a Fact in WMFShareFunnel.m > <https://git.wikimedia.org/blob/apps%2Fios%2Fwikipedia.git/HEAD/Wikipedia%2FView%20Controllers%2FShareCard%2FWMFShareFunnel.m> . > Not sure if URL-encoding on the request path or actual database bytes > (Unicode?) occupied causes overflows despite this. > > As I recall, Android does something similar on Share a Fact ( > ShareAFactFunnel.java > <https://git.wikimedia.org/blob/apps%2Fandroid%2Fwikipedia.git/HEAD/wikipedia%2Fsrc%2Fmain%2Fjava%2Forg%2Fwikipedia%2Fanalytics%2FShareAFactFunnel.java#L19>). > Same thing here with URL-encoding and actual database bytes (Unicode?). > > -Adam > > > On Fri, May 15, 2015 at 1:21 PM, Marcel Ruiz Forns < > mforns(a)wikimedia.org&gt; wrote: > >> Dmitry, >> >> you're totally right, it was in the email, but it should have been in >> the wikis. >> I added some documentation on it here: >> https://wikitech.wikimedia.org/wiki/EventLogging#Log_size_limit >> >> Thanks! >> >> On Fri, May 15, 2015 at 10:00 PM, Dmitry Brant &lt;dbrant(a)wikimedia.org&gt; >> wrote: >> >>> [brain fart] it's in your email. :( Thanks! >>> >>> On Fri, May 15, 2015 at 3:59 PM, Dmitry Brant &lt;dbrant(a)wikimedia.org&gt; >>> wrote: >>> >>>> Thanks for reporting this, Marcel! >>>> I've created a task for us to correct the behavior of our EL >>>> funnels: https://phabricator.wikimedia.org/T99276 >>>> >>>> Is the actual character limit of EL messages specified somewhere? >>>> >>>> >>>> -Dmitry >>>> >>>> >>>> On Fri, May 15, 2015 at 3:41 PM, Marcel Ruiz Forns < >>>> mforns(a)wikimedia.org&gt; wrote: >>>> >>>>> Hi Mobile, >>>>> >>>>> Analyzing EventLogging logs we percieved that a significant share >>>>> of MobileWikiAppSavedPages, MobileWikiAppArticleSuggestions and >>>>> MobileWikiAppShareAFact events are failing validation. >>>>> >>>>> *1) MobileWikiAppShareAFact: 1.5% not validating* >>>>> In this schema, the field "text" stores long fractions of text >>>>> sometimes. >>>>> This exceeds the size limitation of EL, specially when the text >>>>> contains special characters, like chinese, greek, etc. >>>>> >>>>> *2) MobileWikiAppArticleSuggestions: 1% not validating* >>>>> In this case, it's the field "readMoreList" that is sometimes very >>>>> long, >>>>> specially when it contains special characters. >>>>> This, again, exceeds the log size limit. >>>>> >>>>> *3) MobileWikiAppSavedPages: 1% not validating* >>>>> Some events do not contain the required field "appInstallID". >>>>> >>>>> In cases 1) and 2) the percentage is not big overall, but it can >>>>> be that for a given language, a lot of events are lost. >>>>> >>>>> EventLogging performance is not compromised by these validation >>>>> errors, but we are receiving monitoring alerts, and would like to maintain >>>>> the validation rate close to 100%. >>>>> >>>>> Is it possible for you to somehow reduce the size of the logs of >>>>> 1) and 2)? >>>>> If so, have in mind that the log size limit is 1k, and that the >>>>> highest priority for us would be 2). >>>>> >>>>> Thank you! >>>>> >>>>> Marcel >>>>> >>>>> _______________________________________________ >>>>> Mobile-l mailing list >>>>> Mobile-l(a)lists.wikimedia.org >>>>> https://lists.wikimedia.org/mailman/listinfo/mobile-l >>>>> >>>>> >>>> >>> >> >> _______________________________________________ >> Mobile-l mailing list >> Mobile-l(a)lists.wikimedia.org >> https://lists.wikimedia.org/mailman/listinfo/mobile-l >> >> > > _______________________________________________ > Mobile-l mailing list > Mobile-l(a)lists.wikimedia.org > https://lists.wikimedia.org/mailman/listinfo/mobile-l > > -- Corey Floyd Software Engineer Mobile Apps / iOS Wikimedia Foundation