No matter which logging solution you choose, if you try to log more messages than it can handle then something has to give: either the system’s message queues grow out of bounds or you start dropping log messages. If you use a bounded mailbox then make sure to set the wait time to 0s because otherwise the logging system will slow down your application. If on the other hand your “logging” must be done as a matter of correctness (or requirements) then I would rather call it auditing; in that case it is entirely reasonable to make the business processes wait for its completion.
Regards, Roland > 27 jul 2015 kl. 20:42 skrev Somak De <deso...@gmail.com>: > > Hi Ronald, > > Thanks for your answer. I will definitely explore the approach you have > suggested. In the meantime, as a workaround solution, we have reduced amount > of logging in the code and used standalone org.slf4j.logger instead of > akka.event.logger. That reduced the amount of heap memory growth drastically. > But I have few doubts/question > > 1. Our application has a very aggressive roadmap this year and as the > application grows, how org.slf4j.logger perform in a highly concurrent > environment? I was assuming that akka logger has been built to handle such > scenarios, so using a stand alone logger will do better? > > 2. I am curious to understand what exactly you meant by overloading the > logger application. Is it because to many request coming to the logger > mailbox? How using a bounded mailbox(LinkedBlockingQueue) help here, wont > that cause the threads to wait, causing degradation? > > To give an overview of amount of login that caused the issue, our application > has pick load of 100 req/min continuously for 3 hours. Average each req > creates 50 log entries. So roughly there is 500000 entries in 3 hours. This > is in a production application server > > Thanks > > On Mon, Jul 27, 2015 at 7:16 PM, Roland Kuhn <goo...@rkuhn.info > <mailto:goo...@rkuhn.info>> wrote: > As Johannes says you are most likely overloading the logging system. > Unfortunately the default event handlers do not offer protection against this > but you can easily write your own (start by copying this one > <https://github.com/akka/akka/blob/v2.4-M2/akka-slf4j/src/main/scala/akka/event/slf4j/Slf4jLogger.scala#L58>) > to use a bounded Mailbox or a bounded internal queue before dispatching to > the actual Logger (in a non-blocking fashion or in a child Actor). > > Regards, > > Roland > >> 24 jul 2015 kl. 20:13 skrev slowhandblues <deso...@gmail.com >> <mailto:deso...@gmail.com>>: >> >> Hi, >> >> Thanks for the response. Actually we are not creating any separate actor for >> log (unless akka creates internally). How do we identify the actor? The way >> we are trying to write logs is pretty much same as defined in akka >> documentation (http://doc.akka.io/docs/akka/2.0/java/logging.html >> <http://doc.akka.io/docs/akka/2.0/java/logging.html>) along with logback. >> >> On Friday, 24 July 2015 17:22:02 UTC+5:30, slowhandblues wrote: >> We have an application in Akka and having a problem with increasing heap >> memory that is growing with time and eventually crashing the application. On >> analyzing the heap dump we can see all our log entries are getting persisted >> in the memory. Below is object tree for the same >> >> Akka dispatcher --> Unbounded mail box --> concurrent linked queue --> >> envelop object consisting of all the log information >> >> Our actors are untyped actor and we are using akka default event logger for >> logging >> >> Any idea what could be the problem with this? >> >> >> >> Thanks, >> >> Somak >> >> >> -- >> >>>>>>>>>> Read the docs: http://akka.io/docs/ <http://akka.io/docs/> >> >>>>>>>>>> Check the FAQ: >> >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >> >>>>>>>>>> <http://doc.akka.io/docs/akka/current/additional/faq.html> >> >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user >> >>>>>>>>>> <https://groups.google.com/group/akka-user> >> --- >> You received this message because you are subscribed to the Google Groups >> "Akka User List" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to akka-user+unsubscr...@googlegroups.com >> <mailto:akka-user+unsubscr...@googlegroups.com>. >> To post to this group, send email to akka-user@googlegroups.com >> <mailto:akka-user@googlegroups.com>. >> Visit this group at http://groups.google.com/group/akka-user >> <http://groups.google.com/group/akka-user>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > > > > Dr. Roland Kuhn > Akka Tech Lead > Typesafe <http://typesafe.com/> – Reactive apps on the JVM. > twitter: @rolandkuhn > <http://twitter.com/#!/rolandkuhn> > > > > -- > >>>>>>>>>> Read the docs: http://akka.io/docs/ <http://akka.io/docs/> > >>>>>>>>>> Check the FAQ: > >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html > >>>>>>>>>> <http://doc.akka.io/docs/akka/current/additional/faq.html> > >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user > >>>>>>>>>> <https://groups.google.com/group/akka-user> > --- > You received this message because you are subscribed to the Google Groups > "Akka User List" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to akka-user+unsubscr...@googlegroups.com > <mailto:akka-user+unsubscr...@googlegroups.com>. > To post to this group, send email to akka-user@googlegroups.com > <mailto:akka-user@googlegroups.com>. > Visit this group at http://groups.google.com/group/akka-user > <http://groups.google.com/group/akka-user>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. Dr. Roland Kuhn Akka Tech Lead Typesafe <http://typesafe.com/> – Reactive apps on the JVM. twitter: @rolandkuhn <http://twitter.com/#!/rolandkuhn> -- >>>>>>>>>> Read the docs: http://akka.io/docs/ >>>>>>>>>> Check the FAQ: >>>>>>>>>> http://doc.akka.io/docs/akka/current/additional/faq.html >>>>>>>>>> Search the archives: https://groups.google.com/group/akka-user --- You received this message because you are subscribed to the Google Groups "Akka User List" group. To unsubscribe from this group and stop receiving emails from it, send an email to akka-user+unsubscr...@googlegroups.com. To post to this group, send email to akka-user@googlegroups.com. Visit this group at http://groups.google.com/group/akka-user. For more options, visit https://groups.google.com/d/optout.
