Hi, Thank you Yi, what you mentioned seemed to be the issue. Configuring the metrics serdes fixed the metrics output. The reason I had not added them initially was because the wikipedia-application.properties file in the hello-samza example here: ( https://github.com/apache/samza-hello-samza/blob/master/src/main/config/wikipedia-application.properties ) does not have them configured.
Using that configuration for the wikipedia-application demo did not produce metrics. But, surprisingly, not configuring the serdes for the wikipedia-feed demo either (which uses the low-level API) worked fine, which is why I was wondering if metrics is configured differently when using the high-level API. I've linked the two demos below, with the .properties files used for each and the DEBUG logs generated. https://github.com/srujun/srujun.github.io/tree/master/files/samza/wikipedia-feed (metrics works as expected, emitting JSON-encoded messages to kafka.metrics) https://github.com/srujun/srujun.github.io/tree/master/files/samza/wikipedia-application (metrics not working unless serdes are also configured) >From what I can see, there are metrics serialization errors in the wikipedia-application logs, as expected. But no such issue for wikipedia-feed, even though no serde was configured. Is there some other issue here? Thank you again. On Fri, Jan 26, 2018 at 11:00 PM, Yi Pan <nickpa...@gmail.com> wrote: > Hi, Srujun, > > I noticed that you did not configure the metrics serde as stated here: > http://samza.apache.org/learn/documentation/0.14/container/metrics.html. > Could that be the reason? > > -Yi > > On Fri, Jan 26, 2018 at 7:58 PM, Jagadish Venkatraman < > jagadish1...@gmail.com> wrote: > > > Can you turn on DEBUG logging for the MetricsSnapshotReporter class and > > re-attach the logs? I cannot observe any obvious red-flag from your logs. > > > > On Fri, Jan 26, 2018 at 7:13 PM, Srujun Thanmay Gupta < > > sgupt...@illinois.edu > > > wrote: > > > > > Hello Yi, > > > > > > The logs are less than 100KB each, I'm not sure if that's too large for > > the > > > mailing list system. I've uploaded the log files to the links below, in > > > case others would like to look at them too. > > > > > > http://srujun.com/files/samza/wikipedia-application_samza- > > container-0.log > > > http://srujun.com/files/samza/wikipedia-application_samza- > > > job-coordinator.log > > > http://srujun.com/files/samza/wikipedia-feed_samza-container-0.log > > > http://srujun.com/files/samza/wikipedia-feed_samza-job-coordinator.log > > > > > > Thank you for your help! > > > > > > -- > > > Srujun Thanmay Gupta > > > > > > > > > > > -- > > Jagadish V, > > Graduate Student, > > Department of Computer Science, > > Stanford University > > > -- Srujun Thanmay Gupta
