I think we will make this change in the new consumer, which may be released in 0.9.
Guozhang On Wed, Jun 4, 2014 at 12:13 PM, Vladimir Tretyakov < vladimir.tretya...@sematext.com> wrote: > Hi, thx Guozhang Wang, looking forward. > > When do you think this changes will available? 0.8.2? Jul 2014 > https://cwiki.apache.org/confluence/display/KAFKA/Future+release+plan ? Or > later? > > Best regards, Vladimir. > > > On Wed, Jun 4, 2014 at 8:01 PM, Guozhang Wang <wangg...@gmail.com> wrote: > > > Hello Vladimir, comments in-lined. > > > > > > On Wed, Jun 4, 2014 at 6:08 AM, Vladimir Tretyakov < > > vladimir.tretya...@sematext.com> wrote: > > > > > Hi again, few more questions from me: > > > > > > *1.* > > > > > > What I see in JMX: > > > > > > > > > > > > kafka.consumer:type="ZookeeperConsumerConnector",name="af_servers-af_servers-spm_new_cluster_topic-af_servers_wawanawna-Dell-1401353748289-fcaaea29-0-FetchQueueSize" > > > > > > From code: > > > > > > newGauge( > > > config.clientId + "-" + config.groupId + "-" + > topicThreadId._1 + > > > "-" + topicThreadId._2 + "-FetchQueueSize", > > > new Gauge[Int] { > > > def value = q.size > > > } > > > ) > > > > > > I've tried to parse part as I've understood they. > > > > > > config.clientId >> af_servers > > > topicThreadId._1 >> af_servers-spm_new_cluster_topic > > > topicThreadId._2 >> af_servers_wawanawna-Dell-1401353748289-fcaaea29-0 > > > > > > Yes I can suppose that this topicThreadId._1 will always looks like > > > GROUP_ID+TOPIC and topicThreadId._2 will contain CONSUMER HOST, but > will > > it > > > always true? > > > > > > > > With the new consumer coming soon, the metrics naming schemes would very > > likely to be refined. So I cannot say this will always be true. > > > > > > > > > > > > *2.* > > > > > > From code I see that sometimes Kafka uses "_" as separator, not only > "-": > > > > > > val consumerIdString = { > > > var consumerUuid : String = null > > > config.consumerId match { > > > case Some(consumerId) // for testing only > > > => consumerUuid = consumerId > > > case None // generate unique consumerId automatically > > > => val uuid = UUID.randomUUID() > > > consumerUuid = "%s-%d-%s".format( > > > InetAddress.getLocalHost.getHostName, System.currentTimeMillis, > > > uuid.getMostSignificantBits().toHexString.substring(0,8)) > > > } > > > config.groupId + "_" + consumerUuid > > > } > > > > > > That means if user will use "_" as part of his host/topic/groupId name > it > > > maybe be a problem to parse string like: > > > > > > > > > > > > kafka.consumer:type="ZookeeperConsumerConnector",name="af_servers-af_servers-spm_new_cluster_topic-af_servers_wawanawna-Dell-1401353748289-fcaaea29-0-FetchQueueSize" > > > > > > Look at part: "spm_new_cluster_topic-af_servers_wawanawna-Dell", what > is > > > host name here "servers_wawanawna-Dell" or "wawanawna-Dell" ? > > > > > > So from one side if we want to be able parse name without any problems > we > > > have to avoid using "-" and "_" in host/topic/groupId/clientId, but at > > the > > > same time I see (from > > > http://grokbase.com/t/kafka/users/133xfsnpdh/cant-use-in-client-name): > > > > > > *"Client id is used for registering jmx beans for monitoring. Because > of > > > the* > > > *restrictions in bean names, we limit the client id to be only > > > alpha-numeric* > > > *plus "-" and "_"."* > > > > > > Does that mean user can use only camelCase in his > > > host/topic/groupId/clientId for distinguish one part of name from > > another? > > > > > > Is this a problem? Or I didn't understand something? > > > > > > > Yeah I agree this is a problem, and we should fix it in the new consumer. > > > > > > > > > > Best regards from Sematext. > > > > > > > > > > > > > > > > > > > > > On Tue, Jun 3, 2014 at 3:24 AM, Otis Gospodnetic < > > > otis.gospodne...@gmail.com > > > > wrote: > > > > > > > Hi Guozhang, > > > > > > > > On Mon, Jun 2, 2014 at 7:18 PM, Guozhang Wang <wangg...@gmail.com> > > > wrote: > > > > > > > > > That is indeed a problem, for now, we recommend group name and > topic > > > > names > > > > > to use "_" when there is a need for "-", but this should be fixed > > > > > systematically. > > > > > > > > > > > > > Right! > > > > > > > > For you use case, could you change your topic/group name using "_"? > > > > > > > > > > > > Our own Kafka doesn't use topics with "-" characters, so we don't > have > > a > > > > problem. > > > > > > > > The problem, in our case, is that we have a general (Kafka) > monitoring > > > tool > > > > that other people use to monitor Kafka - see > http://sematext.com/spm/ > > . > > > > So > > > > we can't really tell people "hey, our tool will work but only if you > > > don't > > > > have a dash in your topic names and hosts and ... because if you use > > > dashes > > > > we won't know how to parse your Kafka's MBean names" :) > > > > > > > > > > > > > Also, do you mind to file a JIRA ticket to keep track of this > issue? > > > > > > > > > > > > Here it is: https://issues.apache.org/jira/browse/KAFKA-1481 > > > > > > > > Otis > > > > -- > > > > Performance Monitoring * Log Analytics * Search Analytics > > > > Solr & Elasticsearch Support * http://sematext.com/ > > > > > > > > > > > > > > > > > > > > > > > > > > > > > > On Mon, Jun 2, 2014 at 5:18 AM, Vladimir Tretyakov < > > > > > vladimir.tretya...@sematext.com> wrote: > > > > > > > > > > > Hello everyone, > > > > > > > > > > > > We are adding Kafka 0.8.x monitoring support to SPM > > > > > > <http://sematext.com/spm/> here at Sematext. Unfortunately, we > > > quickly > > > > > hit > > > > > > an issue caused by the new bean naming convention that embeds > > things > > > > like > > > > > > topic and host names in the beans along with metrics, separated > by > > > > > dashes, > > > > > > making it hard to parse these beans. > > > > > > > > > > > > To put it simply: it is hard/impossible to automatically figure > out > > > > which > > > > > > part of the bean name is e.g. consumer group, which is the topic, > > > which > > > > > is > > > > > > the host name, and which is the name of the metric. > > > > > > > > > > > > Let me show you what I mean: > > > > > > > > > > > > kafka.consumer:type="ConsumerTopicMetrics", > > > > > > > > > > > > name="af_servers-spm_topic-BytesPerSec" > > > > > > > > > > > > Here we actually CAN extract: > > > > > > > > > > > > * consumer group ('af_servers') > > > > > > > > > > > > * topic ('spm_topic') > > > > > > > > > > > > * metric (‘BytesPerSec’) > > > > > > > > > > > > BUT what if the consumer group id and/or topic name contain '-'? > > > > > > > > > > > > Then how would we extract consumer group and topic? > > > > > > > > > > > > Here is a concrete example of this problem: > > > > > > > > > > > > kafka.consumer:type="ConsumerTopicMetrics", > > > > > > > > > > > > name="af-servers-spm-topic-BytesPerSec" > > > > > > > > > > > > How can we know what is group id or topic name here? > > > > > > > > > > > > This looks like a problem to me, but maybe I’m missing something? > > > > > > > > > > > > Is it possible to have all these values (group id, topic name) as > > > > > separate > > > > > > attributes inside JMX bean? > > > > > > > > > > > > Or maybe the problem could be solved if a different delimiter was > > > used, > > > > > > such as the pipe (“I”)? > > > > > > > > > > > > It is really needed things and will be nice to have it to build > > good > > > > tool > > > > > > for monitoring. > > > > > > > > > > > > Thx and best regards from Sematext. > > > > > > > > > > > > > > > > > > > > > > > > > > -- > > > > > -- Guozhang > > > > > > > > > > > > > > > > > > > > -- > > -- Guozhang > > > -- -- Guozhang
