+1 (binding) Verified keys, quick start, unit tests. On Sat, Jan 24, 2015 at 4:26 PM, Joe Stein <joe.st...@stealth.ly> wrote:
> That makes sense, thanks! > > On Sat, Jan 24, 2015 at 7:00 PM, Jay Kreps <jay.kr...@gmail.com> wrote: > > > But I think the flaw in trying to guess what kind of serializer they will > > use is when we get it wrong. Basically let's say we guess "String". Say > 30% > > of the time we will be right and we will save the two configuration > lines. > > 70% of the time we will be wrong and the user gets a super cryptic > > ClassCastException: "xyz cannot be cast to [B" (because [B is how java > > chooses to display the byte array class just to up the pain), then they > > figure out how to subscribe to our mailing list and email us the cryptic > > exception, then we explain about how we helpfully set these properties > for > > them to save them time. :-) > > > > https://www.google.com/?gws_rd=ssl#q=kafka+classcastexception+%22%5BB%22 > > > > I think basically we did this experiment with the old clients and the > > conclusion is that serialization is something you basically have to think > > about to use Kafka and trying to guess just makes things worse. > > > > -Jay > > > > On Sat, Jan 24, 2015 at 2:51 PM, Joe Stein <joe.st...@stealth.ly> wrote: > > > >> Maybe. I think the StringSerialzer could look more like a typical type > of > >> message. Instead of encoding being a property it would be more > typically > >> just written in the bytes. > >> > >> On Sat, Jan 24, 2015 at 12:12 AM, Jay Kreps <jay.kr...@gmail.com> > wrote: > >> > >> > I don't think so--see if you buy my explanation. We previously > defaulted > >> > to the byte array serializer and it was a source of unending > frustration > >> > and confusion. Since it wasn't a required config people just went > along > >> > plugging in whatever objects they had, and thinking that changing the > >> > parametric types would somehow help. Then they would get a class case > >> > exception and assume our stuff was somehow busted, not realizing we > had > >> > helpfully configured a type different from what they were passing in > >> under > >> > the covers. So I think it is actually good for people to think: how > am I > >> > serializing my data, and getting that exception will make them ask > that > >> > question right? > >> > > >> > -Jay > >> > > >> > On Fri, Jan 23, 2015 at 9:06 PM, Joe Stein <joe.st...@stealth.ly> > >> wrote: > >> > > >> >> Should value.serializer in the new java producer be defaulted to > >> >> Array[Byte] ? > >> >> > >> >> I was working on testing some upgrade paths and got this > >> >> > >> >> ! return exception in callback when buffer cannot accept message > >> >> > >> >> ConfigException: Missing required configuration > >> "value.serializer" > >> >> which has no default value. (ConfigDef.java:124) > >> >> > >> >> org.apache.kafka.common.config.ConfigDef.parse(ConfigDef.java:124) > >> >> > >> >> > >> >> > >> >> > >> > org.apache.kafka.common.config.AbstractConfig.<init>(AbstractConfig.java:48) > >> >> > >> >> > >> >> > >> >> > >> > org.apache.kafka.clients.producer.ProducerConfig.<init>(ProducerConfig.java:235) > >> >> > >> >> > >> >> > >> >> > >> > org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:129) > >> >> > >> >> > >> >> > >> >> > >> > ly.stealth.testing.BaseSpec$class.createNewKafkaProducer(BaseSpec.scala:42) > >> >> > >> >> > >> ly.stealth.testing.KafkaSpec.createNewKafkaProducer(KafkaSpec.scala:36) > >> >> > >> >> > >> >> > >> >> > >> > ly.stealth.testing.KafkaSpec$$anonfun$3$$anonfun$apply$37.apply(KafkaSpec.scala:175) > >> >> > >> >> > >> >> > >> >> > >> > ly.stealth.testing.KafkaSpec$$anonfun$3$$anonfun$apply$37.apply(KafkaSpec.scala:170) > >> >> > >> >> > >> >> > >> >> On Fri, Jan 23, 2015 at 5:55 PM, Jun Rao <j...@confluent.io> wrote: > >> >> > >> >> > This is a reminder that the deadline for the vote is this Monday, > Jan > >> >> 26, > >> >> > 7pm PT. > >> >> > > >> >> > Thanks, > >> >> > > >> >> > Jun > >> >> > > >> >> > On Wed, Jan 21, 2015 at 8:28 AM, Jun Rao <j...@confluent.io> wrote: > >> >> > > >> >> >> This is the second candidate for release of Apache Kafka 0.8.2.0. > >> There > >> >> >> has been some changes since the 0.8.2 beta release, especially in > >> the > >> >> new > >> >> >> java producer api and jmx mbean names. It would be great if people > >> can > >> >> test > >> >> >> this out thoroughly. > >> >> >> > >> >> >> Release Notes for the 0.8.2.0 release > >> >> >> > >> >> >> > >> >> > >> > https://people.apache.org/~junrao/kafka-0.8.2.0-candidate2/RELEASE_NOTES.html > >> >> >> > >> >> >> *** Please download, test and vote by Monday, Jan 26h, 7pm PT > >> >> >> > >> >> >> Kafka's KEYS file containing PGP keys we use to sign the release: > >> >> >> http://kafka.apache.org/KEYS in addition to the md5, sha1 and > sha2 > >> >> >> (SHA256) checksum. > >> >> >> > >> >> >> * Release artifacts to be voted upon (source and binary): > >> >> >> https://people.apache.org/~junrao/kafka-0.8.2.0-candidate2/ > >> >> >> > >> >> >> * Maven artifacts to be voted upon prior to release: > >> >> >> https://repository.apache.org/content/groups/staging/ > >> >> >> > >> >> >> * scala-doc > >> >> >> > >> https://people.apache.org/~junrao/kafka-0.8.2.0-candidate2/scaladoc/ > >> >> >> > >> >> >> * java-doc > >> >> >> > https://people.apache.org/~junrao/kafka-0.8.2.0-candidate2/javadoc/ > >> >> >> > >> >> >> * The tag to be voted upon (off the 0.8.2 branch) is the 0.8.2.0 > tag > >> >> >> > >> >> >> > >> >> > >> > https://git-wip-us.apache.org/repos/asf?p=kafka.git;a=tag;h=058d58adef2ab2787e49d8efeefd61bb3d32f99c > >> >> >> (commit 0b312a6b9f0833d38eec434bfff4c647c1814564) > >> >> >> > >> >> >> /******************************************* > >> >> >> > >> >> >> Thanks, > >> >> >> > >> >> >> Jun > >> >> >> > >> >> >> > >> >> > -- > >> >> > You received this message because you are subscribed to the Google > >> >> Groups > >> >> > "kafka-clients" group. > >> >> > To unsubscribe from this group and stop receiving emails from it, > >> send > >> >> an > >> >> > email to kafka-clients+unsubscr...@googlegroups.com. > >> >> > To post to this group, send email to > kafka-clie...@googlegroups.com. > >> >> > Visit this group at http://groups.google.com/group/kafka-clients. > >> >> > To view this discussion on the web visit > >> >> > > >> >> > >> > https://groups.google.com/d/msgid/kafka-clients/CAFc58G83a%3DsvoKkkB3476kpbcQ8p0Fob6vtJYj9CgxMACvvEEQ%40mail.gmail.com > >> >> > < > >> >> > >> > https://groups.google.com/d/msgid/kafka-clients/CAFc58G83a%3DsvoKkkB3476kpbcQ8p0Fob6vtJYj9CgxMACvvEEQ%40mail.gmail.com?utm_medium=email&utm_source=footer > >> >> > > >> >> > . > >> >> > > >> >> > For more options, visit https://groups.google.com/d/optout. > >> >> > > >> >> > >> > > >> > -- > >> > You received this message because you are subscribed to the Google > >> Groups > >> > "kafka-clients" group. > >> > To unsubscribe from this group and stop receiving emails from it, send > >> an > >> > email to kafka-clients+unsubscr...@googlegroups.com. > >> > To post to this group, send email to kafka-clie...@googlegroups.com. > >> > Visit this group at http://groups.google.com/group/kafka-clients. > >> > To view this discussion on the web visit > >> > > >> > https://groups.google.com/d/msgid/kafka-clients/CAOeJiJhB_ncKnk48Jw3TbpbULzq6oZRZSKDBOXdid%2BV_WzHuhQ%40mail.gmail.com > >> > < > >> > https://groups.google.com/d/msgid/kafka-clients/CAOeJiJhB_ncKnk48Jw3TbpbULzq6oZRZSKDBOXdid%2BV_WzHuhQ%40mail.gmail.com?utm_medium=email&utm_source=footer > >> > > >> > . > >> > > >> > For more options, visit https://groups.google.com/d/optout. > >> > > >> > > > > -- > > You received this message because you are subscribed to the Google Groups > > "kafka-clients" group. > > To unsubscribe from this group and stop receiving emails from it, send an > > email to kafka-clients+unsubscr...@googlegroups.com. > > To post to this group, send email to kafka-clie...@googlegroups.com. > > Visit this group at http://groups.google.com/group/kafka-clients. > > To view this discussion on the web visit > > > https://groups.google.com/d/msgid/kafka-clients/CAOeJiJgO6mvJ-y8pe6ik5GuDp%2BvufoJi-U23LqVnbjXWj16JMw%40mail.gmail.com > > < > https://groups.google.com/d/msgid/kafka-clients/CAOeJiJgO6mvJ-y8pe6ik5GuDp%2BvufoJi-U23LqVnbjXWj16JMw%40mail.gmail.com?utm_medium=email&utm_source=footer > > > > . > > > > For more options, visit https://groups.google.com/d/optout. > > > -- Thanks, Neha
