Hello, You can check the offset from which your consumer starts to work ? If it doesn't match the expected one (0 I suppose), you can try to play with property called auto.offset.reset and set it to "earliest". You can find more information about: http://kafka.apache.org/documentation.html
You can also turn on trace logs and check if message delivery is done before partitions assignments. If it doesn't work and consumer's offset is 0, maybe message you sent is not correctly delivered ? In this case checking logs should help. Best regards. On Thu, Jun 2, 2016 at 3:10 AM, Richard L. Burton III <mrbur...@gmail.com> wrote: > What I'm seeing is the consumer sometimes doesn't read the first message. > There are times when it does as well. > > Any clues what might cause it? >