Hi all, I'm something of a kafka n00b. I posted the following in the google newsgroup, haven't had a reply or even a single read so I'll try here. My original msg, slightly edited, was:
---- (windows 2K8R2 fully patched, 16GB ram, fairly modern dual core xeon server, latest version of java) I've spent several days trying to sort out unexpected behaviour involving kafka and the kafka console producer and consumer. If I set the console produced and console consumer to look at the same topic then I can type lines into the producer window and see them appear in the consumer window, so it works. If I try to pipe in large amounts of data to the producer, some gets lost and the producer reports errors eg. [2017-04-17 18:14:05,868] ERROR Error when sending message to topic big_ptns1_repl1_nozip with key: null, value: 55 bytes with error: (org.apache.kafka.clients. producer.internals.ErrorLoggingCallback) org.apache.kafka.common.errors.TimeoutException: Batch containing 8 record(s) expired due to timeout while requesting metadata from brokers for big_ptns1_repl1_nozip-0 I'm using as input a file either shakespeare's full works (about 5.4 meg ascii), or a much larger file of shakespear's full works replicated 900 times to make it about 5GB. Lines are ascii and short, and each line should be a single record when read in by the console producer. I need to do some benchmarking on time and space and this was my first try. As mentioned, data gets lost. I presume it is expected that any data we pipe into the producer should arrive in the consumer, so if I do this in one windows console: kafka-console-consumer.bat --bootstrap-server localhost:9092 --topic big_ptns1_repl1_nozip --zookeeper localhost:2181 > F:\Users\me\Desktop\shakespear\single_all_shakespear_OUT.txt and this in another: kafka-console-producer.bat --broker-list localhost:9092 --topic big_ptns1_repl1_nozip < F:\Users\me\Desktop\shakespear\complete_works_no_bare_lines.txt then the output file "single_all_shakespear_OUT.txt" should be identical to the input file "complete_works_no_bare_lines.txt" except it's not. For the complete works (sabout 5.4 meg uncompressed) I lost about 130K in the output. For the replicated shakespeare, which is about 5GB, I lost about 150 meg. This can't be right surely and it's repeatable but happens at different places in the file when errors start to be produced, it seems. I've done this using all 3 versions of kafak in the 0.10.x.y branch and I get the same problem (the above commands were using the 0.10.0.0 branch so they look a little obsolete but they are right for that branch I think). It's cost me some days. So, am I making a mistake, if so what? thanks jan
