Evan Huus created KAFKA-993:
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Summary: Offset Management API is either broken or mis-documented
Key: KAFKA-993
URL: https://issues.apache.org/jira/browse/KAFKA-993
Project: Kafka
Issue Type: Bug
Components: network
Affects Versions: 0.8, 0.8.1
Reporter: Evan Huus
Assignee: Jun Rao
I am in the process of building a set of Go client bindings for the new 0.8
protocol
(https://cwiki.apache.org/confluence/display/KAFKA/A+Guide+To+The+Kafka+Protocol).
Everything works but the Offset Commit/Fetch APIs. Fetch never returns and
data, and trying to Commit results in the broker forcibly disconnecting my
client. I have double-checked the bytes on the wire using Wireshark, and my
client is obeying the protocol spec.
After some digging, I found KAFKA-852 which seems related, but I have tried my
client against the 0.8 beta, 0.8 branch, and even trunk with the same results.
When I try and commit, the stack-trace that the broker produces is:
[2013-07-31 10:34:14,423] ERROR Closing socket for /192.168.12.71 because of
error (kafka.network.Processor)
java.nio.BufferUnderflowException
at java.nio.HeapByteBuffer.get(HeapByteBuffer.java:127)
at java.nio.ByteBuffer.get(ByteBuffer.java:675)
at kafka.api.ApiUtils$.readShortString(ApiUtils.scala:38)
at
kafka.api.UpdateMetadataRequest$$anonfun$readFrom$1.apply(UpdateMetadataRequest.scala:42)
at
kafka.api.UpdateMetadataRequest$$anonfun$readFrom$1.apply(UpdateMetadataRequest.scala:41)
at scala.collection.immutable.Range$ByOne$class.foreach(Range.scala:282)
at scala.collection.immutable.Range$$anon$2.foreach(Range.scala:265)
at
kafka.api.UpdateMetadataRequest$.readFrom(UpdateMetadataRequest.scala:41)
at kafka.api.RequestKeys$$anonfun$7.apply(RequestKeys.scala:42)
at kafka.api.RequestKeys$$anonfun$7.apply(RequestKeys.scala:42)
at kafka.network.RequestChannel$Request.<init>(RequestChannel.scala:49)
at kafka.network.Processor.read(SocketServer.scala:345)
at kafka.network.Processor.run(SocketServer.scala:245)
at java.lang.Thread.run(Thread.java:680)
Is this a bug, or is the protocol spec wrong? Also, since I can't seem to find
a straight answer anywhere else: is offset fetch/commit expected to be in 0.8,
0.8.1, or some later release?
Thanks,
Evan
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