Jason Rosenberg created KAFKA-2127:
--------------------------------------

             Summary: Running TopicCommand --alter causes connection 
close/reset errors in kafka logs
                 Key: KAFKA-2127
                 URL: https://issues.apache.org/jira/browse/KAFKA-2127
             Project: Kafka
          Issue Type: Bug
            Reporter: Jason Rosenberg
            Priority: Minor


I am using 0.8.2.1.  I've been noticing that any time I use TopicCommand to 
alter a topic (e.g. add partitions) or delete a topic, the broker logs show a 
bunch of closed connections, and usually 2 or 3 Connection reset exceptions.  
It logs these with ERROR status.

I recently used the kafka.admin.TopicCommand tool to increase the partitions 
for a topic from 1 to 4.  So I ran:

{code}
 java -cp kafka.jar kafka.admin.TopicCommand --zookeeper myzkserver:12345 
--topic mytopic --alter --partitions 4
{code}

{code}
2015-04-16 03:51:26,156  INFO [kafka-network-thread-27330-1] network.Processor 
- Closing socket connection to /1.2.3.12.
2015-04-16 03:51:26,169  INFO [kafka-network-thread-27330-0] network.Processor 
- Closing socket connection to /1.2.3.89.
2015-04-16 03:51:26,169  INFO [kafka-network-thread-27330-0] network.Processor 
- Closing socket connection to /1.2.3.95.
2015-04-16 03:51:26,176 ERROR [kafka-network-thread-27330-2] network.Processor 
- Closing socket for /1.2.4.34 because of error
java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
        at sun.nio.ch.IOUtil.read(IOUtil.java:197)
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
        at kafka.utils.Utils$.read(Utils.scala:380)
        at 
kafka.network.BoundedByteBufferReceive.readFrom(BoundedByteBufferReceive.scala:54)
        at kafka.network.Processor.read(SocketServer.scala:444)
        at kafka.network.Processor.run(SocketServer.scala:340)
        at java.lang.Thread.run(Thread.java:745)
2015-04-16 03:51:26,178 ERROR [kafka-network-thread-27330-1] network.Processor 
- Closing socket for /1.2.4.59 because of error
java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
        at sun.nio.ch.IOUtil.read(IOUtil.java:197)
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
        at kafka.utils.Utils$.read(Utils.scala:380)
        at 
kafka.network.BoundedByteBufferReceive.readFrom(BoundedByteBufferReceive.scala:54)
        at kafka.network.Processor.read(SocketServer.scala:444)
        at kafka.network.Processor.run(SocketServer.scala:340)
        at java.lang.Thread.run(Thread.java:745)
2015-04-16 03:51:26,192 ERROR [kafka-network-thread-27330-1] network.Processor 
- Closing socket for /1.2.3.11 because of error
java.io.IOException: Connection reset by peer
        at sun.nio.ch.FileDispatcherImpl.read0(Native Method)
        at sun.nio.ch.SocketDispatcher.read(SocketDispatcher.java:39)
        at sun.nio.ch.IOUtil.readIntoNativeBuffer(IOUtil.java:223)
        at sun.nio.ch.IOUtil.read(IOUtil.java:197)
        at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:379)
        at kafka.utils.Utils$.read(Utils.scala:380)
        at 
kafka.network.BoundedByteBufferReceive.readFrom(BoundedByteBufferReceive.scala:54)
        at kafka.network.Processor.read(SocketServer.scala:444)
        at kafka.network.Processor.run(SocketServer.scala:340)
        at java.lang.Thread.run(Thread.java:745)
2015-04-16 03:51:26,451  INFO [kafka-request-handler-3] 
server.ReplicaFetcherManager - [ReplicaFetcherManager on broker 45] Removed 
fetcher for partitions [mytopic,2]
2015-04-16 03:51:26,453  INFO [kafka-request-handler-3] log.Log - Completed 
load of log mytopic-2 with log end offset 0
2015-04-16 03:51:26,454  INFO [kafka-request-handler-3] log.LogManager - 
Created log for partition [mytopic,2] in 
/data_sdd/app/samsa-kafkaserver-ng/kafka_logs_ng with properties 
{segment.index.bytes -> 10485760, file.delete.delay.ms -> 60000, segment.bytes 
-> 1073741824, flush.ms -> 9223372036854775807, delete.retention.ms -> 
86400000, index.interval.bytes -> 4096, retention.bytes -> 50000000000, 
min.insync.replicas -> 1, cleanup.policy -> delete, 
unclean.leader.election.enable -> true, segment.ms -> 604800000, 
max.message.bytes -> 1000012, flush.messages -> 9223372036854775807, 
min.cleanable.dirty.ratio -> 0.5, retention.ms -> 86400000, segment.jitter.ms 
-> 0}.
2015-04-16 03:51:26,454  WARN [kafka-request-handler-3] cluster.Partition - 
Partition [mytopic,2] on broker 45: No checkpointed highwatermark is found for 
partition [mytopic,2]
2015-04-16 03:51:26,558  INFO [kafka-network-thread-27330-0] network.Processor 
- Closing socket connection to /1.2.4.34.
2015-04-16 03:51:26,658  INFO [kafka-network-thread-27330-0] network.Processor 
- Closing socket connection to /1.2.3.95.
2015-04-16 03:51:26,920  INFO [kafka-network-thread-27330-2] network.Processor 
- Closing socket connection to /1.2.4.246.
2015-04-16 03:51:26,921  INFO [kafka-network-thread-27330-2] network.Processor 
- Closing socket connection to /1.2.5.4.
{code}



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