[CX] Connection reset by peer in StateCleanupTest, no failure reported

Observed on a recent couchsterix-test run:

http://analytics.jenkins.couchbase.com/job/couchsterix-test/com.couchbase.analytics$cbas-ingestion-test/908/consoleFull

+++ load start (gbook_messages) +++
..............................+++ load end (gbook_messages) +++
[cb-io-1-11] 18:11:11 WARN DefaultChannelPipeline:437 - An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
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:192)
at sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:380)
at com.couchbase.client.deps.io.netty.buffer.PooledUnsafeDirectByteBuf.setBytes(PooledUnsafeDirectByteBuf.java:221)
at com.couchbase.client.deps.io.netty.buffer.AbstractByteBuf.writeBytes(AbstractByteBuf.java:899)
at com.couchbase.client.deps.io.netty.channel.socket.nio.NioSocketChannel.doReadBytes(NioSocketChannel.java:241)
at com.couchbase.client.deps.io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:119)
at com.couchbase.client.deps.io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:572)
at com.couchbase.client.deps.io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:513)
at com.couchbase.client.deps.io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:427)
at com.couchbase.client.deps.io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:399)
at com.couchbase.client.deps.io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:140)
at com.couchbase.client.deps.io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:144)
at java.lang.Thread.run(Thread.java:745)
Tests run: 1, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 57.209 sec - in com.couchbase.analytics.test.unit.StateCleanupTest