Akka remote `system.shutdown()` leads to EndpointD

I have simple Client and Server setup and at some point after sending all the asynchronous requests and upon the Server acknowledging it, the Client invokes system.shutdown(). This leads the Server to akka.remote.EndpointDisassociatedException and a bunch of log errors as shown below. I'm not happy with a bunch of errors in my logs so I would like to know what's causing all this. The outcome of the system as a whole works successfully, the error only shows at the point where the Client shutdown.

28.Jun.2013-10:13:01 ERROR EndpointWriter - AssociationError [akka.tcp://MapReduceApp@127.0.0.1:2552] <- [akka.tcp://WordCountClientApp@192.168.224.65:2552]: Error [Disassociated] [
akka.remote.EndpointDisassociatedException: Disassociated
]
28.Jun.2013-10:13:01 DEBUG EndpointWriter - Disassociated [akka.tcp://MapReduceApp@127.0.0.1:2552] <- [akka.tcp://WordCountClientApp@192.168.224.65:2552]
28.Jun.2013-10:13:01 ERROR EndpointWriter - AssociationError [akka.tcp://MapReduceApp@127.0.0.1:2552] -> [akka.tcp://WordCountClientApp@192.168.224.65:2552]: Error [Association failed with [akka.tcp://WordCountClientApp@192.168.224.65:2552]] [
akka.remote.EndpointAssociationException: Association failed with [akka.tcp://WordCountClientApp@192.168.224.65:2552]
Caused by: akka.remote.transport.netty.NettyTransport$$anonfun$associate$1$$anon$2: Connection refused: /192.168.224.65:2552
]
28.Jun.2013-10:13:01 DEBUG EndpointWriter - Disassociated [akka.tcp://MapReduceApp@127.0.0.1:2552] -> [akka.tcp://WordCountClientApp@192.168.224.65:2552]
28.Jun.2013-10:13:01 ERROR EndpointWriter - AssociationError [akka.tcp://MapReduceApp@127.0.0.1:2552] -> [akka.tcp://WordCountClientApp@192.168.224.65:2552]: Error [Association failed with [akka.tcp://WordCountClientApp@192.168.224.65:2552]] [
akka.remote.EndpointAssociationException: Association failed with [akka.tcp://WordCountClientApp@192.168.224.65:2552]
Caused by: akka.remote.transport.netty.NettyTransport$$anonfun$associate$1$$anon$2: Connection refused: /192.168.224.65:2552
]
28.Jun.2013-10:13:01 DEBUG EndpointWriter - Disassociated [akka.tcp://MapReduceApp@127.0.0.1:2552] -> [akka.tcp://WordCountClientApp@192.168.224.65:2552]
28.Jun.2013-10:13:01 ERROR EndpointWriter - AssociationError [akka.tcp://MapReduceApp@127.0.0.1:2552] -> [akka.tcp://WordCountClientApp@192.168.224.65:2552]: Error [Association failed with [akka.tcp://WordCountClientApp@192.168.224.65:2552]] [
akka.remote.EndpointAssociationException: Association failed with [akka.tcp://WordCountClientApp@192.168.224.65:2552]
Caused by: akka.remote.transport.netty.NettyTransport$$anonfun$associate$1$$anon$2: Connection refused: /192.168.224.65:2552
]
28.Jun.2013-10:13:01 DEBUG EndpointWriter - Disassociated [akka.tcp://MapReduceApp@127.0.0.1:2552] -> [akka.tcp://WordCountClientApp@192.168.224.65:2552]

UPDATE: I'm using Akka version 2.2.0-RC1 and the Scala version is 2.10.0 but it also happens with Scala version 2.10.1. I use Maven and the software versions are:

<properties>
    <scala.version>2.10.0</scala.version>
    <akka.version>2.2.0-RC1</akka.version>
    <scalatest.version>2.0.M6-SNAP16</scalatest.version>
    <log4j.version>1.2.17</log4j.version>
    <slf4j.version>1.7.5</slf4j.version>
    <commons-lang3.version>3.1</commons-lang3.version>
    <guava.version>14.0.1</guava.version>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>

and the corresponding dependencies:

<dependencies>
    <dependency>
        <groupId>org.scala-lang</groupId>
        <artifactId>scala-library</artifactId>
        <version>${scala.version}</version>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-actor_2.10</artifactId>
        <version>${akka.version}</version>
        <exclusions>
                <exclusion>
                <groupId>org.scala-lang</groupId>
                <artifactId>scala-library</artifactId>
                </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-remote_2.10</artifactId>
        <version>${akka.version}</version>
        <exclusions>
                <exclusion>
                <groupId>org.scala-lang</groupId>
                <artifactId>scala-library</artifactId>
                </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-kernel_2.10</artifactId>
        <version>${akka.version}</version>
        <exclusions>
                <exclusion>
                <groupId>org.scala-lang</groupId>
                <artifactId>scala-library</artifactId>
                </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-agent_2.10</artifactId>
        <version>${akka.version}</version>
        <exclusions>
                <exclusion>
                <groupId>org.scala-lang</groupId>
                <artifactId>scala-library</artifactId>
                </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-zeromq_2.10</artifactId>
        <version>${akka.version}</version>
        <exclusions>
                <exclusion>
                <groupId>org.scala-lang</groupId>
                <artifactId>scala-library</artifactId>
                </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>com.typesafe.akka</groupId>
        <artifactId>akka-slf4j_2.10</artifactId>
        <version>${akka.version}</version>
        <exclusions>
                <exclusion>
                <groupId>org.scala-lang</groupId>
                <artifactId>scala-library</artifactId>
                </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>log4j</groupId>
        <artifactId>log4j</artifactId>
        <version>${log4j.version}</version>
    </dependency>
    <dependency>
        <groupId>org.slf4j</groupId>
        <artifactId>slf4j-log4j12</artifactId>
        <version>${slf4j.version}</version>
    </dependency>
    <dependency>
        <groupId>org.apache.commons</groupId>
        <artifactId>commons-lang3</artifactId>
        <version>${commons-lang3.version}</version>
    </dependency>
    <dependency>
        <groupId>com.google.guava</groupId>
        <artifactId>guava</artifactId>
        <version>${guava.version}</version>
    </dependency>
    <!-- Test dependencies -->
    <dependency>
        <groupId>org.scalatest</groupId>
        <artifactId>scalatest_2.10</artifactId>
        <version>${scalatest.version}</version>
        <scope>test</scope>
    </dependency>
</dependencies>

You can disable this logging with configuration property: akka.remote.log-remote-lifecycle-events=off