Forked channel requires udp.xml file

<config xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns="urn:org:jgroups"
    xsi:schemaLocation="urn:org:jgroups http://www.jgroups.org/schema/JGroups-3.3.xsd" >

    <UDP
        enable_diagnostics="true"
        ip_mcast="true"
        ip_ttl="${jgroups.udp.ip_ttl:8}"
        loopback="true"
        max_bundle_size="1400"
        max_bundle_timeout="5"
        mcast_port="${jgroups.udp.mcast_port:45588}"
        mcast_recv_buf_size="200K"
        mcast_send_buf_size="200K"
        oob_thread_pool.enabled="true"
        oob_thread_pool.keep_alive_time="5000"
        oob_thread_pool.max_threads="8"
        oob_thread_pool.min_threads="1"
        oob_thread_pool.queue_enabled="false"
        oob_thread_pool.queue_max_size="100"
        oob_thread_pool.rejection_policy="discard"
        thread_naming_pattern="cl"
        thread_pool.enabled="true"
        thread_pool.keep_alive_time="5000"
        thread_pool.max_threads="8"
        thread_pool.min_threads="2"
        thread_pool.queue_enabled="true"
        thread_pool.queue_max_size="10000"
        thread_pool.rejection_policy="discard"
        timer.keep_alive_time="3000"
        timer.max_threads="10"
        timer.min_threads="4"
        timer.queue_max_size="500"
        timer_type="new3"
        tos="8"
        ucast_recv_buf_size="200K"
        ucast_send_buf_size="200K" />

    <PING />

    <MERGE2
        max_interval="30000"
        min_interval="10000" />

    <FD_SOCK />

    <FD_ALL />

    <VERIFY_SUSPECT timeout="1500" />

    <BARRIER />

    <pbcast.NAKACK2
        discard_delivered_msgs="true"
        max_msg_batch_size="500"
        use_mcast_xmit="false"
        xmit_interval="500"
        xmit_table_max_compaction_time="30000"
        xmit_table_msgs_per_row="2000"
        xmit_table_num_rows="100" />

    <UNICAST3
        conn_expiry_timeout="0"
        max_msg_batch_size="500"
        xmit_interval="500"
        xmit_table_max_compaction_time="60000"
        xmit_table_msgs_per_row="2000"
        xmit_table_num_rows="100" />

    <pbcast.STABLE
        desired_avg_gossip="50000"
        max_bytes="4M"
        stability_delay="1000" />

    <pbcast.GMS
        join_timeout="3000"
        print_local_addr="true"
        view_bundling="true" />

    <UFC
        max_credits="2M"
        min_threshold="0.4" />

    <MFC
        max_credits="2M"
        min_threshold="0.4" />

    <FRAG frag_size="1000" />

    <pbcast.STATE_TRANSFER />

    <FORK>

        <fork-stack id="main" >

            <config>
                <CENTRAL_LOCK num_backups="2" />
            </config>
        </fork-stack>

        <fork-stack id="lock" >

            <config>

                <CENTRAL_LOCK num_backups="2" />

                <STATS />
            </config>
        </fork-stack>
    </FORK>

</config>