I am a student who aspires to be a developer in Korea.

I learned jgroups while studying ehcache and jgroup with spring-boot

I am trying to copy / distribute the cache to two computers.

However, I have not been able to improve my progress because I have problems while trying.

I would like to get help for this.

I entered dependency in pom.xml as follows.

<dependency>

    <groupId>net.sf.ehcache</groupId>

    <artifactId>ehcache</artifactId>

    <version>2.10.4</version>

</dependency>

<dependency>

    <groupId>org.jgroups</groupId>

    <artifactId>jgroups</artifactId>

    <version>3.2.5.Final</version>

</dependency>

<dependency>

    <groupId>net.sf.ehcache</groupId>

    <artifactId>ehcache-jgroupsreplication</artifactId>

    <version>1.7</version>

</dependency>

And ehcache.xml is as follows.

<ehcache xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

                xsi:noNamespaceSchemaLocation="../../../main/config/ehcache.xsd">

        <diskStore path="java.io.tmpdir/one" />

        <cacheManagerPeerProviderFactory

                        class="net.sf.ehcache.distribution.jgroups.JGroupsCacheManagerPeerProviderFactory"

                        properties="connect=UDP(mcast_addr=230.0.0.1;mcast_port=7800;):PING:

                        MERGE2:FD_SOCK:VERIFY_SUSPECT:pbcast.NAKACK:UNICAST:pbcast.STABLE:FRAG:pbcast.GMS"

                        propertySeparator="::" />

        <cache name="serverResourceInfoCache" maxEntriesLocalHeap="1000"

                    eternal="false" timeToIdleSeconds="1000" timeToLiveSeconds="1000"

                    overflowToDisk="false">

                <cacheEventListenerFactory

                        class="net.sf.ehcache.distribution.jgroups.JGroupsCacheReplicatorFactory"

                        properties="replicateAsynchronously=true, replicatePuts=true,

                        replicateUpdates=true, replicateUpdatesViaCopy=false,

                        replicateRemovals=true" />

        </cache>

</ehcache>

Finally, jgroups_tcp.xml looks like this

<config>

        <TCP bind_addr="127.0.0.1" bind_port = "7800" loopback="true"/>

        <TCPPING timeout = "3000"

                    initial_hosts = "192.168.10.156 [7800], 192.168.10.248 [7800]"

                    port_range = "10"

                    num_initial_members = "3"/>

        <VERIFY_SUSPECT timeout = "1500"/>

        <pbcast.NAKACK use_mcast_xmit = "false" gc_lag = "100"

                    retransmit_timeout = "300,600,1200,2400,4800"

                    discard_delivered_msgs = "true"/>

        <pbcast.STABLE stability_delay = "1000" desired_avg_gossip = "50000" max_bytes = "400000"/>

        <pbcast.GMS print_local_addr = "true" join_timeout = "5000" shun = "false" view_bundling = "true"/>

</config>

However, when I rotate both of them, the following error keeps appearing

I've looked up this error and tried several ways, but I can not finish it.

I would appreciate it if you could give me a good way.