When starting 4 servers, which each join 8 different ReplicatedHashMaps over a multiplexed channel, we frequently get this;

2007-11-03 09:39:48,774 ERROR [STREAMING_STATE_TRANSFER sender,udp,192.168.164.227:33709] log.GeronimoLog (GeronimoLog.java:108) - failed returning the application state, will return null
java.lang.IllegalArgumentException: State provider 192.168.164.227:33709 does not have service with id space
at org.jgroups.mux.Multiplexer.handleStateRequest(Multiplexer.java:640)
at org.jgroups.mux.Multiplexer.up(Multiplexer.java:365)
at org.jgroups.JChannel.up(JChannel.java:1147)
at org.jgroups.stack.ProtocolStack.up(ProtocolStack.java:341)
at org.jgroups.protocols.pbcast.FLUSH.up(FLUSH.java:428)
at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER$StateProviderHandler.process(STREAMING_STATE_TRANSFER.java:731)
at org.jgroups.protocols.pbcast.STREAMING_STATE_TRANSFER$StateProviderThreadSpawner$1.run(STREAMING_STATE_TRANSFER.java:648)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:885)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:907)
at java.lang.Thread.run(Thread.java:619)

This is using the following stacks.xml;

<protocol_stacks>
<stack name="udp">
<config>
<UDP
mcast_addr="${jgroups.udp.mcast_addr}"
mcast_port="${jgroups.udp.mcast_port}"
tos="8"
ucast_recv_buf_size="20000000"
ucast_send_buf_size="640000"
mcast_recv_buf_size="25000000"
mcast_send_buf_size="640000"
loopback="false"
discard_incompatible_packets="true"
max_bundle_size="64000"
max_bundle_timeout="30"
use_incoming_packet_handler="true"
ip_ttl="${jgroups.udp.ip_ttl:32}"
enable_bundling="true"
enable_diagnostics="false"
thread_naming_pattern="cl"
use_concurrent_stack="true"
thread_pool.enabled="true"
thread_pool.min_threads="1"
thread_pool.max_threads="25"
thread_pool.keep_alive_time="5000"
thread_pool.queue_enabled="false"
thread_pool.queue_max_size="100"
thread_pool.rejection_policy="Run"
oob_thread_pool.enabled="true"
oob_thread_pool.min_threads="1"
oob_thread_pool.max_threads="8"
oob_thread_pool.keep_alive_time="5000"
oob_thread_pool.queue_enabled="false"
oob_thread_pool.queue_max_size="100"
oob_thread_pool.rejection_policy="Run"/>
<PING timeout="${jgroups.ping.timeout:15000}"
num_initial_members="${jgroups.ping.num_initial_members:32}"/>
<MERGE2 max_interval="30000"
min_interval="10000"/>
<FD_SOCK/>
<FD timeout="10000" max_tries="5" shun="true"/>
<VERIFY_SUSPECT timeout="1500" />
<BARRIER />
<pbcast.NAKACK
use_mcast_xmit="false" gc_lag="10"
retransmit_timeout="300,600,1200,2400,4800"
discard_delivered_msgs="true"/>
<UNICAST timeout="300,600,1200,2400,3600"/>
<pbcast.STABLE stability_delay="1000" desired_avg_gossip="50000"
max_bytes="400000"/>
<VIEW_SYNC avg_send_interval="60000" />
<pbcast.GMS print_local_addr="false" join_timeout="10000"
join_retry_timeout="2000" shun="true"
view_bundling="true" view_ack_collection_timeout="5000"/>
<FC max_credits="20000000"
min_threshold="0.10"/>
<FRAG2 frag_size="60000" />
<pbcast.STREAMING_STATE_TRANSFER />
<pbcast.FLUSH timeout="0"/>
</config>
</stack>
</protocol_stacks>