we use jgoups TCP_NIO2 protocol stacks

after we upgrade to jgroups 5.1.5 throw following exception in our dev env.

21-02-25 14:42:50.357 WARN [NioConnection.Reader [172.30.1.161:7802]-27,shared=common TCP_NIO2.warn:120]failed handling message
java.nio.channels.NotYetConnectedException: null
at java.base/sun.nio.ch.SocketChannelImpl.ensureOpenAndConnected(SocketChannelImpl.java:178)
at java.base/sun.nio.ch.SocketChannelImpl.beginRead(SocketChannelImpl.java:312)
at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:347)
at org.jgroups.nio.Buffers.readLengthAndData(Buffers.java:128)
at org.jgroups.blocks.cs.NioConnection._receive(NioConnection.java:247)
at org.jgroups.blocks.cs.NioConnection$Reader._run(NioConnection.java:483)
at org.jgroups.blocks.cs.NioConnection$Reader.run(NioConnection.java:471)
at java.base/java.lang.Thread.run(Thread.java:834)
21-02-25 14:42:53.348 WARN [main AbstractJGroupsMessenger.viewAccepted:228][system.messenger.common]jgroups discover[TIMEOUT]: 1, elapsed time: 6293 ms
21-02-25 14:43:02.501 WARN [hedging.persister.database AbstractJournaler.loop:369][hedging.persister.database]failed to seek: 1364436024374509085
21-02-25 14:43:02.513 WARN [holding.persister.database AbstractJournaler.loop:369][holding.persister.database]failed to seek: 1348674154999584257
21-02-25 14:43:02.567 WARN [pricing.persister.redis AbstractJournaler.loop:369][pricing.persister.redis]failed to seek: 1364471253746595885
21-02-25 14:43:02.569 WARN [pricing.persister.database AbstractJournaler.loop:369][pricing.persister.database]failed to seek: 1364471253746595885
21-02-25 14:43:02.605 WARN [trading.persister.database.0 AbstractJournaler.loop:369][trading.persister.database.0]failed to seek: 1364234418297976373
21-02-25 14:43:02.610 WARN [trading.persister.database.1 AbstractJournaler.loop:369][trading.persister.database.1]failed to seek: 1364234418297975861
21-02-25 14:43:02.645 WARN [dealing.persister.database AbstractJournaler.loop:369][dealing.persister.database]failed to seek: 1364436024417785365
21-02-25 14:43:02.674 WARN [customer.persister.database AbstractJournaler.loop:369][customer.persister.database]failed to seek: 1364234470919554125
21-02-25 14:43:02.704 WARN [courier.mail.customer.pump AbstractJournaler.loop:369][courier.mail.customer.pump]failed to seek: 1361051105273893941
21-02-25 14:43:02.720 WARN [courier.push.customer.pump AbstractJournaler.loop:369][courier.push.customer.pump]failed to seek: 1361051105273893941
21-02-25 14:43:11.859 WARN [NioConnection.Reader [172.30.1.161:7805]-38,shared=common TCP_NIO2.warn:120]failed handling message
java.nio.channels.NotYetConnectedException: null
at java.base/sun.nio.ch.SocketChannelImpl.ensureOpenAndConnected(SocketChannelImpl.java:178)
at java.base/sun.nio.ch.SocketChannelImpl.beginRead(SocketChannelImpl.java:312)
at java.base/sun.nio.ch.SocketChannelImpl.read(SocketChannelImpl.java:347)
at org.jgroups.nio.Buffers.readLengthAndData(Buffers.java:128)
at org.jgroups.blocks.cs.NioConnection._receive(NioConnection.java:247)
at org.jgroups.blocks.cs.NioConnection$Reader._run(NioConnection.java:483)
at org.jgroups.blocks.cs.NioConnection$Reader.run(NioConnection.java:471)
at java.base/java.lang.Thread.run(Thread.java:834)

jgroups properties

<config xmlns="urn:org:jgroups" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="urn:org:jgroups http://www.jgroups.org/schema/jgroups.xsd"
version="5.0.4.Final">

<TCP_NIO2
recv_buf_size="2M"
send_buf_size="2M"
max_bundle_size="64K"
max_send_buffers="32"
sock_conn_timeout="3000"
reader_idle_time="300000"
enable_diagnostics="false"
thread_pool.enabled="true"
thread_naming_pattern="cl"
logical_addr_cache_max_size="100000"
logical_addr_cache_expiration="3600000"

bind_port="${jgroups.tcp.bind.port}"
port_range="${jgroups.tcp.port.range}"
thread_pool.min_threads="${jgroups.threads.min}"
thread_pool.max_threads="${jgroups.threads.max}"
thread_pool.keep_alive_time = "${jgroups.threads.ttl}"/>

<TCPPING
async_discovery="true"
port_range="${jgroups.tcp.port.range}"
initial_hosts="${jgroups.tcp.initial.hosts}"
async_discovery_use_separate_thread_per_request="true"/>

<MERGE3 min_interval="10000" max_interval="30000"/>
<!-- <FD_SOCK/> --><FD_ALL3 timeout="30000"/>
<VERIFY_SUSPECT timeout="3000"/>
<!-- <BARRIER /> -->

<pbcast.NAKACK2 use_mcast_xmit="false" xmit_interval="300" xmit_table_max_compaction_time="30000"/>
<UNICAST3 xmit_interval="300" xmit_table_max_compaction_time="30000"/>

<pbcast.STABLE desired_avg_gossip="60000" max_bytes="4M"/>
<pbcast.GMS join_timeout="5000" max_join_attempts="0"/>

<UFC max_credits="6M" min_threshold="0.4"/>
<MFC max_credits="6M" min_threshold="0.4"/>
<FRAG2 frag_size="60K"/>

<!-RSVP resend_interval="2000" timeout="10000"/->
<!-- <pbcast.STATE_TRANSFER/> -->
</config>