gurka opened a new issue, #420:
URL: https://github.com/apache/mina-sshd/issues/420
### Version
2.9.2
### Bug description
We have two applications, `server` and `client`. `server` has an Apache MINA
SSHD server running and `client` connects to this using an Apache MINA SSHD
client. The `client` also sets up remort port forwarding tunnel, so that
`server` can connect to a REST service that is running on `client` via the ssh
connection.
After upgrading Apache MINA SSHD from version 1.4.0.0 to 2.9.2 on both
applications we started to see an INFO log entry on `client` about
"ClosedChannelException while shutting down output" when a connection over the
remote port forwarding tunnel is closed. It happens almost every time a
connection is closed, but not always.
`2023-09-27T10:23:01.257+02:00 INFO [131]
org.apache.sshd.common.io.nio2.Nio2Session
doCloseGracefully(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52239,
remote=localhost/127.0.0.1:8090]) ClosedChannelException while shutting down
output: null`
It seems to happen only when the connection is closed non-gracefully (RST
instead of FIN). We are not sure why the connection is closed non-gracefully,
it seems to be somehow related to `HttpURLConnection` and it's keep-alive
functionality. It seems to close the connection non-gracefully if the
connection has been idle for too long and is about to be removed from the
keep-alive cache. This matches the timing (5 seconds, as that is the default
keep-alive time) between connection creation and connection close.
As this is an INFO log entry it might not be a problem at all, maybe this is
fully expected when the connection over the tunnel is closed non-gracefully?
But in that case, maybe it should not be on log level INFO?
### Actual behavior
`ClosedChannelException` INFO log entry when connection over remote port
forwarding tunnel is closed non-gracefully.
### Expected behavior
Either no `ClosedChannelException` at all, or log level changed to avoid
flooding the log when there are many connections created and closed over the
tunnel.
### Relevant log output
```Shell
2023-09-27T10:34:41.484+02:00 DEBUG [105]
org.apache.sshd.common.io.nio2.Nio2Session Creating IoSession on
/[0:0:0:0:0:0:0:0]:52813 from localhost/127.0.0.1:8090 via null
2023-09-27T10:34:41.484+02:00 DEBUG [105]
org.apache.sshd.common.io.nio2.Nio2Session
suspendRead(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) requesting read suspension
2023-09-27T10:34:41.484+02:00 DEBUG [105]
org.apache.sshd.client.session.ClientConnectionService
channelOpenSuccess(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
send SSH_MSG_CHANNEL_OPEN_CONFIRMATION recipient=87, sender=87,
window-size=2097152, packet-size=32768
2023-09-27T10:34:41.484+02:00 DEBUG [105]
org.apache.sshd.client.session.ClientSessionImpl
encode(ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
packet #361 sending command=91[SSH_MSG_CHANNEL_OPEN_CONFIRMATION] len=17
2023-09-27T10:34:41.485+02:00 DEBUG [105]
org.apache.sshd.common.io.nio2.Nio2Session
writeBuffer(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52479,
remote=/127.0.0.1:8183]) writing 80 bytes
2023-09-27T10:34:41.485+02:00 DEBUG [107]
org.apache.sshd.client.session.ClientSessionImpl
doHandleMessage(ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
process #417 SSH_MSG_CHANNEL_DATA
2023-09-27T10:34:41.485+02:00 DEBUG [107]
org.apache.sshd.common.channel.LocalWindow Consume
LocalWindow[server](TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
by 184 down to 2096968
2023-09-27T10:34:41.485+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel
handleData(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
SSH_MSG_CHANNEL_DATA len=184
2023-09-27T10:34:41.485+02:00 DEBUG [107]
org.apache.sshd.common.io.nio2.Nio2Session
writeBuffer(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) writing 184 bytes
2023-09-27T10:34:41.489+02:00 DEBUG [101]
org.apache.sshd.common.io.nio2.Nio2Session
suspendRead(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) requesting read suspension
2023-09-27T10:34:41.489+02:00 DEBUG [101]
org.apache.sshd.common.channel.RemoteWindow Consume
RemoteWindow[server](TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
by 151 down to 2097001
2023-09-27T10:34:41.489+02:00 DEBUG [101]
org.apache.sshd.client.session.ClientSessionImpl
encode(ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
packet #362 sending command=94[SSH_MSG_CHANNEL_DATA] len=160
2023-09-27T10:34:41.489+02:00 DEBUG [101]
org.apache.sshd.common.io.nio2.Nio2Session
writeBuffer(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52479,
remote=/127.0.0.1:8183]) writing 224 bytes
2023-09-27T10:34:41.490+02:00 DEBUG [101]
org.apache.sshd.common.io.nio2.Nio2Session
doReadCycle(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) suspending reading
2023-09-27T10:34:41.490+02:00 DEBUG [109]
org.apache.sshd.common.io.nio2.Nio2Session
resumeRead(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) resuming read
2023-09-27T10:34:41.494+02:00 DEBUG [110]
org.apache.sshd.client.session.ClientSessionImpl
doHandleMessage(ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
process #418 SSH_MSG_CHANNEL_DATA
2023-09-27T10:34:41.494+02:00 DEBUG [110]
org.apache.sshd.common.channel.LocalWindow Consume
LocalWindow[server](TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
by 201 down to 2096767
2023-09-27T10:34:41.494+02:00 DEBUG [110]
org.apache.sshd.server.forward.TcpipServerChannel
handleData(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
SSH_MSG_CHANNEL_DATA len=201
2023-09-27T10:34:41.494+02:00 DEBUG [110]
org.apache.sshd.common.io.nio2.Nio2Session
writeBuffer(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) writing 201 bytes
2023-09-27T10:34:41.495+02:00 DEBUG [103]
org.apache.sshd.client.session.ClientSessionImpl
doHandleMessage(ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
process #419 SSH_MSG_CHANNEL_DATA
2023-09-27T10:34:41.496+02:00 DEBUG [103]
org.apache.sshd.common.channel.LocalWindow Consume
LocalWindow[server](TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
by 6838 down to 2089929
2023-09-27T10:34:41.496+02:00 DEBUG [103]
org.apache.sshd.server.forward.TcpipServerChannel
handleData(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
SSH_MSG_CHANNEL_DATA len=6838
2023-09-27T10:34:41.496+02:00 DEBUG [103]
org.apache.sshd.common.io.nio2.Nio2Session
writeBuffer(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) writing 6838 bytes
2023-09-27T10:34:41.502+02:00 DEBUG [105]
org.apache.sshd.common.io.nio2.Nio2Session
suspendRead(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) requesting read suspension
2023-09-27T10:34:41.502+02:00 DEBUG [105]
org.apache.sshd.common.channel.RemoteWindow Consume
RemoteWindow[server](TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
by 93 down to 2096908
2023-09-27T10:34:41.502+02:00 DEBUG [105]
org.apache.sshd.client.session.ClientSessionImpl
encode(ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
packet #363 sending command=94[SSH_MSG_CHANNEL_DATA] len=102
2023-09-27T10:34:41.502+02:00 DEBUG [105]
org.apache.sshd.common.io.nio2.Nio2Session
writeBuffer(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52479,
remote=/127.0.0.1:8183]) writing 160 bytes
2023-09-27T10:34:41.502+02:00 DEBUG [105]
org.apache.sshd.common.io.nio2.Nio2Session
doReadCycle(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) suspending reading
2023-09-27T10:34:41.502+02:00 DEBUG [105]
org.apache.sshd.common.io.nio2.Nio2Session
resumeRead(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) resuming read
2023-09-27T10:34:46.494+02:00 DEBUG [107]
org.apache.sshd.client.session.ClientSessionImpl
doHandleMessage(ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
process #420 SSH_MSG_CHANNEL_CLOSE
2023-09-27T10:34:46.494+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel
handleClose(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
SSH_MSG_CHANNEL_CLOSE
2023-09-27T10:34:46.494+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel
handleClose(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
prevent sending EOF
2023-09-27T10:34:46.494+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel
close(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
Closing gracefully
2023-09-27T10:34:46.494+02:00 DEBUG [107]
org.apache.sshd.common.channel.LocalWindow Closing
LocalWindow[server](TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
2023-09-27T10:34:46.494+02:00 DEBUG [107]
org.apache.sshd.common.channel.RemoteWindow Closing
RemoteWindow[server](TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
2023-09-27T10:34:46.495+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel$1
close([TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183]]
cmd=SSH_MSG_CHANNEL_DATA) Closing gracefully
2023-09-27T10:34:46.495+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel
sendEof(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
already sent (state=Graceful)
2023-09-27T10:34:46.495+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel$1
close([TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183]]
cmd=SSH_MSG_CHANNEL_DATA][Graceful] - operationComplete() closed
2023-09-27T10:34:46.495+02:00 DEBUG [107]
org.apache.sshd.common.channel.AbstractChannel$GracefulChannelCloseable
close(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])[immediately=false]
processing
2023-09-27T10:34:46.495+02:00 DEBUG [107]
org.apache.sshd.common.channel.AbstractChannel$GracefulChannelCloseable
close(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])[immediately=false]
send SSH_MSG_CHANNEL_CLOSE
2023-09-27T10:34:46.495+02:00 DEBUG [107]
org.apache.sshd.client.session.ClientSessionImpl
encode(ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
packet #364 sending command=97[SSH_MSG_CHANNEL_CLOSE] len=5
2023-09-27T10:34:46.495+02:00 DEBUG [107]
org.apache.sshd.common.io.nio2.Nio2Session
writeBuffer(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52479,
remote=/127.0.0.1:8183]) writing 64 bytes
2023-09-27T10:34:46.496+02:00 DEBUG [107]
org.apache.sshd.common.channel.AbstractChannel$GracefulChannelCloseable
handleClosePacketWritten(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])[immediately=false]
SSH_MSG_CHANNEL_CLOSE written on channel
2023-09-27T10:34:46.496+02:00 DEBUG [107]
org.apache.sshd.client.session.ClientConnectionService
unregisterChannel(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
result=TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183]
2023-09-27T10:34:46.496+02:00 DEBUG [107]
org.apache.sshd.common.util.closeable.SequentialCloseable
doClose(org.apache.sshd.common.util.closeable.SequentialCloseable$1@3b9592b1)
signal close complete immediately=false
2023-09-27T10:34:46.496+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel$2
close(org.apache.sshd.server.forward.TcpipServerChannel$2@73ee1629) Closing
gracefully
2023-09-27T10:34:46.497+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel$2
close(org.apache.sshd.server.forward.TcpipServerChannel$2@73ee1629)[Graceful]
closed
2023-09-27T10:34:46.497+02:00 DEBUG [107]
org.apache.sshd.common.util.closeable.SequentialCloseable
doClose(org.apache.sshd.common.util.closeable.SequentialCloseable$1@53e2317c)
signal close complete immediately=false
2023-09-27T10:34:46.498+02:00 DEBUG [377]
org.apache.sshd.common.io.nio2.Nio2Connector
close(org.apache.sshd.common.io.nio2.Nio2Connector@641d6960) Closing gracefully
2023-09-27T10:34:46.498+02:00 DEBUG [378]
org.apache.sshd.common.io.nio2.Nio2Connector
close(org.apache.sshd.common.io.nio2.Nio2Connector@641d6960) Closing immediately
2023-09-27T10:34:46.498+02:00 DEBUG [377]
org.apache.sshd.common.io.nio2.Nio2Session
close(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) Closing gracefully
2023-09-27T10:34:46.498+02:00 DEBUG [378]
org.apache.sshd.common.io.nio2.Nio2Session
close(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) Closing immediately
2023-09-27T10:34:46.498+02:00 DEBUG [378]
org.apache.sshd.common.io.nio2.Nio2Session
doCloseImmediately(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) closing
socket=sun.nio.ch.WindowsAsynchronousSocketChannelImpl[connected
local=/[0:0:0:0:0:0:0:0]:52813 remote=localhost/127.0.0.1:8090]
2023-09-27T10:34:46.498+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel$1
close([TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183]]
cmd=SSH_MSG_CHANNEL_DATA)[Immediately] state already Closed
2023-09-27T10:34:46.498+02:00 DEBUG [107]
org.apache.sshd.common.channel.AbstractChannel$GracefulChannelCloseable
close(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])[immediately=true]
processing
2023-09-27T10:34:46.498+02:00 DEBUG [107]
org.apache.sshd.client.session.ClientConnectionService
unregisterChannel(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])
result=null
2023-09-27T10:34:46.498+02:00 DEBUG [107]
org.apache.sshd.common.util.closeable.SequentialCloseable
doClose(org.apache.sshd.common.util.closeable.SequentialCloseable$1@50be3a77)
signal close complete immediately=true
2023-09-27T10:34:46.499+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel$2
close(org.apache.sshd.server.forward.TcpipServerChannel$2@4b4ea763) Closing
immediately
2023-09-27T10:34:46.499+02:00 DEBUG [109]
org.apache.sshd.common.io.nio2.Nio2Session
handleReadCycleFailure(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) AsynchronousCloseException after 4996733800
nanos at read cycle=3: null
2023-09-27T10:34:46.499+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel$2
close(org.apache.sshd.server.forward.TcpipServerChannel$2@4b4ea763)[Immediately]
closed
2023-09-27T10:34:46.499+02:00 DEBUG [378]
org.apache.sshd.common.io.nio2.Nio2Session
doCloseImmediately(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090])
socket=sun.nio.ch.WindowsAsynchronousSocketChannelImpl[closed] closed
2023-09-27T10:34:46.499+02:00 DEBUG [107]
org.apache.sshd.common.util.closeable.SequentialCloseable
doClose(org.apache.sshd.common.util.closeable.SequentialCloseable$1@6467864c)
signal close complete immediately=true
2023-09-27T10:34:46.499+02:00 DEBUG [109]
org.apache.sshd.common.io.nio2.Nio2Session
close(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090])[Immediately] state already Immediate
2023-09-27T10:34:46.499+02:00 DEBUG [378]
org.apache.sshd.common.io.nio2.Nio2Connector unmapSession(id=188):
Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813, remote=localhost/127.0.0.1:8090]
2023-09-27T10:34:46.499+02:00 DEBUG [107]
org.apache.sshd.server.forward.TcpipServerChannel
close(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183]][Graceful]
- operationComplete() closed
2023-09-27T10:34:46.499+02:00 DEBUG [378]
org.apache.sshd.server.forward.TcpipServerChannel
close(TcpipServerChannel[id=87,
recipient=87]-ClientSessionImpl[vsa-23.4-2e720007-c417-40b9-acac-df96359a9204@/127.0.0.1:8183])[Graceful]
state already Closed
2023-09-27T10:34:46.499+02:00 DEBUG [378]
org.apache.sshd.common.io.nio2.Nio2Session
close(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090])[Immediately] closed
2023-09-27T10:34:46.499+02:00 DEBUG [378]
org.apache.sshd.common.io.nio2.Nio2Connector
close(org.apache.sshd.common.io.nio2.Nio2Connector@641d6960)[Immediately] closed
2023-09-27T10:34:46.499+02:00 INFO [377]
org.apache.sshd.common.io.nio2.Nio2Session
doCloseGracefully(Nio2Session[local=/[0:0:0:0:0:0:0:0]:52813,
remote=localhost/127.0.0.1:8090]) ClosedChannelException while shutting down
output: null
java.nio.channels.ClosedChannelException: null
at
sun.nio.ch.AsynchronousSocketChannelImpl.begin(AsynchronousSocketChannelImpl.java:118)
~[?:?]
at
sun.nio.ch.AsynchronousSocketChannelImpl.shutdownOutput(AsynchronousSocketChannelImpl.java:554)
~[?:?]
at
org.apache.sshd.common.io.nio2.Nio2Session.lambda$doCloseGracefully$0(Nio2Session.java:227)
~[sshd-core-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.Builder$1.doClose(Builder.java:47)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.SimpleCloseable.close(SimpleCloseable.java:63)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.SequentialCloseable$1.operationComplete(SequentialCloseable.java:56)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.SequentialCloseable$1.operationComplete(SequentialCloseable.java:45)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.future.AbstractSshFuture.lambda$notifyListener$2(AbstractSshFuture.java:162)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.threads.ThreadUtils.runAsInternal(ThreadUtils.java:68)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.future.AbstractSshFuture.notifyListener(AbstractSshFuture.java:161)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.future.DefaultSshFuture.addListener(DefaultSshFuture.java:166)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.SequentialCloseable$1.operationComplete(SequentialCloseable.java:57)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.SequentialCloseable$1.operationComplete(SequentialCloseable.java:45)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.SequentialCloseable.doClose(SequentialCloseable.java:69)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.SimpleCloseable.close(SimpleCloseable.java:63)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.io.nio2.Nio2Session.doCloseGracefully(Nio2Session.java:233)
~[sshd-core-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.AbstractCloseable.close(AbstractCloseable.java:110)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.ParallelCloseable.doClose(ParallelCloseable.java:65)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.SimpleCloseable.close(SimpleCloseable.java:63)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.AbstractInnerCloseable.doCloseGracefully(AbstractInnerCloseable.java:41)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.common.util.closeable.AbstractCloseable.close(AbstractCloseable.java:110)
~[sshd-common-2.9.2.jar:2.9.2]
at
org.apache.sshd.server.forward.TcpipServerChannel$2.lambda$doCloseGracefully$0(TcpipServerChannel.java:304)
~[sshd-core-2.9.2.jar:2.9.2]
at java.util.concurrent.FutureTask.run(FutureTask.java:264) [?:?]
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
[?:?]
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
[?:?]
at java.lang.Thread.run(Thread.java:833) [?:?]
```
### Other information
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