Connection reset by peer: socket write error

[cliviu]

After some session inactivity time (about 15 minutes), I got these stack traces in log. What can I do to avoid them ?

2018-07-19 10:09:02,647|PacketReader |INFO |PacketReader error, got exception.
com.hierynomus.protocol.transport.TransportException: java.net.SocketException: Connection reset
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpPacketReader.doRead(DirectTcpPacketReader.java:53)
at com.hierynomus.smbj.transport.PacketReader.readPacket(PacketReader.java:69)
at com.hierynomus.smbj.transport.PacketReader.run(PacketReader.java:47)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpPacketReader.readFully(DirectTcpPacketReader.java:70)
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpPacketReader.readTcpHeader(DirectTcpPacketReader.java:59)
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpPacketReader.doRead(DirectTcpPacketReader.java:48)
... 3 more

2018-07-19 10:09:02,660|Session |ERROR|Caught exception while closing TreeConnect with id: 1
com.hierynomus.protocol.transport.TransportException: java.net.SocketException: Connection reset by peer: socket write error
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpTransport.write(DirectTcpTransport.java:77)
at com.hierynomus.smbj.connection.Connection.send(Connection.java:265)
at com.hierynomus.smbj.session.Session.send(Session.java:262)
at com.hierynomus.smbj.share.TreeConnect.close(TreeConnect.java:65)
at com.hierynomus.smbj.share.Share.close(Share.java:91)
at com.hierynomus.smbj.session.Session.logoff(Session.java:211)
at com.hierynomus.smbj.session.Session.close(Session.java:244)
at com.hierynomus.smbj.connection.Connection.close(Connection.java:136)
at com.hierynomus.smbj.connection.Connection.close(Connection.java:121)
at com.hierynomus.smbj.connection.Connection.handleError(Connection.java:428)
at com.hierynomus.smbj.transport.PacketReader.run(PacketReader.java:53)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(Unknown Source)
at java.net.SocketOutputStream.write(Unknown Source)
at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
at java.io.BufferedOutputStream.flush(Unknown Source)
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpTransport.write(DirectTcpTransport.java:74)
... 11 more
2018-07-19 10:09:02,660|Connection |WARN |Exception while closing session 1271036582559821
com.hierynomus.protocol.transport.TransportException: java.net.SocketException: Connection reset by peer: socket write error
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpTransport.write(DirectTcpTransport.java:77)
at com.hierynomus.smbj.connection.Connection.send(Connection.java:265)
at com.hierynomus.smbj.session.Session.send(Session.java:262)
at com.hierynomus.smbj.session.Session.logoff(Session.java:217)
at com.hierynomus.smbj.session.Session.close(Session.java:244)
at com.hierynomus.smbj.connection.Connection.close(Connection.java:136)
at com.hierynomus.smbj.connection.Connection.close(Connection.java:121)
at com.hierynomus.smbj.connection.Connection.handleError(Connection.java:428)
at com.hierynomus.smbj.transport.PacketReader.run(PacketReader.java:53)
at java.lang.Thread.run(Unknown Source)
Caused by: java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(Unknown Source)
at java.net.SocketOutputStream.write(Unknown Source)
at java.io.BufferedOutputStream.flushBuffer(Unknown Source)
at java.io.BufferedOutputStream.flush(Unknown Source)
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpTransport.write(DirectTcpTransport.java:74)
... 9 more

[neoxpert]

As far as I know - at least on windows based shares - there is a 15 minutes auto disconnect timeout for idle connections. To prevent the server to close your connection you could try to send keep alive (or echo) requests.

This should be possible by using SMB2Echo packets, which are already implemented in smbj.

[cliviu]

hi @neoxpert , do you know how to send SMB2Echo packets using the existing API ?

[neoxpert]

Something like this should work, but I do not know if that is "the clean way".

SMB2Echo echo = new SMB2Echo(SMB2Dialect.SMB_2_0_2);

session.send(echo);

[hierynomus]

I'll add a keepalive mechanism that can be configured (on/off)

[cliviu]

thanks !

[mtamassia]

@hierynomus I think can easily send a PR for the Keepalive. Before I spend time on it, let me know if you have already done anything with it.

I was going to modify SMBConfig to allow for enabling/disabling keepalive with a default of disabled.
Then modify the AsyncDirectTcpTransport and DirectTcpTransport constructors to include boolean soKeepalive and use .setOption to enable/disable keepalive.

Please let me know if you agree with the approach and if I am missing anywhere else in the code where keepalive needs to be set.

[nddipiazza]

@mtamassia @hierynomus did you work on this? we are getting bitten by this as well.

[dharmesh-khandelwal]

Any updates on this issue? @hierynomus
Is there any keepalive mechanism?
What value should I give to timeouts that can be configured in SmbjConfig?

[Flemoz]

So is this still in the works? @hierynomus

[SowjanyaKowkuntla]

@hierynomus Any updates on this issue , how to use keepalive mechanism, we are facing same issue.

[pts-aut]

Anthing new on this ? we're facing the same issue:
[2022-02-04T07:17:29,616] ERROR session.Session - Caught exception while closing TreeConnect with id: 1
com.hierynomus.protocol.transport.TransportException: java.net.SocketException: Broken pipe (Write failed)
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpTransport.write(DirectTcpTransport.java:71) ~[smbj-0.3.0.jar:?]
at com.hierynomus.smbj.connection.Connection.send(Connection.java:240) ~[smbj-0.3.0.jar:?]
at com.hierynomus.smbj.session.Session.send(Session.java:208) ~[smbj-0.3.0.jar:?]
at com.hierynomus.smbj.share.TreeConnect.close(TreeConnect.java:61) ~[smbj-0.3.0.jar:?]
at com.hierynomus.smbj.share.Share.close(Share.java:90) ~[smbj-0.3.0.jar:?]
at com.hierynomus.smbj.session.Session.logoff(Session.java:157) [smbj-0.3.0.jar:?]
at com.hierynomus.smbj.session.Session.close(Session.java:190) [smbj-0.3.0.jar:?]
at com.hierynomus.smbj.connection.Connection.close(Connection.java:128) [smbj-0.3.0.jar:?]
at com.hierynomus.smbj.connection.Connection.close(Connection.java:113) [smbj-0.3.0.jar:?]
at com.hierynomus.smbj.connection.Connection.handleError(Connection.java:404) [smbj-0.3.0.jar:?]
at com.hierynomus.smbj.transport.PacketReader.run(PacketReader.java:53) [smbj-0.3.0.jar:?]
at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.net.SocketException: Broken pipe (Write failed)
at java.net.SocketOutputStream.socketWrite0(Native Method) ~[?:?]
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:110) ~[?:?]
at java.net.SocketOutputStream.write(SocketOutputStream.java:150) ~[?:?]
at java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81) ~[?:?]
at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142) ~[?:?]
at com.hierynomus.smbj.transport.tcp.direct.DirectTcpTransport.write(DirectTcpTransport.java:69) ~[smbj-0.3.0.jar:?]
... 11 more

[vjorge]

Hello,
Any updates on this issue? Facing the same problem :(.

Many thanks for the help.