HI Williem, Camel , JSch Developers
I need compression to be set on the route as the remote server only offers
"zlib" as the compression algorithm. As I mentioned below, when compression
option is set on camel route, SftpOpertions does the below -
// compression
if (sftpConfig.getCompression() > 0) {
LOG.debug("Using compression: {}", sftpConfig.getCompression());
session.setConfig("compression.s2c", "z...@openssh.com, zlib,
none");
session.setConfig("compression.c2s", "z...@openssh.com, zlib,
none");
session.setConfig("compression_level",
Integer.toString(sftpConfig.getCompression()));
}
With this set up Jsch is not able to connect to the remote server.
I extended SftpOperations and used it with a custom component and endpoint
(extended from SftpComponent and SftpEndpoint respectively). I pass in the
compression algorithm as camel route option and set compression.s2c and
compression.c2s to the value passed. Observation -
When compression algorithm = z...@openssh.com, zlib, none -JSch fails to
connect (note spaces between algorithms)
When compression algorithm = z...@openssh.com,zlib,none -JSch connects
successfully (note no spaces between algorithms)
While this perhaps indicates a bug in JSch library, could I request a Camel
patch to remove the spaces when specifying compression algorithms? The change
should be localized to lines of codes in SftpOperations identified above.
Regards
Keshav
-----Original Message-----
From: Willem Jiang [mailto:willem.ji...@gmail.com]
Sent: Monday, October 20, 2014 2:39 PM
To: users@camel.apache.org
Subject: RE: Jsch issue with compression algorithm
Hi,
I just check the configuration, “none” means the compression will not be done
if sshd doesn’t support to compress the data from sshd to jsch.
Current release has supported following properties,
* compression.s2c: zlib, none
default: none
Specifies whether to use compression for the data stream
from sshd to jsch. If "zlib,none" is given and the remote sshd does
not allow the packet compression, compression will not be done.
Did you try to set the compression option to 0 ?
BTW, you can change the code to see if it works any way :)
--
Willem Jiang
Red Hat, Inc.
Web: http://www.redhat.com
Blog: http://willemjiang.blogspot.com (English) http://jnn.iteye.com (Chinese)
Twitter: willemjiang
Weibo: 姜宁willem
On October 20, 2014 at 12:33:45 PM, Baweja, Keshav
(keshav.baw...@jpmorgan.com.invalid) wrote:
> Looking at the code in SftpOperations.java in createSession()
>
> // compression
> if (sftpConfig.getCompression() > 0) { LOG.debug("Using compression:
> {}", sftpConfig.getCompression());
> session.setConfig("compression.s2c", "z...@openssh.com, zlib, none");
> session.setConfig("compression.c2s", "z...@openssh.com, zlib, none");
> session.setConfig("compression_level",
> Integer.toString(sftpConfig.getCompression()));
> }
>
> So, the JSch session is set with "z...@openssh.com, zlib, none" for
> "compression.s2c", even though z...@openssh.com might not be configured on
> sshd for server to client communication.
> Could this be causing the behavior I encounter below?
>
> Regards
> Keshav
>
>
> -----Original Message-----
> From: Baweja, Keshav
> Sent: Monday, October 20, 2014 12:17 PM
> To: users@camel.apache.org; jsch-us...@lists.sourceforge.net
> Subject: Jsch issue with compression algorithm
>
> Hello All,
>
> I have been able to narrow down this issue to below -
>
> 1) I enabled client to server compression configuration on Jsch by
> setting compression=2 as an option on camel route.
> 2) With this, Jsch sets client to server compression configuration as - JSCH
> -> kex: client:
> z...@openssh.com, zlib, none
> 3) When server is configured as below the sftp connection is
> successful JSCH -> kex: server: none,z...@openssh.com
> 4) However, if the server is configured as any of the below the sftp
> connection is not successful JSCH -> kex: server: none,zlib JSCH ->
> kex: server: zlib
>
> So if z...@openssh.com is not configured on server, Jsch fails with
> the exception below
>
> Caused by: com.jcraft.jsch.JSchException: Algorithm negotiation fail
> at com.jcraft.jsch.Session.receive_kexinit(Session.java:583)
> ~[ftu-server-3.0.3.jar:na] at
> com.jcraft.jsch.Session.connect(Session.java:320)
> ~[ftu-server-3.0.3.jar:na] at
> org.apache.camel.component.file.remote.SftpOperations.connect(SftpOper
> ations.java:115)
> ~[ftu-server-3.0.3.jar:na]
>
> Has someone encountered this? Any ideas to resolve this. Thanks in advance.
>
> Regards
> Keshav
>
> -----Original Message-----
> From: Baweja, Keshav [mailto:keshav.baw...@jpmorgan.com.INVALID]
> Sent: Friday, October 10, 2014 2:56 PM
> To: users@camel.apache.org; jsch-us...@lists.sourceforge.net
> Subject: RE: JSch connection issue with Maverick SSHD server
>
>
> Hello
>
> I am using Camel routing library to set up sftp routes to a remote
> sftp server. Camel user Jsch library (version 0.1.50) for all sftp
> operations and jsch-zlib (version 1.1.3) for the compression. However
> I encounter the exception below with this set up. Could someone advise/point
> to a resolution? Many thanks in advance.
>
> [2014-10-07 10:37:11.937] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] DEBUG
> org.apache.camel.component.file.remote.SftpOperations - Using private
> keyfile: /home/localuser/.ssh/id_rsa
> [2014-10-07 10:37:11.937] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] DEBUG
> org.apache.camel.component.file.remote.SftpOperations - Using
> knownhosts
> file: /home/localuser/.ssh/known_hosts
> [2014-10-07 10:37:12.018] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] DEBUG
> org.apache.camel.component.file.remote.SftpOperations - Using
> StrickHostKeyChecking:
> no
> [2014-10-07 10:37:12.018] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] DEBUG
> org.apache.camel.component.file.remote.SftpOperations - Using compression:
> 2
> [2014-10-07 10:37:12.018] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> Connecting to host port port
> [2014-10-07 10:37:12.150] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> Connection established
> [2014-10-07 10:37:12.279] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> Remote
> version
> string: SSH-2.0-Maverick_SSHD
> [2014-10-07 10:37:12.279] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> Local
> version
> string: SSH-2.0-JSCH-0.1.50
> [2014-10-07 10:37:12.279] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> CheckCiphers:
> aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3des
> -ctr,arcfour,arcfour128,arcfour256
> [2014-10-07 10:37:12.284] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> aes256-ctr is
> not available.
> [2014-10-07 10:37:12.284] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> aes192-ctr is
> not available.
> [2014-10-07 10:37:12.284] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> aes256-cbc is
> not available.
> [2014-10-07 10:37:12.285] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> aes192-cbc is
> not available.
> [2014-10-07 10:37:12.285] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> arcfour256 is
> not available.
> [2014-10-07 10:37:12.285] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> CheckKexes:
> diffie-hellman-group14-sha1
> [2014-10-07 10:37:12.308] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> SSH_MSG_KEXINIT sent
> [2014-10-07 10:37:12.308] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> SSH_MSG_KEXINIT received
> [2014-10-07 10:37:12.308] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha1
> [2014-10-07 10:37:12.308] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> ssh-rsa
> [2014-10-07 10:37:12.308] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> aes128-cbc,aes256-cbc,aes192-cbc,3des-cbc,twofish256-cbc,twofish192-cb
> c,twofish128-cbc,blowfish-cbc,cast128-cbc
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> aes128-cbc,aes256-cbc,aes192-cbc,3des-cbc,twofish256-cbc,twofish192-cb
> c,twofish128-cbc,blowfish-cbc,cast128-cbc
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> hmac-sha1,hmac-sha1-96
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> hmac-sha1,hmac-sha1-96
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> zlib
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> zlib
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: server:
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellman-
> group-exchange-sha1
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> ssh-rsa,ssh-dss
> [2014-10-07 10:37:12.309] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc
> [2014-10-07 10:37:12.310] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc
> [2014-10-07 10:37:12.310] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
> [2014-10-07 10:37:12.310] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
> [2014-10-07 10:37:12.310] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> z...@openssh.com, zlib, none
> [2014-10-07 10:37:12.310] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> z...@openssh.com, zlib, none
> [2014-10-07 10:37:12.310] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> [2014-10-07 10:37:12.310] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH -> kex: client:
> [2014-10-07 10:37:12.311] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] INFO
> org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> Disconnecting from host port port
> [2014-10-07 10:37:12.316] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] DEBUG
> org.apache.camel.component.file.remote.SftpConsumer - Could not connect
> to:Endpoint[sftp://user@host:port/data?compression=2&delay=70000&disconnect=false&include=filename_2014-10-06.xml&knownHostsFile=%2Fexport%2Fhome%2Flocaluser%2F.ssh%2Fknown_hosts&localWorkDirectory=%2Fexport%2Fhome%2Flocaluser%2FFTU%2Fserver%2Fwork%2F26&noop=true&pollStrategy=%23POLL_STRATEGY_ENDPOINT_16&privateKeyFile=%2Fexport%2Fhome%2Flocaluser%2F.ssh%2Fid_rsa&readLock=changed&readLockCheckInterval=5000&readLockTimeout=20000&reconnectDelay=60000&throwExceptionOnConnectFailed=true].
> Will try to recover.
> org.apache.camel.component.file.GenericFileOperationFailedException:
> Cannot connect to sftp://user@host:port at
> org.apache.camel.component.file.remote.SftpOperations.connect(SftpOper
> ations.java:143)
> ~[ftu-server-3.0.2.jar:na]
> at
> org.apache.camel.component.file.remote.RemoteFileConsumer.connectIfNec
> essary(RemoteFileConsumer.java:154)
> [ftu-server-3.0.2.jar:na]
> at
> org.apache.camel.component.file.remote.RemoteFileConsumer.recoverableC
> onnectIfNecessary(RemoteFileConsumer.java:133)
> [ftu-server-3.0.2.jar:na]
> at
> org.apache.camel.component.file.remote.RemoteFileConsumer.prePollCheck
> (RemoteFileConsumer.java:55)
> [ftu-server-3.0.2.jar:na]
> at
> org.apache.camel.component.file.GenericFileConsumer.poll(GenericFileCo
> nsumer.java:106)
> [ftu-server-3.0.2.jar:na]
> at
> org.apache.camel.impl.ScheduledPollConsumer.doRun(ScheduledPollConsume
> r.java:187)
> [ftu-server-3.0.2.jar:na]
> at
> org.apache.camel.impl.ScheduledPollConsumer.run(ScheduledPollConsumer.
> java:114)
> [ftu-server-3.0.2.jar:na]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471
> )
> [na:1.7.0_05]
> at
> java.util.concurrent.FutureTask$Sync.innerRunAndReset(FutureTask.java:
> 351)
> [na:1.7.0_05]
> at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:178)
> [na:1.7.0_05] at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.a
> ccess$301(ScheduledThreadPoolExecutor.java:178)
> [na:1.7.0_05]
> at
> java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.r
> un(ScheduledThreadPoolExecutor.java:293)
> [na:1.7.0_05]
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.j
> ava:1110)
> [na:1.7.0_05]
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.
> java:603)
> [na:1.7.0_05]
> at java.lang.Thread.run(Thread.java:722) [na:1.7.0_05] Caused by:
> com.jcraft.jsch.JSchException:
> Algorithm negotiation fail
> at com.jcraft.jsch.Session.receive_kexinit(Session.java:582)
> ~[ftu-server-3.0.2.jar:na] at
> com.jcraft.jsch.Session.connect(Session.java:320)
> ~[ftu-server-3.0.2.jar:na] at
> org.apache.camel.component.file.remote.SftpOperations.connect(SftpOper
> ations.java:115)
> ~[ftu-server-3.0.2.jar:na]
> ... 14 common frames omitted
> [2014-10-07 10:37:12.316] [Camel (camel-1) thread #0 -
> sftp://user@host:port/data] DEBUG
> org.apache.camel.component.file.remote.SftpConsumer - Trying to
> recover connection to:
> Endpoint[sftp://user@host:port/data?compression=2&delay=70000&disconne
> ct=false&include=filename_2014-10-06.xml&knownHostsFile=%2Fexport%2Fho
> me%2Flocaluser%2
> F.ssh%2Fknown_hosts&localWorkDirectory=%2Fexport%2Fhome%2Flocaluser%2F
> FTU%2Fserver%2Fwork%2F26&noop=true&pollStrategy=%23POLL_STRATEGY_ENDPO
> INT_16&privateKeyFile=%2Fexport%2Fhome%2Flocaluser%2F.ssh%2Fid_rsa&rea
> dLock=changed&readLockCheckInterval=5000&readLockTimeout=20000&reconne
> ctDelay=60000&throwExceptionOnConnectFailed=true]
> with a fresh client.
>
>
> Also debug output from unix sftp command (which connects successfully)
> is below –
>
> Connecting to host...
> debug1: Rhosts Authentication disabled, originating port will not be trusted.
> debug1: ssh_connect: needpriv 0
> debug1: Connecting to host [host] port port.
> debug1: Connection established.
> debug1: identity file /export/home/localuser/.ssh/id_rsa type 1
> debug1: identity file /export/home/localuser/.ssh/id_dsa type 2
> debug1: Logging to host: host
> debug1: Local user: localuser Remote user: user
> debug1: Remote protocol version 2.0, remote software version
> Maverick_SSHD
> debug1: no match: Maverick_SSHD
> debug1: Enabling compatibility mode for protocol 2.0
> debug1: Local version string SSH-2.0-Sun_SSH_1.1.6
> debug1: use_engine is 'yes'
> debug1: pkcs11 engine initialized, now setting it as default for RSA,
> DSA, and symmetric ciphers
> debug1: pkcs11 engine initialization complete
> debug1: Failed to acquire GSS-API credentials for any mechanisms (No
> credentials were supplied, or the credentials were unavailable or
> inaccessible Unknown code 0
> )
> debug1: SSH2_MSG_KEXINIT sent
> debug1: SSH2_MSG_KEXINIT received
> debug1: kex: server->client aes128-cbc hmac-sha1 zlib
> debug1: kex: client->server aes128-cbc hmac-sha1 zlib
> debug1: Peer sent proposed langtags, ctos:
> debug1: Peer sent proposed langtags, stoc:
> debug1: We proposed langtags, ctos: i-default
> debug1: We proposed langtags, stoc: i-default
> debug1: SSH2_MSG_KEX_DH_GEX_REQUEST sent
> debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
> debug1: dh_gen_key: priv key bits set: 157/320
> debug1: bits set: 523/1024
> debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
> debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
> debug1: Host 'host' is known and matches the RSA host key.
> debug1: Found key in /export/home/localuser/.ssh/known_hosts:19
> debug1: bits set: 528/1024
> debug1: ssh_rsa_verify: signature correct
> debug1: newkeys: mode 1
> debug1: set_newkeys: setting new keys for 'out' mode
> debug1: Enabling compression at level 6.
> debug1: SSH2_MSG_NEWKEYS sent
> debug1: expecting SSH2_MSG_NEWKEYS
> debug1: newkeys: mode 0
> debug1: set_newkeys: setting new keys for 'in' mode
> debug1: SSH2_MSG_NEWKEYS received
> debug1: done: ssh_kex2.
> debug1: send SSH2_MSG_SERVICE_REQUEST
> debug1: got SSH2_MSG_SERVICE_ACCEPT
>
> Regards
> Keshav
>
> -----Original Message-----
> From: Baweja, Keshav
> Sent: Tuesday, September 16, 2014 7:07 PM
> To: users@camel.apache.org
> Subject: RE: JSch connection issue with Maverick SSHD server
>
> Hello
>
> JSch has configuration parameters to set compression algorithm for
> client to server and server to client transport.
>
> compression.c2s
> Compression algorithms for client-to-server transport. The default is
> "none", but this library also supports "zlib" and "z...@openssh.com".
> (Other compression algorithms can't be put in, it seems.)
>
> compression.s2c
> Compression algorithms for server-to-client transport. The default is
> "none", but this library also supports "zlib" and "z...@openssh.com".
> (Other compression algorithms can't be put in, it seems.)
>
> Is it possible to set this configuration parameter in Options part of Camel
> URI?
>
> The only Option I could see on Camel's FTP2 page is below -
> compression | Default Value = 0 | SFTP Only: Camel 2.8.3/2.9: To use
> compression. Specify a level from 1 to 10. Important:
> You must manually add the needed JSCH zlib JAR to the classpath for
> compression support.
>
>
> Does setting this Camel option (with JSch zlib on classpath)
> automatically sets both these configuration parameters.
>
>
>
> Regards
> Keshav
>
>
> -----Original Message-----
> From: Baweja, Keshav [mailto:keshav.baw...@jpmorgan.com.INVALID]
> Sent: Monday, September 15, 2014 2:30 PM
> To: users@camel.apache.org
> Subject: RE: JSch connection issue with Maverick SSHD server
>
> Thanks for your reply Nodet,
>
> The sftp server is hosted externally and is outside our
> infrastructure. I can't make any changes to the server, and need to make
> client work with the server configuration.
> Would you know how I can do it, found the below on Camel's ftp2 page
> and guess need to look at this -
>
> compression | Default Value = 0 | SFTP Only: Camel 2.8.3/2.9: To use
> compression. Specify a level from 1 to 10. Important: You must
> manually add the needed JSCH zlib JAR to the classpath for compression
> support.
>
> Regards
> Keshav
>
>
> -----Original Message-----
> From: Guillaume Nodet [mailto:gno...@apache.org]
> Sent: Monday, September 15, 2014 2:15 PM
> To: users@camel.apache.org
> Subject: Re: JSch connection issue with Maverick SSHD server
>
> Your server is configured with "zlib" compression only, while the
> client only supports compression "none", so there's a mismatch and
> both can't talk to each other. You need to configure the server with both
> "zlib" *and* "none" compression factories.
>
> 2014-09-15 7:39 GMT+02:00 Baweja, Keshav > >:
>
> > Hello
> >
> > I am using Camel 2.13.2 in my application to build up routes to
> > download files from sftp server locations. The codebase has been
> > tested ok against 5 different sftp servers. However against one
> > particular sftp server, JSch the sftp implementation used by Camel
> > seems to disconnect immediately after connecting. Could you please
> > advise what could be the issue here. The log from application is as
> > below -
> >
> > [2014-09-15 05:52:32.236] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] DEBUG
> > org.apache.camel.component.file.remote.SftpOperations - Using
> > private
> > keyfile: /home/.ssh/id_rsa
> > [2014-09-15 05:52:32.238] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] DEBUG
> > org.apache.camel.component.file.remote.SftpOperations - Using
> > knownhosts file: /home/.ssh/known_hosts
> > [2014-09-15 05:52:32.329] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] DEBUG
> > org.apache.camel.component.file.remote.SftpOperations - Using
> > StrickHostKeyChecking: no
> > [2014-09-15 05:52:32.329] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> > Connecting to hostname port port
> > [2014-09-15 05:52:32.462] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> > Connection established
> > [2014-09-15 05:52:32.589] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> > Remote version string: SSH-2.0-Maverick_SSHD
> > [2014-09-15 05:52:32.589] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> > Local version string: SSH-2.0-JSCH-0.1.50
> > [2014-09-15 05:52:32.589] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> > CheckCiphers:
> > aes256-ctr,aes192-ctr,aes128-ctr,aes256-cbc,aes192-cbc,aes128-cbc,3d
> > es
> > -ctr,arcfour,arcfour128,arcfour256
> > [2014-09-15 05:52:32.598] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> > CheckKexes: diffie-hellman-group14-sha1
> > [2014-09-15 05:52:32.621] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> > SSH_MSG_KEXINIT sent
> > [2014-09-15 05:52:32.621] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> > SSH_MSG_KEXINIT received
> > [2014-09-15 05:52:32.622] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server:
> > diffie-hellman-group1-sha1,diffie-hellman-group-exchange-sha1
> > [2014-09-15 05:52:32.622] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server: ssh-rsa
> > [2014-09-15 05:52:32.622] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server:
> > aes128-cbc,aes256-cbc,aes192-cbc,3des-cbc,twofish256-cbc,twofish192-
> > cb c,twofish128-cbc,blowfish-cbc,cast128-cbc
> > [2014-09-15 05:52:32.622] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server:
> > aes128-cbc,aes256-cbc,aes192-cbc,3des-cbc,twofish256-cbc,twofish192-
> > cb c,twofish128-cbc,blowfish-cbc,cast128-cbc
> > [2014-09-15 05:52:32.622] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server: hmac-sha1,hmac-sha1-96
> > [2014-09-15 05:52:32.622] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server: hmac-sha1,hmac-sha1-96
> > [2014-09-15 05:52:32.622] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server: zlib
> > [2014-09-15 05:52:32.622] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server: zlib
> > [2014-09-15 05:52:32.622] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server:
> > [2014-09-15 05:52:32.623] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > server:
> > [2014-09-15 05:52:32.623] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client:
> > diffie-hellman-group1-sha1,diffie-hellman-group14-sha1,diffie-hellma
> > n-
> > group-exchange-sha1
> > [2014-09-15 05:52:32.623] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client: ssh-rsa,ssh-dss
> > [2014-09-15 05:52:32.623] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client:
> > aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc,aes192-cbc,aes2
> > 56
> > -cbc
> > [2014-09-15 05:52:32.623] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client:
> > aes128-ctr,aes128-cbc,3des-ctr,3des-cbc,blowfish-cbc,aes192-cbc,aes2
> > 56
> > -cbc
> > [2014-09-15 05:52:32.623] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
> > [2014-09-15 05:52:32.623] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client: hmac-md5,hmac-sha1,hmac-sha2-256,hmac-sha1-96,hmac-md5-96
> > [2014-09-15 05:52:32.623] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client: none
> > [2014-09-15 05:52:32.623] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client: none
> > [2014-09-15 05:52:32.624] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client:
> > [2014-09-15 05:52:32.624] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations
> - JSCH -> kex:
> > client:
> > [2014-09-15 05:52:32.624] [Camel (camel-1) thread #0 -
> > sftp://user@hostname:port/data] INFO
> > org.apache.camel.component.file.remote.SftpOperations - JSCH ->
> > Disconnecting from hostname port port
> >
> > Regards
> > Keshav
> >
> >
> >
> > Regards
> > Keshav
> >
> >
> >
> > This email is confidential and subject to important disclaimers and
> > conditions including on offers for the purchase or sale of
> > securities, accuracy and completeness of information, viruses,
> > confidentiality, legal privilege, and legal entity disclaimers,
> > available at http://www.jpmorgan.com/pages/disclosures/email.
> >
>
> This email is confidential and subject to important disclaimers and
> conditions including on offers for the purchase or sale of securities,
> accuracy and completeness of information, viruses, confidentiality,
> legal privilege, and legal entity disclaimers, available at
> http://www.jpmorgan.com/pages/disclosures/email.
>
> This email is confidential and subject to important disclaimers and
> conditions including on offers for the purchase or sale of securities,
> accuracy and completeness of information, viruses, confidentiality,
> legal privilege, and legal entity disclaimers, available at
> http://www.jpmorgan.com/pages/disclosures/email.
>
> This email is confidential and subject to important disclaimers and
> conditions including on offers for the purchase or sale of securities,
> accuracy and completeness of information, viruses, confidentiality,
> legal privilege, and legal entity disclaimers, available at
> http://www.jpmorgan.com/pages/disclosures/email.
>
This email is confidential and subject to important disclaimers and conditions
including on offers for the purchase or sale of securities, accuracy and
completeness of information, viruses, confidentiality, legal privilege, and
legal entity disclaimers, available at
http://www.jpmorgan.com/pages/disclosures/email.
