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Remote hung up unexpectedly on clone repository [message #1852598]

Thu, 26 May 2022 06:19

Eclipse User

I have clone problem of SSH repositories with newest JGit versions 6.1.0.202203080745-r and 5.13.0.202109080827-r.

Git.cloneRepository().setURI("ssh://...").call() always throws exception org.eclipse.jgit.api.errors.TransportException: ssh://...: remote hung up unexpectedly

JGit version 5.6.1.202002131546-r clones same repository without problems.

Command line "git clone ssh://..." with same repository completed successfully.

What is wrong?

Re: Remote hung up unexpectedly on clone repository [message #1852614 is a reply to message #1852598]

Fri, 27 May 2022 05:57

Eclipse User

Impossible to say. Not enough information.

Possible duplicate of https://www.eclipse.org/forums/index.php?t=msg&th=1109789 . What kind of server is this cloning from?

Try adding setTagOption(TagOpt.FETCH_TAGS).

Re: Remote hung up unexpectedly on clone repository [message #1852616 is a reply to message #1852614]

Fri, 27 May 2022 08:10

Eclipse User

>What kind of server is this cloning from?

bitbucket.org

ssh://git@bitbucket.org/...

>Try adding setTagOption(TagOpt.FETCH_TAGS).

result is same

Re: Remote hung up unexpectedly on clone repository [message #1852617 is a reply to message #1852616]

Fri, 27 May 2022 08:18

Eclipse User

I suspected it might be Bitbucket Cloud. They have configured their SSH in a somewhat non-standard, restricted way. They only allow a single SSH channel to be opened in an SSH session. JGit sometimes uses two SSH channels sequentially.

The problem does not occur with command-line git because that delegates all SSH work to the external SSH executable, and thus creates two successive SSH sessions for that case.

Re: Remote hung up unexpectedly on clone repository [message #1852622 is a reply to message #1852617]

Fri, 27 May 2022 10:33

Eclipse User

But the old version of JGit works well with BitBucket.
Can you make the new one work too?

Re: Remote hung up unexpectedly on clone repository [message #1852627 is a reply to message #1852622]

Fri, 27 May 2022 16:37

Eclipse User

Hmmm... there was another problem with bitbucket if JGit used JSch for SSH caused by a bug in JSch. If you're using JSch, switch to using the Apache MINA sshd integration.

Re: Remote hung up unexpectedly on clone repository [message #1852635 is a reply to message #1852627]

Sat, 28 May 2022 14:38

Eclipse User

Thank you.
As I understand, I must to call SshSessionFactory.setInstance() with alternative SshSessionFactory.
Where can I find sample of create SshSessionFactory for Apache MINE sshd?

Re: Remote hung up unexpectedly on clone repository [message #1852641 is a reply to message #1852635]

Sun, 29 May 2022 08:33

Eclipse User

A very simple setup is in org.eclipse.jgit.pgm.TextBuiltIn.execute(). Other setups are shown in the org.eclipse.jgit.ssh.apache.test bundle. If you need to configure your factory in special ways, there is a SshdSessionFactoryBuilder that makes this somewhat easier.

Re: Remote hung up unexpectedly on clone repository [message #1852647 is a reply to message #1852641]

Sun, 29 May 2022 15:02

Eclipse User

Thank you.
Clone bitbucket repository with Apache MINE sshd terminated successfully with some strange console messages.

getOrCreateProvider(BC) created instance of org.bouncycastle.jce.provider.BouncyCastleProvider
getOrCreateProvider(EdDSA) created instance of net.i2p.crypto.eddsa.EdDSASecurityProvider
No detected/configured IoServiceFactoryFactory using Nio2ServiceFactoryFactory
handleUnknownRequest(ClientConnectionService[JGitClientSession[git@bitbucket.org/104.192.141.1:22]]) unknown global request: keepalive@conker
handleUnknownRequest(ClientConnectionService[JGitClientSession[git@bitbucket.org/104.192.141.1:22]]) unknown global request: keepalive@conker
handleUnknownRequest(ClientConnectionService[JGitClientSession[git@bitbucket.org/104.192.141.1:22]]) unknown global request: keepalive@conker
handleUnknownRequest(ClientConnectionService[JGitClientSession[git@bitbucket.org/104.192.141.1:22]]) unknown global request: keepalive@conker

Re: Remote hung up unexpectedly on clone repository [message #1852661 is a reply to message #1852647]

Mon, 30 May 2022 10:29

Eclipse User

The first three messages are prefectly fine, just telling you what Apache MINA sshd uses as defaults.

The four handleUnknownRequets messages are probably https://issues.apache.org/jira/browse/SSHD-1237 . In any case they're harmless.

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