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Editorial Team
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Asked: 2026-05-25T18:25:48+00:00

Trying to setup replication from gerrit to my github repo. Getting this stacktrace: [2011-09-20

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Trying to setup replication from gerrit to my github repo. Getting this stacktrace:

[2011-09-20 00:11:58,470] ERROR com.google.gerrit.server.git.PushReplication : Cannot replicate to git@github.com:myuser/myrepo.git
org.eclipse.jgit.errors.TransportException: git@github.com:myuser/myrepo.git: Session.connect: java.net.SocketTimeoutException: Read timed out
at org.eclipse.jgit.transport.JschConfigSessionFactory.getSession(JschConfigSessionFactory.java:138)
at org.eclipse.jgit.transport.SshTransport.getSession(SshTransport.java:121)
at org.eclipse.jgit.transport.TransportGitSsh$SshFetchConnection.(TransportGitSsh.java:248)
at org.eclipse.jgit.transport.TransportGitSsh.openFetch(TransportGitSsh.java:147)
at com.google.gerrit.server.git.PushOp.listRemote(PushOp.java:358)
at com.google.gerrit.server.git.PushOp.generateUpdates(PushOp.java:312)
at com.google.gerrit.server.git.PushOp.pushVia(PushOp.java:258)
at com.google.gerrit.server.git.PushOp.runImpl(PushOp.java:213)
at com.google.gerrit.server.git.PushOp.run(PushOp.java:166)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:206)
at com.google.gerrit.server.git.WorkQueue$Task.run(WorkQueue.java:324)
at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:662)

Caused by: com.jcraft.jsch.JSchException: Session.connect: java.net.SocketTimeoutException: Read timed out
at com.jcraft.jsch.Session.connect(Session.java:504)
at org.eclipse.jgit.transport.JschConfigSessionFactory.getSession(JschConfigSessionFactory.java:128)

My config files are as follows:

replication.config:

[remote "github"]
url = git@github.com:myuser/${name}.git
push = +refs/heads/*:refs/heads/*
push = +refs/tags/*:refs/tags/*
timeout = 5
replicationDelay = 0
authGroup = Administrators

secure.config:

[database]
    password = secret
[ssh]
    file = /home/gerrit2/.ssh/config

.ssh/config:

Host github.com:
  IdentityFile ~/.ssh/id_rsa
  PreferredAuthentications publickey

I tried running 

ssh -i etc/ssh_host_dsa_key git@github.com
ssh -i etc/ssh_host_rsa_key git@github.com
ssh -i ~/.ssh/id_rsa git@github.com
ssh -i ~/.ssh/id_dsa  git@github.com

and was able to “hit” github so the keys are imported OK, not sure what the problem is,
any suggestions appreciated.

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1 Answer

  1. Editorial Team

    As the name of the exception SocketTimeoutException says (and its documentation details):

    Signals that a timeout has occurred on a socket read or accept.

    Looking in the documentation of Gerrit’s replication.config:

    remote.<name>.timeout

    Number of seconds to wait for a network read or write to complete before giving up and declaring the remote side
    is not responding. If 0, there is no timeout, and the push client waits indefinitely.

    A timeout should be large enough to mostly transfer the objects to the other side. 1 second may be too small
    for larger projects, especially over a WAN link, while 10-30 seconds is a much more reasonable timeout value.

    Defaults to 0 seconds, wait indefinitely.

    Your value is 5 seconds, you could try it with a larger value instead.

    (The problem is only indirectly related to JSch – JSch’s Session.connect(int) will simply take the timeout parameter and pass it on to the Socket it creates. That reminds me that I should document which unit this timeout is for JSch – seconds or milliseconds.)

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