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From "Klaas Prause (JIRA)" <>
Subject [jira] Commented: (IVY-1075) Publish with SSH (sftp or ssh) prevents enclosing java process to terminate
Date Mon, 18 May 2009 08:30:45 GMT


Klaas Prause commented on IVY-1075:

>From the thread dump the operation blocks in JSch library. The Session class has one thread
for the connection and blocks inside the run method trying to read bytes from the server.
The read method is documented as blocking till bytes can be read, end of file is encountered
or an exception is thrown.

I cannot say if the Session from jsch is the problem or the way ivy uses the library. I do
not understand the difference between normal use via Ant and the use via Buildr an Antwrap.

> Publish with SSH (sftp or ssh) prevents enclosing java process to terminate
> ---------------------------------------------------------------------------
>                 Key: IVY-1075
>                 URL:
>             Project: Ivy
>          Issue Type: Bug
>    Affects Versions: 2.1.0-RC1
>         Environment: buildr 1.3.4 running on jruby 1.2.0 with latest jsch-0.1.41 jar
>            Reporter: Klaas Prause
> We try to add ivy support to buildr. Buildr comes with an AntWrap gem to call Ant targets
from within a buildr script:
> 1. using a standard publish via Antwrap using the same parameters that work in Ant
> 2. the publish works all artifacts are copied and the buildr script continues till its
end, but the buildr java process does not terminate!
> when publishing to a local repository the process terminates fine, so it has something
to do with the SSH connection.
> using lsof and checking the open file handles the process has an open connection to the
repository via SSH and some other open sockets (lsof output for process):
> [...]
> java      23589       klaas   31u     IPv6     342503                 TCP brackel.local:43473->argon:ssh
> java      23589       klaas   32u     sock        0,4              342501 can't identify
> java      23589       klaas   11u     unix 0xf5744a80              342386 socket
> [...]
> I checked out the source but could not find the problem. My best guess is that the last
SSH connection is cached within SshCache and never disconnected from Ivy.
> This is a blocker to change from ANT to Buildr, because the build scripts do not terminate
normally so they cannot be used in the integration server.
> We have the same problem with an hanging jruby script using Ivy not via Ant but via the
Ivy class to resolve projects. The Ivy class is instantiated from within JRuby and used to
resolve ivy.xmls to get some information about projects. The script does not terminate after
a resolve against a remote repository using SSH has been done.

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