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From "Klaas Prause (JIRA)" <j...@apache.org>
Subject [jira] Commented: (IVY-1075) Publish with SSH (sftp or ssh) prevents enclosing java process to terminate
Date Mon, 18 May 2009 07:58:45 GMT

    [ https://issues.apache.org/jira/browse/IVY-1075?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12710301#action_12710301
] 

Klaas Prause commented on IVY-1075:
-----------------------------------

I have a thread dump from the process:

Full thread dump Java HotSpot(TM) Client VM (11.0-b15 mixed mode, sharing):

"DestroyJavaVM" prio=10 tid=0xb4f99c00 nid=0x1a59 waiting on condition [0x00000000..0xb7df0060]
   java.lang.Thread.State: RUNNABLE

"Connect thread ivy session" prio=10 tid=0xb4f9cc00 nid=0x1a71 runnable [0xb4bfe000..0xb4bfef20]
   java.lang.Thread.State: RUNNABLE
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.read(SocketInputStream.java:129)
	at com.jcraft.jsch.IO.getByte(IO.java:82)
	at com.jcraft.jsch.Session.read(Session.java:809)
	at com.jcraft.jsch.Session.run(Session.java:1193)
	at java.lang.Thread.run(Thread.java:619)

"Low Memory Detector" daemon prio=10 tid=0xb5400c00 nid=0x1a5f runnable [0x00000000..0x00000000]
   java.lang.Thread.State: RUNNABLE

"CompilerThread0" daemon prio=10 tid=0x09818000 nid=0x1a5e waiting on condition [0x00000000..0xb55e3a58]
   java.lang.Thread.State: RUNNABLE

"Signal Dispatcher" daemon prio=10 tid=0x09816800 nid=0x1a5d waiting on condition [0x00000000..0x00000000]
   java.lang.Thread.State: RUNNABLE

"Finalizer" daemon prio=10 tid=0x09810400 nid=0x1a5c in Object.wait() [0xb582b000..0xb582bea0]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x733313b0> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:116)
	- locked <0x733313b0> (a java.lang.ref.ReferenceQueue$Lock)
	at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:132)
	at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:159)

"Reference Handler" daemon prio=10 tid=0x0980bc00 nid=0x1a5b in Object.wait() [0xb592c000..0xb592ce20]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <0x73331438> (a java.lang.ref.Reference$Lock)
	at java.lang.Object.wait(Object.java:485)
	at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:116)
	- locked <0x73331438> (a java.lang.ref.Reference$Lock)

"VM Thread" prio=10 tid=0x0980a000 nid=0x1a5a runnable 

"VM Periodic Task Thread" prio=10 tid=0xb5402c00 nid=0x1a60 waiting on condition 

JNI global references: 935

Heap
 def new generation   total 2112K, used 1964K [0x70c80000, 0x70ec0000, 0x732f0000)
  eden space 1920K,  98% used [0x70c80000, 0x70e5ac68, 0x70e60000)
  from space 192K,  34% used [0x70e60000, 0x70e706f0, 0x70e90000)
  to   space 192K,   0% used [0x70e90000, 0x70e90000, 0x70ec0000)
 tenured generation   total 27400K, used 16688K [0x732f0000, 0x74db2000, 0x90080000)
   the space 27400K,  60% used [0x732f0000, 0x7433c338, 0x7433c400, 0x74db2000)
 compacting perm gen  total 21504K, used 21328K [0x90080000, 0x91580000, 0x94080000)
   the space 21504K,  99% used [0x90080000, 0x91554200, 0x91554200, 0x91580000)
    ro space 8192K,  74% used [0x94080000, 0x94673488, 0x94673600, 0x94880000)
    rw space 12288K,  58% used [0x94880000, 0x94f8db20, 0x94f8dc00, 0x95480000)



> Publish with SSH (sftp or ssh) prevents enclosing java process to terminate
> ---------------------------------------------------------------------------
>
>                 Key: IVY-1075
>                 URL: https://issues.apache.org/jira/browse/IVY-1075
>             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
(ESTABLISHED)
> java      23589       klaas   32u     sock        0,4              342501 can't identify
protocol
> 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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