Re: [JSch-users] SCP File transfer not completing

[Stefan R. <do...@dr...>]

I think I'm having a similar problem; a file transfer just stalls and 
nothing happens after that. Only around 1000 bytes are transferred.

I tried to debug and fix the problem myself, but the architecture of 
JSch is pretty complex, so right now I'm trying other SFTP packages.

-Stefan

Greg Hengeli wrote:

> Has anyone run across the problem of a large file transfer not 
> completing?  The program just seems to hang in apparent deadlock.  I 
> ran some tests and got a javacore dump from a program that was hanging 
> and this is what I found:
>
> "main" (TID:0x300EB9B8, sys_thread_t:0x3000EE28, state:CW, native 
> ID:0x1) prio=5
>          at java.lang.Object.wait(Native Method)
>          at 
> java.io.PipedInputStream.receive(PipedInputStream.java(Compiled Code))
>          at 
> java.io.PipedInputStream.receive(PipedInputStream.java(Compiled Code))
>          at 
> java.io.PipedOutputStream.write(PipedOutputStream.java(Compiled Code))
>          at 
> com.mayco.qm.batch.TestSendScp.sendFile(TestSendScp.java(Compiled Code))
>
> "Thread-6" (TID:0x300EABF8, sys_thread_t:0x651306A8, state:CW, native 
> ID:0x1419) prio=5
>          at java.lang.Thread.sleep(Native Method)
>          at com.jcraft.jsch.Session.write(Unknown Source)
>          at com.jcraft.jsch.ChannelExec.run(Unknown Source)
>          at java.lang.Thread.run(Thread.java:568)
>
> "Thread-5" (TID:0x300EAC50, sys_thread_t:0x6553CE28, state:R, native 
> ID:0x1318) prio=5
>          at java.net.SocketInputStream.socketRead0(Native Method)
>          at 
> java.net.SocketInputStream.read(SocketInputStream.java(Compiled Code))
>          at com.jcraft.jsch.IO.getByte(Unknown Source)
>          at com.jcraft.jsch.Session.read(Unknown Source)
>          at com.jcraft.jsch.Session.run(Unknown Source)
>          at java.lang.Thread.run(Thread.java:568)
>
> I don't have much experience with analyzing java dumps but it looks to 
> me like the main is waiting on the channel and the channel is 
> sleeping.  If anyone has any help or ideas that would be great.  Thanks!