Mail Archives: cygwin/2009/01/26/11:29:44
On Mon, Jan 26, 2009 at 03:28:15PM +0100, Corinna Vinschen wrote:
>On Jan 26 02:43, Christopher Faylor wrote:
>> I finally managed to duplicate this.
>> [...]
>> >It's already on my list to investigate. When I saw "broken pipe" I
>> >thought it could be something in the new pipe code.
>>
>> But, if it is, I can't see it yet.
>>
>> The strace snippet below seems to show that the ssh process which scp
>> forks is expecting for the socket to become writable but that never happens.
>>
>> At time 10048910 you can see 16384 bytes received. Then select() is
>> called to inspect the socket handler for readability/writability. But
>> select claims that the socket handle is never ready.
>
>It's probably right about that. The peek_socket function is called in a
>loop by the thread_socket function (via select) with a non INFINITE
>timeout. The "Broken pipe" message already occured at the time the
>peek_socket function is repeated ad infinitum. This message in the
>strace does not mean that SSH hangs for that reason, it just doesn't get
>any data from the remote side. SSH maintains a select loop over all
>open descriptors and every poll from the thread_socket function
>generates this debug message. SSH seems to be waiting for data from the
>local pipe to the local scp actually.
Ok. I was pretty sure that I hadn't seen a broken pipe message at this
point but I could be mistaken.
Btw, in an unrelated problem, the reason that I didn't look into this
earlier was because my normal system for debugging this problem can no
longer connect to sourceware.org. I am not running a firewall or any
BLODA but it seems to hang in the initial connect and never recover.
1.5.25 works fine. It is just sourceware.org which seems to have
this problem, which is weird.
I assume that if 1.7 goes live I won't be the only one with this problem.
I guess I should start a new thread to discuss it.
cgf
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