From: David Rodriguez <david.francisco.rodriguez@...>
Date: 2010-04-23T06:40:25+09:00
Subject: Re: Ruby 1.91.376 hangs when launched with python pExpect

Hi Roger

I am using ruby Readline as:
while @logout == false
  cmd =Readline::readline('>',true)
  process_command(cmd) if !cmd.nil?
end

adn it works fine when running independently but not when running from 
the pExpect. So I changed to use jsut stdin.gets as:

while @logout == false
  print ">"
  $stdout.flush
  process_command($stdin.gets)
end

and it seems to be working now. But what I saw is that my program has 
between 10 to 40 threads and the ones that have packets to dequeue are 
waiting on
the __lll_lock_wait. So those threads looks like they are out of the 
select but somehow they are stuck in this lock_wait.

Thanks

David


#0  0x00d32410 in __kernel_vsyscall()
#1  0x00b45509 in __lll_lock_wait () from  lib/libpthread.so.0
#2  0x00b40bbf in _L_lock_885 () from /lib/libpthread.so.0
#3  0x00b40a86 in pthread_mutex_lock () from /lib/libpthread.so.0
#4  0x0811daae in native_mutex_lock (lock=0xfffffffc) at 
thread_pthread.c:36
#5  0x081225d2 in do_select (n=7, read=0x9856938, write=0x0, except=0x0, 
timeout=0x0) at thread.c:984
#6  0x0812279c in rb_thread_wait_fd_rw (fd=6, read=1) at thread.c:2475
#7  0x00861827 in s_recvfrom (sock=<value optimized out>, argc=<value 
optimized out>, argv=<value optimized out>, from=RECV_IP)
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