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From Scott Smith <scott.sm...@gmail.com>
Subject Re: segfault in libprocess (slave)
Date Wed, 09 May 2012 15:56:17 GMT
I've had numerous other segfaults in libprocess, mostly in
std::map/rbtree code.  Is it possible that SocketManager::accepted is
missing a synchronized(this) {} block?

from process.cpp:

Socket SocketManager::accepted(int s)
{
  return sockets[s] = Socket(s);
}

On Mon, May 7, 2012 at 11:40 PM, Scott Smith <scott.smith@gmail.com> wrote:
> I've encountered another segfault in the slave.  This time, nothing
> unusual was happening.  Single framework / single user.  Four slaves,
> one master, framework run from master.
>
> version:
> svn Revision: 1334534 + proposed fix for MESOS-190:
> https://reviews.apache.org/r/5057/diff/2/#index_header
>
> log messages:
> I0508 06:35:21.458798   828 slave.cpp:447] Got assigned task 8:864:0
> for framework 201205080535222558218-5050-29475-0004
> I0508 06:35:21.459225   829 slave.cpp:689] Got acknowledgement of
> status update for task 8:863:0 of framework
> 201205080535222558218-5050-29475-0004
> F0508 06:35:21.459432   832 process.cpp:1772] Check failed:
> sockets.count(s) > 0
>
> stack trace:
> #0  0x00007f0aecdf0445 in raise () from /lib/x86_64-linux-gnu/libc.so.6
> #1  0x00007f0aecdf3bab in abort () from /lib/x86_64-linux-gnu/libc.so.6
> #2  0x00007f0aedd65dd9 in google::DumpStackTraceAndExit () at
> src/utilities.cc:145
> #3  0x00007f0aedd5ed9d in google::LogMessage::Fail () at src/logging.cc:1256
> #4  0x00007f0aedd6152f in google::LogMessage::SendToLog (this=0x7f0ae8a71c60)
>    at src/logging.cc:1216
> #5  0x00007f0aedd5e99b in google::LogMessage::Flush (this=0x7f0ae8a71c60)
>    at src/logging.cc:1088
> #6  0x00007f0aedd61dbd in google::LogMessageFatal::~LogMessageFatal (
>    this=0x7f0ae8a71c60, __in_chrg=<optimized out>) at src/logging.cc:1777
> #7  0x00007f0aedc93a55 in process::SocketManager::next(int) ()
>   from /home/ubuntu/cr/lib/libmesos-0.9.0.so
> #8  0x00007f0aedc8e119 in process::send_data(ev_loop*, ev_io*, int) ()
>   from /home/ubuntu/cr/lib/libmesos-0.9.0.so
> #9  0x00007f0aedd9e6ef in ev_invoke_pending (loop=0x7f0aee119240) at ev.c:1971
> #10 0x00007f0aedda2a24 in ev_loop (loop=0x7f0aee119240, flags=<optimized out>)
>    at ev.c:2333
> #11 0x00007f0aedc8f30d in process::serve(void*) ()
>   from /home/ubuntu/cr/lib/libmesos-0.9.0.so
> #12 0x00007f0aed17ee9a in start_thread () from
> /lib/x86_64-linux-gnu/libpthread.so.0
> #13 0x00007f0aeceac4bd in clone () from /lib/x86_64-linux-gnu/libc.so.6
> #14 0x0000000000000000 in ?? ()
>
> --
>         Scott



-- 
        Scott

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