OS: Ubuntu 10.10 x64 all updates as of this am. But problem has persisted for days now.
Laz/FPC: Today's trunk

worker thread running issues a call to fpSend with iSend Bytes in buffer
        Try
RSRP^.LastCall:=Sockets.fpSend(RSRP^.Info.Socket,@FSendBuffer[0],iSend,0);
        except
          on E:Exception do
OnRSRException('TRSRManager.cb_RSR_Send','Exception',E.Message);
        end;

FPC/srtl/linux/x86_64/syscall.inc

line 319 fails but execption is raised in 320.

line 319: syscall { Do the system call. } line 320: cmpq $-4095, %rax { Check %rax for error. }

I had exception handling inside the block but it was not caught.

Anyone else having problems with sockets on Unix. This problem does not exist on Windows. After the first occurance of this issue, all network engine activity fails across other threads too with exceptions at this very spot.

Any help would be greatly appreciated.

It would help if you could say what the exception exactly is ?

Michael.

Michael Van Canneyt wrote

It would help if you could say what the exception exactly is ?

Thanks Michael,

Well all I see is a SIGPIPE exception. As stated before the actual FPC exception was not raised (or the except block was not executed) in there so I can't even log the error. Does that help?

Yes.

This is a Unix signal (and not an exception in the pascal sense) which is not caught by the FPC rtl. You should (when sending data to your socket) add the MSG_NOSIGNAL flag to fpSend (on Unix).

Have a look in fcl-web/src/base/custfcgi.pp to see how we do this.

(and look on internet for the meaning of the MSG_NOSIGNAL flag :) )

Michael.

Thanks Michael. That did the trick. But sooner or later I'm going to need to switch from polling to events...