[Sqlrelay-discussion] Possible hang at receiveFileDescriptor (rudiments)

[Georgiy K. <ge...@st...>]

Hi,

In some cases sqlr-connection will hang at this call: result=recvmsg(pvt-
>_fd,&messageheader,0); (filedescriptor.cpp:1876, 
filedescriptor::receiveFileDescriptor) - this is gdb backtrace. 
Before this safePoll(120,0,false,true) is called, but it wait POLLOUT event 
instead of POLLIN (read(false) and write(true) params). In this case, when 
sqlr-listener fail before passFileDescriptor, sqlr-connect will hang.

I think, correct call is safePoll(120,0,true,false) - we should wait POLLIN 
event.

I test this solution, and in my case have no problem.