>
>
>> 1. I've read (here and elsewhere) that Julia does an implicit block
>> while waiting for data. Is there a workaround?
>>
>> Do the blocking read asynchronously in a task. For network I/O (but not
> file), `read` will only block at the task level. To end the read, `close`
> the socket from another task.
>
Only a call to @async eof(conn) works as an asynchronous task; I'm not sure
how that's going to help, except in the REPL. Any other attempt to read
remotely is a segmentation fault that destroys the worker.
*Example (test function)*
@everywhere readSL(conn) = begin
while true
eof(conn)
tmp = read(conn.buffer, UInt8, 520)
end
end
Test call
julia> remotecall(6, readSL, conn);
julia>
signal (11): Segmentation fault
uv_read_start at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown
line)
start_reading at stream.jl:850
wait_readnb at stream.jl:373
eof at stream.jl:96
readSL at none:4
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown
line)
jl_f_apply at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown
line)
anonymous at multi.jl:920
run_work_thunk at multi.jl:661
run_work_thunk at multi.jl:670
jlcall_run_work_thunk_21322 at (unknown line)
jl_apply_generic at /usr/bin/../lib/x86_64-linux-gnu/julia/libjulia.so (unknown
line)
anonymous at task.jl:58
unknown function (ip: 0x7f1d162898cc)
unknown function (ip: (nil))
Worker 6 terminated.
ERROR (unhandled task failure): EOFError: read end of file
in read at stream.jl:929
in message_handler_loop at multi.jl:878
in process_tcp_streams at multi.jl:867
in anonymous at task.jl:63
Am I doing something fundamentally wrong here?
