euLog Collector crashes after start

[RPeschke]

I have tried running the newest version of EUDAQ on the NI crate. the GUI version of the log collector crashed immediately with the following error

###### listenaddress=tcp://192.168.2.2:44002
       logfile=../logs/2014-02-23.log
Error: Uncaught exception: Deserialize asked for 1363231829, only have 18
  From ..\..\..\main\lib\src\BufferSerializer.cc:21
  In eudaq::BufferSerializer::Deserialize
LogThread is dying...

i tried the command line version it worked fine.

[RPeschke]

the problem is in

status.cc
function
Status::Status(Deserializer & ds){
..
ds.read(m_msg);
..
}

it tries to Deserializer a the status string.

so it just takes 4 letters from this string interprets them as numbers and reserves this much space. but in the Deserializer(ds) ther are only 18 bytes left. this it what causes the problem.

[RPeschke]

it seams to be some sort of race condition

I increased the sleep time for the command reciever from 1 ms to 500 and after this the error did not accoured anymore. I am not very happy about this solution but for now it seems to work

void CommandReceiver::OnIdle() {
mSleep(500);
}

[hperrey]

@RPeschke thanks for looking into this, it really sounds like a serious issue! I've opened up two new issues since this sort of race condition has been seen in other producers as well and is a more general problem.

If you could please make a PR will your workaround, this should do for now; I would then close this issue and move the investigation to issues #35 and #36.

[hperrey]

This will be "worked-around" with commit 4fba77f that is part of PR #39 -- when we have merged this into master, I will close this issue and we go forward with the release of 1.2; for the next release we should actually fix this (see issues cited above).