Capture C++ Exception

HDF5 Library C++ Users' Group
1

I have been trying to capture an error that has bee showing up in my syslog (Not that this is a python script that calls a C++ Class):

Sep 3 13:42:27 awdn1 python3[9414]: HDF5-DIAG: Error detected in HDF5 (1.10.0-patch1) thread 139689250795008:
Sep 3 13:42:27 awdn1 python3[9414]: #000: …/…/…/src/H5F.c line 579 in H5Fopen(): unable to open file
Sep 3 13:42:27 awdn1 python3[9414]: major: File accessibilty
Sep 3 13:42:27 awdn1 python3[9414]: minor: Unable to open file
Sep 3 13:42:27 awdn1 python3[9414]: #001: …/…/…/src/H5Fint.c line 1168 in H5F_open(): unable to lock the file or initialize file structure
Sep 3 13:42:27 awdn1 python3[9414]: major: File accessibilty
Sep 3 13:42:27 awdn1 python3[9414]: minor: Unable to open file
Sep 3 13:42:27 awdn1 python3[9414]: #002: …/…/…/src/H5FD.c line 1821 in H5FD_lock(): driver lock request failed
Sep 3 13:42:27 awdn1 python3[9414]: major: Virtual File Layer
Sep 3 13:42:27 awdn1 python3[9414]: minor: Can’t update object
Sep 3 13:42:27 awdn1 python3[9414]: #003: …/…/…/src/H5FDsec2.c line 939 in H5FD_sec2_lock(): unable to flock file, errno = 11, error message = ‘Resource temporarily unavailable’
Sep 3 13:42:27 awdn1 python3[9414]: major: File accessibilty
Sep 3 13:42:27 awdn1 python3[9414]: minor: Bad file ID accessed

So far for my program I have tried:

catch(H5::FileIException &err) { std::cout << err.getDetailMsg() << std::endl;}
catch(H5::DataSetIException &err) {std::cout << err.getDetailMsg() << std::endl;}
catch(H5::DataSpaceIException &err) {std::cout << err.getDetailMsg() << std::endl;}

That did not output the above HDF5-DIAG error. What code do I need to get the catch to grab and print this error?

2

Hello,

H5::FileIException should do it, but how about H5::Exception? Also, please
try print just some text to make sure, in case getDetailMsg() didn’t do what
we expect.

Thanks,

3

So yah, I did do some prints to make sure what error was being returned. What was given was:

FileIException
H5Fopen failed

I’ll look into H5::Exception and see if it will capture anything else. I’m also going to add printError() and see that that gives me.

4

Ah, I see what you wanted to print. Sorry for not getting it!

By any chance, did you have this statement somewhere at the beginning
of your code?
Exception::dontPrint();

Since it did print H5Fopen failed, don’t worry about trying H5::Exception.

5

I do not have to exception in the code

6

I’m not sure what you meant by that, but “Exception::dontPrint()” will turn off the automatic error printing, so I thought, perhaps, your code or some code it is linked to might call that.

7

Sorry didnt mean to seem glib. I searched all my code and did not find any calls to dontPrint(). Would dontPrint() keep Exception from printing to syslog as well?

8

Let me find out some more and get back to you.

Binh-Minh

9

I haven’t been able to capture any other errors other than “H5Fopen failed”. If the error above in the OP is not part of printError() or getDetailMsg() in the H5::Exception class then what is it from?

10

I’m sorry, it’s been a while… The error messages came from the C library.