** Using WeBWorK **

"upgrading" to Ubuntu 14.04 LTS with the Apache 2.4.7 has caused us many problems. So far we have fixed most of them by changing to the development branch of webwork 2.9, and upgrading everything. But there is one problem that just never goes away:

The function read_whole_problem_file fails erratically. Sometimes it works for a while, sometimes it doesn't, sometimes rebooting the web server cures the problem, sometimes it doesn't. This is a big headache because the problem database includes many links from one file to another, apparently to reduce the number of duplicates, but this seems to depend on read_whole_problem_file working reliably.

Here is an example of that type of error.

ERROR caught by Translator while processing problem file:rochesterLibrary/setInt
egrals15ByParts/bennyparts1.pg
****************
ERRORS from evaluating PG file:
Undefined subroutine &main::read_whole_problem_file called at [PG]/macros/PG.pl
line 661
Died within main::includePGproblem called at line 10 of (eval 1760)



****************

------Input Read
1 # This file is just a pointer to the file
2 #
3 # "Library/Union/setIntByParts/bennyparts1.pg"
4 #
5 # You may want to change your problem set to use that problem
6 # directly, especially if you want to make a copy of the problem
7 # for modification.
8
9 DOCUMENT();
10 includePGproblem("Library/Union/setIntByParts/bennyparts1.pg");
11 ENDDOCUMENT();
12
13 ## These tags keep this problem from being added to the NPL database
14 ##
15 ## DBsubject('ZZZ-Inserted Text')
16 ## DBchapter('ZZZ-Inserted Text')
17 ## DBsection('ZZZ-Inserted Text')

-----

Here is an example of a similar error that doesn't seem to be caused by
links to a duplicate problem

ERROR caught by Translator while processing problem file:Library/Union/setIntRie
mannSums/an6_4_34_left.pg
****************
ERRORS from evaluating PG file:
Undefined subroutine &main::read_whole_problem_file called at line 27 of [TMPL]
/Library/macros/Union/unionInclude.pl
Died within main::includePGfile called at line 45 of (eval 1023)



****************

------Input Read
1 ## DESCRIPTION
2 ## Calculus: Riemann Sums
3 ## ENDDESCRIPTION
4
5 ## Tagged by cmd6a 8/9/06
6
7 ## DBsubject(Calculus - single variable)
8 ## DBchapter(Techniques of integration)
9 ## DBsection(Approximation)
10 ## Date(8/23/07)
11 ## Institution(Union College)
12 ## Author(K. Lesh)
13 ## MLT(approx_02)
14 ## Level(2)
15 ## MO(1)
16 ## TitleText1('Calculus')
17 ## AuthorText1('Anton')
18 ## EditionText1('7')
19 ## Section1('6.4')
20 ## Problem1('34')
21 ## TitleText2('Calculus: Early Transcendentals')
22 ## AuthorText2('Rogawski')
23 ## EditionText2('1')
24 ## Section2('5.1')
25 ## Problem2('19')
26 ## KEYWORDS('calculus','integration','riemann sums')
27
28 DOCUMENT(); # This should be the first executable line in the problem.
29
30 loadMacros(
31 "PGstandard.pl",
32 "PGunion.pl", # Union College utilities
33 "MathObjects.pl",
34 "unionInclude.pl", # Utilities for included files
35 "PGcourse.pl", # Customization file for the course
36 );
37
38 TEXT(beginproblem());
39
40 ###################################
41 # Setup
42
43 # The following file defines the function to be used
44
45 includePGfile("an6_4_34-define-function-text.pg");
46
47 # $offset (if present) is a number between 0 and 1 that
48 # indicates where within each interval, the point should
49 # be taken. E.g., 0 = left-end, .5 = midpoint, 1 = right-end.
50 # The default is 0.
51
52 $offset = 0; #use left endpoints
53
54 ###################################
55 # Main text
56
57 #The following file generates the problem text for each
58 #Riemann sum estimate.
59
60 includePGfile("riemann-sum-estimate-text.pg");
61
62 ###################################
63 # Answers
64
65 $showPartialCorrectAnswers = 1;
66
67 #The $ans is included from the files above
68
69 ANS(Real($ans)->cmp);
70
71 ###################################
72
73
74 COMMENT('MathObject version');
75 ENDDOCUMENT();

-----

Is there a fix for this or should we just dump Ubuntu 14.04 and apache2.4 and rebuild the server with something else?

Thanks for any help you can give,

George
--
George Jennings, Math Dept., Calif. State University, Dominguez Hills