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Re: [EP-tech] Internal Server error 500 opening view items, Saved searches and Users + Error in Script

Hi Zen,

Looking at the logs (snippet below), it appears as though you have a user record, whose "preference" field, which is stored as a serialized data structure cannot be "thawed" (i.e. converted back into a data structure and loaded as a variable).

[Wed Jan 17 15:31:32.685957 2024] [:error] [pid 5485:tid 140036888565312] Too large size > I32_MAX at /usr/lib/x86_64-linux-gnu/perl/5.34/Storable.pm line 471, at /usr/lib/x86_64-linux-gnu/perl/5.34/Storable.pm line 474.\n\tStorable::thaw("\\x{5}\\x{8}\\x{3}\\x{0}\\x{0}\\x{0}\\x{1}\\x{4}\\x{2}\\x{0}\\x{0}\\x{0}\\x{8}\\x{a}\\x{5}inbox\\x{a}\\x{0}\\x{a}\\x{6}buffer\\x{a}\\x{0}\\x{a}\\x{7}archive\\x{a}\\x{0}\\x{a}\\x{8}deletion\\x{8}\\x{c2}\\x{81}\\x{0}\\x{0}\\x{0}\\x{1b}S"...) called at /opt/eprints3/perl_lib/EPrints/MetaField/Storable.pm line 129\n\tEPrints::MetaField::Storable::thaw(EPrints::MetaField::Storable=HASH(0x5572c76fd0d0), EPrints::Repository=HASH(0x5572c7d5ea88), "\\x{5}\\x{8}\\x{3}\\x{0}\\x{0}\\x{0}\\x{1}\\x{4}\\x{2}\\x{0}\\x{0}\\x{0}\\x{8}\\x{a}\\x{5}inbox\\x{a}\\x{0}\\x{a}\\x{6}buffer\\x{a}\\x{0}\\x{a}\\x{7}archive\\x{a}\\x{0}\\x{a}\\x{8}deletion\\x{8}\\x{c2}\\x{81}\\x{0}\\x{0}\\x{0}\\x{1b}S"...) called at /opt/eprints3/perl_lib/EPrints/MetaField/Storable.pm line 71

The issue seems to relate to this field being too large (more than 2^32, approx. 4 billion bytes).  I am not sure how this field could have got anywhere near this large, as the "preference" field is usually a few hundred characters/bytes at most.  I suspect this issue also explains the "[error in script]" error messages you are getting on the back on some abstract pages for the "Depositing User".  If you know which user deposited these eprint records then that will be the one causing the issue.  There of course may be more than one user with this issue (although I can see you only have a couple of dozen users in total).  If you could login to MySQL and run the following query on the user table, this may help identify the user or users causing this problem.

SELECT userid, LENGTH(preference) AS pref_size FROM user ORDER BY pref_size;


David Newman

On 17/01/2024 07:35, zen zenitram wrote:
CAUTION: This e-mail originated outside the University of Southampton.

On Tue, Jan 16, 2024 at 4:57 PM David R Newman <drn@ecs.soton.ac.uk> wrote:
Hi Zen,

The internal server error page is not very useful at debugging the problem.  You will need to look in your webserver error logs.  On Red Hat Linux based systems this is usually /var/log/httpd/error_log or /var/log/httpd/ssl_error_log.  On Debian/Ubuntu based Linux this will likely be /var/log/apache2/error.log.  I would recommend loading one of these pages showing an internal server errors whilst tailing the error log file, e.g.

tail -f /var/log/apache2/error.log

and see what error messages you get.  If you do not see an error message, check if there are any other error log files you can tail, as Apache configuration can modify where errors are logged.

Once you have the error message from tailing the logs, post it back to this list and I will see if I can further advise.  One quick thing I might try first is ensuring the database schema for your EPrints is up to date by running:

EPRINTS_PATH/bin/epadmin update ARCHIVE_ID


David Newman

On 16/01/2024 7:00 am, zen zenitram wrote:
CAUTION: This e-mail originated outside the University of Southampton.
CAUTION: This e-mail originated outside the University of Southampton.
I have a problem in some of the documents in my eprints repository


Item Type:           Thesis (Masters)

Additional Information: MT LANG & LIT 5 1989

Subjects:              P Language and Literature > P Philology. Linguistics

P Language and Literature > PN Literature (General)

Users:   College of Liberal Arts and Communication > CLA Graduate Studies

Depositing User:               [error in script]

Date Deposited: 05 Jul 2016 03:54

Last Modified:   05 Jul 2016 03:54

URI:       http://thesis.dlsud.edu.ph/id/eprint/4190

Actions (login required)

It did not show Depositing user ( error in script)

when i tried to click view item, it give Internal server error 500

Internal Server Error

The server encountered an internal error or misconfiguration and was unable to complete your request.

Please contact the server administrator at aklatan@dlsud.edu.ph to inform them of the time this error occurred, and the actions you performed just before this error.

More information about this error may be available in the server error log.

Attached also the error when opening saved searches and users

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