Come risolvere gli rrrori riportati su file error log ?

[WillerCT]

Salve a tutti, ho notato che il file error_log generato dal mio sito, realizzato con Joomla vers. 2.5.27, è pieno zeppo di messaggi d'errore.

Essendo io un neofita del linguaggio php, chiedo aiuto a voi per risolvere tali problemi. Tengo a precisare che il grafico input/output usage che mi viene fornito dal servizio hosting è costantemente al limite massimo.

Il sito sembra funzionare bene, io personalmente rilevo un pò di lentezza, tuttavia effettuando il test con pagespeed il punteggio che ottengo è buono. Aggiungo che ieri sera sul tardi ho ricevuto un messaggio d'errore 508 che è sparito dopo circa 5 minuti.

Riporto di seguito alcuni dei messaggi del file error log.

[22-Oct-2014 00:11:33 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_200_150_16777215_00_images_guide_tecnica_la-saldatura-a-stagno_bobina_filo_stagno.jpg.iptc_caption.txt): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1527

[22-Oct-2014 00:44:50 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_140_0_16777215_00_images_news-moto_novita_moto_2015_yamaha-wr250f_foto-yamaha-wr250f-my-2015_din-005.jpg.size): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1531

[22-Oct-2014 00:44:50 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_140_0_16777215_00_images_news-moto_novita_moto_2015_yamaha-wr250f_foto-yamaha-wr250f-my-2015_din-006.jpg.size): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1531

[22-Oct-2014 00:44:51 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_140_0_16777215_00_images_news-moto_novita_moto_2015_yamaha-wr250f_foto-yamaha-wr250f-my-2015_din-007.jpg.size): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1531

[22-Oct-2014 00:44:52 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_140_0_16777215_00_images_news-moto_novita_moto_2015_yamaha-wr250f_foto-yamaha-wr250f-my-2015_din-009.jpg.size): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1531

[22-Oct-2014 19:12:51 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/libraries/joomla/database/database/mysql.php on line 383

[22-Oct-2014 19:13:02 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/components/com_content/models/articles.php on line 497

[22-Oct-2014 19:13:02 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/modules/mod_articles_category/helper.php on line 192

[22-Oct-2014 19:34:03 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/libraries/joomla/database/database/mysql.php on line 383

[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in /home/cdlesetm/public_html/libraries/joomla/database/database/mysql.php on line 293

[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/components/com_banners/models/banners.php on line 180

[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/components/com_banners/models/banners.php on line 203

[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/modules/mod_banners/tmpl/default.php on line 20

[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: mysql_num_rows() expects parameter 1 to be resource, boolean given in /home/cdlesetm/public_html/libraries/joomla/database/database/mysql.php on line 293

[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/components/com_banners/models/banners.php on line 180

[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/components/com_banners/models/banners.php on line 203

[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/modules/mod_banners/tmpl/default.php on line 20

[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/components/com_content/models/articles.php on line 497
[22-Oct-2014 19:34:04 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/modules/mod_articles_category/helper.php on line 192

[22-Oct-2014 21:24:25 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_140_0_16777215_00_images_news-moto_novita_moto_2015_mv-agusta-brutale-800-dragster-rr_mv-agusta-brutale-800-dragster-rr_002.jpg.size): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1531

[22-Oct-2014 21:54:50 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/components/com_content/models/articles.php on line 497

[22-Oct-2014 21:54:50 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/modules/mod_lofarticlesslideshow/helper.php on line 140

[22-Oct-2014 21:54:50 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/modules/mod_lofarticlesslideshow/tmpl/default.php on line 1

[22-Oct-2014 21:54:50 Europe/Berlin] PHP Warning: Invalid argument supplied for foreach() in /home/cdlesetm/public_html/modules/mod_lofarticlesslideshow/tmpl/default.php on line 1

[22-Oct-2014 22:40:51 Europe/Berlin] PHP Warning: PHP Startup: Unable to load dynamic library '/usr/local/lib/php/extensions/no-debug-non-zts-20100525/rar.so' - /usr/local/lib/php/extensions/no-debug-non-zts-20100525/rar.so: cannot open shared object file: No such file or directory in Unknown on line 0

[23-Oct-2014 12:54:17 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_800_600_0_10_images_news-moto_motomondiale_casco_jorge_lorenzo_montmelo2013 .jpg.iptc_caption.txt): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1527

[23-Oct-2014 12:54:17 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_500_312_16777215_00_images_news-moto_motomondiale_casco_jorge_lorenzo_montmelo2013 .jpg.iptc_caption.txt): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1527

[23-Oct-2014 12:54:17 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_500_312_16777215_00_images_news-moto_motomondiale_casco_jorge_lorenzo_montmelo2013 .jpg.size): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1531

[24-Oct-2014 13:28:29 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_140_0_16777215_00_images_news-moto_novita_moto_2015_ducati-scrambler_ducati-scrambler-logo.jpg.size): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1531

[26-Oct-2014 09:47:57 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_800_600_0_10_images_news-moto_novita_moto_2014_mv-agusta-brutale-800-dragster_mv-agusta-brutale-800-dragster-2014-02.jpg.iptc_caption.txt): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1527

[27-Oct-2014 14:03:32 Europe/Berlin] PHP Warning: Illegal string offset 'efdfbf4fde98686e05e4c29196be5aa5' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:03:32 Europe/Berlin] PHP Warning: Illegal string offset 'e6f7482e767e320711293a7fe9d0227e' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:03:32 Europe/Berlin] PHP Warning: Illegal string offset 'b7702761a06c478e8f4ecf849052660a' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:03:32 Europe/Berlin] PHP Warning: Illegal string offset 'eeaab82e477cbc62bfe7cdbadc354011' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:03:32 Europe/Berlin] PHP Warning: Illegal string offset 'b7702761a06c478e8f4ecf849052660a' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:03:32 Europe/Berlin] PHP Warning: Illegal string offset 'eeaab82e477cbc62bfe7cdbadc354011' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:04:10 Europe/Berlin] PHP Warning: Illegal string offset 'ffff7a03493bfa2c065e8ae1f6a51438' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:04:10 Europe/Berlin] PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 1631615491 bytes) in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:05:41 Europe/Berlin] PHP Warning: Illegal string offset 'ffff7a03493bfa2c065e8ae1f6a51438' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:05:41 Europe/Berlin] PHP Fatal error: Allowed memory size of 268435456 bytes exhausted (tried to allocate 1631615491 bytes) in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:08:56 Europe/Berlin] PHP Warning: Illegal string offset 'a5debbd50a1eb022c0495ad82e4bc316' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:08:56 Europe/Berlin] PHP Warning: Illegal string offset '84568e880c05445ea5ce3b8c709f87b2' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:08:56 Europe/Berlin] PHP Warning: Illegal string offset 'c9cc11d2ed923261845cc8b56e2b58f2' in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 14:08:56 Europe/Berlin] PHP Warning: Illegal string offset: -2017193270 in /home/cdlesetm/public_html/libraries/joomla/document/html/html.php on line 363

[27-Oct-2014 22:06:20 Europe/Berlin] PHP Warning: file_get_contents(/home/cdlesetm/public_html/cache/multithumb_thumbs/b_800_600_0_10_images_guide_recensioni_atomotoretr o-2014_automotoretro_2014_035.JPG.size): failed to open stream: No such file or directory in /home/cdlesetm/public_html/plugins/content/multithumb/multithumb.php on line 1531

[Al_katraz984]

conosci l'inglese?

failed to open stream: No such file or directory

l'apertura dello stream è fallita: Non ci sono file o directory nel percorso specificato che si chiamano come specificato..

[WillerCT]

questo uno...e gli altri ?

[clasku]

Sinceramente, non mi ci metterei a fixare tutti gli errori di joomla
Comunque, devi andare replicare l'errore e capire dal codice cosa sbaglia. Per i file è semplice, per gli altri errori un po' più complesso

[WillerCT]

Ma io vorrei capire se tali errori sono gravi e cosa possono comportare in termini di prestazioni del sito. Magari se è il caso e può essere utile sono disposto a fornire link al sito, ma preferirei farlo in privato.