Plesk login URL is loading blank page. PHP Warning: psasem_lock() failed for semnum 35

Created:

2016-11-16 12:43:59 UTC

Modified:

2017-06-16 00:02:28 UTC

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Plesk login URL is loading blank page. PHP Warning: psasem_lock() failed for semnum 35

Applicable to:

  • Plesk 12.5 for Linux
  • Plesk 11.0 for Linux

Symptoms

1) Plesk login URL is loading blank page.

2) Sw-cp-server logs show error:

    # less /var/log/sw-cp-server/error.log:

System error 2: No such file or directory

0: Unix.php:343
Service_Node_Components_Unix->_syncProperties(NULL null, boolean false)
1: :
call_user_func_array(array, array)
2: Properties.php:151
Service_Node_Properties->sync(NULL null, boolean false)
3: Components.php:20
Service_Node_Components->sync()
4: Properties.php:32
Service_Node_Properties->__construct(object of type Db_Table_Row_ServiceNode)
5: ServiceNode.php:185
Db_Table_Row_ServiceNode->components()
6: ServiceNode.php:88
Db_Table_Row_ServiceNode->refreshProperties()
7: auth.php3:507

Warning: Cannot modify header information - headers already sent by (output started at /usr/local/psa/admin/plib/Form/Abstract.php:404) in /usr/local/psa/admin/smb/application/library/Smb/Exception/Syntax.php on line 62
PHP Warning: psasem_lock() failed for semnum 35: semaphores must be acquired in the incremental mode, mask = 34359738367 semset = 68719476736

3) The command below hangs and does not show any output:

/usr/local/psa/bin/admin --show-password

Cause

  1. Not enough free disk space (/var partition).
  2. Corrupted rpm database.

Resolution

Check free disk space and rebuild rpm database:

    rm -f /var/lib/rpm/__db*

rpm --rebuilddb
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