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Plesk UI is unresponsive: Zend_Db_Adapter_Exception: SQLSTATE[HY000] [2002] No such file or directory

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Julian Bonpland Mignaquy
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Plesk for Linux kb: technical ABT: Group A

Applicable to:

  • Plesk for Linux

Symptoms

Plesk UI is unresponsive with the following error:

CONFIG_TEXT: Server Error
500
Zend_Db_Adapter_Exception
SQLSTATE[HY000] [2002] Connection refused

Cause

Connection to the database is repeatedly dropping, causing Plesk unavailability before spare space is freed by automatic deletion of a temporary file:

The root partition is running out of a free space:

# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 50G 50G 9M 100% /
devtmpfs 7.7G 0 7.7G 0% /dev
tmpfs 7.7G 0 7.7G 0% /dev/shm
tmpfs 7.7G 121M 7.6G 2% /run

Resolution

Clear some free space or expand the partition: How to clean temporary Plesk files on a Linux server

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