Precondition:

• Frontend runs on PHP 8.5.
• Global APM data source (Administration > Data source > APM) points to ClickHouse with a user that ClickHouse rejects for the query, e.g. a user without SELECT on the otel tables:

  CREATE USER qa_noperm IDENTIFIED WITH plaintext_password BY 'qa_noperm'
  

• Administration > Data source > APM: Username/Password qa_noperm, click Update

Steps to reproduce:

• Open Monitoring > APM > Traces
• Click Apply

Result: Depricated error message appears =>

 Function curl_close() is deprecated since 8.5, as it has no effect since PHP 8.0 [zabbix.php:17 → require_once() → ZBase->run() → ZBase->processRequest() → CController->run() → CControllerDataTable->doAction() →
  CControllerApmTraceListData->getData() → CApiWrapper->__call() → CFrontendApiWrapper->callMethod() → CApiWrapper->callMethod() → CApiWrapper->callClientMethod() → CLocalApiClient->callMethod() → CApmTrace->get() →
  CApmTrace->getFromClickHouse() → ApmDbClickHouse->fetch() in include/classes/db/ApmDbClickHouse.php:143]
  Database error occurred.

Expected: No PHP deprecation message, only "Database error occurred.".

Affected places: All APM pages that read ClickHouse through ApmDbClickHouse::fetch() (Traces, Logs, Metrics).