# JDBC-Input-Plug-In unable to execute SELECT COUTN(\*) FROM sys.session

**URL:** <https://discuss.elastic.co/t/jdbc-input-plug-in-unable-to-execute-select-coutn-from-sys-session/190156>\
**Category:** Logstash\
**Created:** [July 12, 2019, 7:55am UTC](https://discuss.elastic.co/t/jdbc-input-plug-in-unable-to-execute-select-coutn-from-sys-session/190156 "2019-07-12T07:55:23Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Arcefi](https://avatars.discourse-cdn.com/v4/letter/a/b5e925/32.png) [@Arcefi](https://discuss.elastic.co/u/Arcefi)\
**Post date:** [July 12, 2019, 7:55am UTC](https://discuss.elastic.co/t/jdbc-input-plug-in-unable-to-execute-select-coutn-from-sys-session/190156/1 "2019-07-12T07:55:23Z")

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I want to use Logstash to get the current count of all sessions on my MySQL DB every second.

Thats my configuration for the pipeline:

```
input {
  jdbc {
    jdbc_driver_library => "/usr/share/java/mysql-connector-java-5.1.45.jar"
    jdbc_driver_class => "com.mysql.jdbc.Driver"
    jdbc_connection_string => "jdbc:mysql://localhost:3306/sys?serverTimezone=UTC"
    jdbc_user => "user"
    jdbc_password => "password"
    schedule => "* * * * *"
    statement => "SELECT COUNT(*) AS count_sessions FROM sys.session"
   }
}

output {
  elasticsearch {
    hosts => ["localhost:19200"]
    index => "mysql-session-count-live-%{+YYYY.MM.dd}"
  }
}

```

if I run this config I´m getting no error, but Logstash can´t execute the query and can´t be closed via systemctl stop logstash.service anymore. It says: blocked on starting worker...

Any Ideas why this happens?

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [August 9, 2019, 7:55am UTC](https://discuss.elastic.co/t/jdbc-input-plug-in-unable-to-execute-select-coutn-from-sys-session/190156/2 "2019-08-09T07:55:28Z")

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