# Communications link failure\\n\\nThe last packet successfully received from the server was 50,079 milliseconds ago. The last packet sent successfully to the server was 50,080 milliseconds ago.",

**URL:** <https://discuss.elastic.co/t/communications-link-failure-n-nthe-last-packet-successfully-received-from-the-server-was-50-079-milliseconds-ago-the-last-packet-sent-successfully-to-the-server-was-50-080-milliseconds-ago/322698>\
**Category:** Logstash\
**Tags:** jdbc\
**Created:** [January 9, 2023, 4:49am UTC](https://discuss.elastic.co/t/communications-link-failure-n-nthe-last-packet-successfully-received-from-the-server-was-50-079-milliseconds-ago-the-last-packet-sent-successfully-to-the-server-was-50-080-milliseconds-ago/322698 "2023-01-09T04:49:52Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![sohan](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/sohan/32/115693_2.png) [@sohan](https://discuss.elastic.co/u/sohan)\
**Post date:** [January 9, 2023, 4:49am UTC](https://discuss.elastic.co/t/communications-link-failure-n-nthe-last-packet-successfully-received-from-the-server-was-50-079-milliseconds-ago-the-last-packet-sent-successfully-to-the-server-was-50-080-milliseconds-ago/322698/1 "2023-01-09T04:49:53Z")

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jdbc\_driver\_library =\> "/opt/bitnami/logstash/logstash-core/lib/jars/mysql-connector-java.jar"  
jdbc\_driver\_class =\> "com.mysql.cj.jdbc.Driver"  
jdbc\_connection\_string =\> "jdbc:mysql://db:3306/dbname?zeroDateTimeBehavior=convertToNull&useCursorFetch=true&autoReconnect=true&sessionVariables=group\_concat\_max\_len=150000,sort\_buffer\_size=524288,wait\_timeout=28800,interactive\_timeout=28800"  
jdbc\_paging\_enabled =\> true  
jdbc\_page\_size =\> 1000000  
jdbc\_validate\_connection =\> true  
jdbc\_validation\_timeout =\> 300  
connection\_retry\_attempts =\> 10  
connection\_retry\_attempts\_wait\_time =\> 30

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<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:** [February 6, 2023, 4:50am UTC](https://discuss.elastic.co/t/communications-link-failure-n-nthe-last-packet-successfully-received-from-the-server-was-50-079-milliseconds-ago-the-last-packet-sent-successfully-to-the-server-was-50-080-milliseconds-ago/322698/2 "2023-02-06T04:50:26Z")

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