tried everything
connectTimeout=0&socketTimeout=0&autoReconnect=true
changed wait_timeout to 31536000 and interactive_timeout= 286399969
but still continue to get the error.
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet successfully received from the server was 70,399,485 milliseconds ago
Related
I'm trying to run a docker-compose with MySQL and I'm getting the classic Communications link failure. I've already read some posts about it, but I still couldn't solve it.
| com.mysql.cj.jdbc.exceptions.CommunicationsException: Communications link failure
| The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
Here is a link with code that I'm working on:
https://github.com/JonatasBaldasso/school-registration/tree/fix/docker-compose
I'm a beginner to jsp & java.And I have developed a simple web application.
Application is working fine when I deploy on the server for some time.
When I try to run my Web Application after some time server returns the following message:
HTTP Status 500 - Internal Server Error
type - Exception report
message - Internal Server Error
description - The server encountered an internal error that prevented it from fulfilling this request.
exception-
javax.servlet.ServletException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 37,611,394 milliseconds ago. The last packet sent successfully to the server was 37,611,394 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
root cause -
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 37,611,394 milliseconds ago. The last packet sent successfully to the server was 37,611,394 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
root cause -
java.net.SocketException: Broken pipe
note - The full stack traces of the exception and its root causes are available in the GlassFish Server Open Source Edition 4.0 logs.
GlassFish Server Open Source Edition 4.0
(Don't know what went wrong .Still searching Google but no luck yet)
probably you need to set your connection url to this.
jdbcUrl = jdbc:mysql://localhost:3306/yourdatabase?useUnicode=yes&characterEncoding=utf8&autoReconnect=true&verifyServerCertificate=false&useSSL=false
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet success fully received from the server was 176,705,355 milliseconds ago. The last packet sent successfully to the server was 176,705,366 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.
I am getting above exception when ever insert query in log4j.xml gets executed??
I'm using the latest MySQL version ... in my java application with named pipe and I started receiving the following error like 20 times in a row:
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at ......
at ......
at ......
at ......
Caused by: java.io.FileNotFoundException: All pipe instances are busy
... 4 more
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at ......
at ......
at ......
at ......
Caused by: java.io.FileNotFoundException: All pipe instances are busy
... 4 more
com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
at ......
at ......
at ......
at ......
Caused by: java.io.FileNotFoundException: All pipe instances are busy
... 4 more
The MySQL server is active and working properly through the command line and PHP. I'm using Windows 7 Ultimate. What is the cause of this java exception and how can I fix this?
Thank you.
I have a java plugin to an application that I'm using (I didn't write it and don't have the source) that connects to my MySQL database...the only problem is that anytime I try to load the application I get a communication link failure
17:51:57 [INFO] Could not create connection: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
17:51:57 [INFO] Database initialization failed: java.lang.NullPointerException
I have verified that all of my mysql settings are pointing to the correct port that I'm giving this plugin and I've also checked to make sure the user I created for this has privileges over the database it's going to be modifying. I'm out of ideas and it never times out, I would think it was the plugin but the plugin has many users and they use the plugin with MySQL just fine and I continue to have the problem after reinstalling the plugin.
I'm sure it's an issue with MySQL but as far as I can tell...everything is fine, so any clues about what would cause this would be great. I've been reading around and the stuff I've seen didn't help the issue.
SOLUTION
for UBUNTU and MySQL 5.1: Added mysqld : ALL to /etc/hosts.allow
for UBUNTU and MySQL 5.1: Added mysqld : ALL to /etc/hosts.allow