Did your MySQL Database Connection just fail?
[poll type=multiple max=4]
- Yes
- No
- Linux
- Windows
- Just Updated
[/poll]
PROBLEM
Caveats - I am a Ignition newb and relative Ubuntu Linux newb. Accordingly please be gentle. While developing an initial customer application my easy chart is faulted out in red with an error
MySQL Database Connection Faulted
PRIME SUSPECT
Just updated MySQL recently
xxxxxxxxxx@u1204vm_xxx:~$ apt-cache show mysql-server | grep Version
Version: 5.5.31-0ubuntu0.12.04.2
Version: 5.5.31-0ubuntu0.12.04.1
Version: 5.5.22-0ubuntu1
STATUS
at h t t p : // 192.168.xxx.xxx:8088/main/web/config/database.connections?12
Database Connections
MySQL01 enable live values
Faulted
Error:
Cannot create PoolableConnectionFactory (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.)
ENVIRONMENT
Ignition Version 7.6.1 (b2278)
Java Version Sun Microsystems Inc. 1.6.0_45
Ubuntu Server 12.04 with LXDE GUI running in KVM Virtual Machine
MySQL Version: 5.5.31-0ubuntu0.12.04.2
OBSERVATIONS
I see that another user is having a similar problem with the forum topic today
Database Connection Failing with high CPU Usage
I had searched on the most prolific error observed
viewtopic.php?f=72&t=8430&start=0&st=0&sk=t&sd=a&hilit=java.lang.Exception%3A+Unable+to+add+data+to+memory+buffer%2C+buffer+full.
POSSIBLE SOLUTIONS
-
Wait until tomorrow and hopefully just
sudo apt-get update
sudo apt-get upgrade -
Try to figure out how to revert my MySQL version
since I hadn’t done a recent complete environment backup
thankfully my recent application development is backed up -
Restore from an old environment backup and do a bunch of updates and
restore my recent application development work -
See what the auspicious forum has to say
LOG TEXT
Overview
Modules
SQLTags
Database Connections
Store & Forward
OPC Connections
Sessions
Gateway Scripts
Alarm Pipelines
OPC-UA Server
Logged in as admin | log out
Database Connections
MySQL01 enable live values
Faulted
Error:
hide Details
org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (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.)
org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1225)
org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
com.inductiveautomation.ignition.gateway.datasource.DatasourceImpl.getConnectionInternal(DatasourceImpl.java:194)
com.inductiveautomation.ignition.gateway.datasource.DatasourceImpl.runTest(DatasourceImpl.java:150)
com.inductiveautomation.ignition.gateway.datasource.DatasourceManagerImpl$FaultedDatasourceRetryer.run(DatasourceManagerImpl.java:1103)
java.lang.Thread.run(Thread.java:662)
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.
sun.reflect.GeneratedConstructorAccessor50.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor.newInstance(Constructor.java:513)
com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1117)
com.mysql.jdbc.MysqlIO.(MysqlIO.java:355)
com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2461)
com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2498)
com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2283)
com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:822)
com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47)
sun.reflect.GeneratedConstructorAccessor47.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor.newInstance(Constructor.java:513)
com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:404)
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:317)
org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:294)
org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1247)
org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1221)
org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
com.inductiveautomation.ignition.gateway.datasource.DatasourceImpl.getConnectionInternal(DatasourceImpl.java:194)
com.inductiveautomation.ignition.gateway.datasource.DatasourceImpl.runTest(DatasourceImpl.java:150)
com.inductiveautomation.ignition.gateway.datasource.DatasourceManagerImpl$FaultedDatasourceRetryer.run(DatasourceManagerImpl.java:1103)
java.lang.Thread.run(Thread.java:662)
java.net.ConnectException: Connection refused
java.net.PlainSocketImpl.socketConnect(Native Method)
java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
java.net.Socket.connect(Socket.java:529)
java.net.Socket.connect(Socket.java:478)
java.net.Socket.(Socket.java:375)
java.net.Socket.(Socket.java:218)
com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:259)
com.mysql.jdbc.MysqlIO.(MysqlIO.java:305)
com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2461)
com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2498)
com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2283)
com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:822)
com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:47)
sun.reflect.GeneratedConstructorAccessor47.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
java.lang.reflect.Constructor.newInstance(Constructor.java:513)
com.mysql.jdbc.Util.handleNewInstance(Util.java:411)
com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:404)
com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:317)
org.apache.commons.dbcp.DriverConnectionFactory.createConnection(DriverConnectionFactory.java:38)
org.apache.commons.dbcp.PoolableConnectionFactory.makeObject(PoolableConnectionFactory.java:294)
org.apache.commons.dbcp.BasicDataSource.validateConnectionFactory(BasicDataSource.java:1247)
org.apache.commons.dbcp.BasicDataSource.createDataSource(BasicDataSource.java:1221)
org.apache.commons.dbcp.BasicDataSource.getConnection(BasicDataSource.java:880)
com.inductiveautomation.ignition.gateway.datasource.DatasourceImpl.getConnectionInternal(DatasourceImpl.java:194)
com.inductiveautomation.ignition.gateway.datasource.DatasourceImpl.runTest(DatasourceImpl.java:150)
com.inductiveautomation.ignition.gateway.datasource.DatasourceManagerImpl$FaultedDatasourceRetryer.run(DatasourceManagerImpl.java:1103)
java.lang.Thread.run(Thread.java:662)
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