upgraded to 4.4: no MySQL connection anymore

lemon6 years ago

Hi!

I've upgraded from 4.3 to 4.4 on my Debian system (latest release), before upgrading everything worked fine. I made a copy of the config file (traccar.xml), removed the old version as described in documentation, installed the new one, copied the config file and started traccar.service.
But now I get the following in traccar-server.log:

2019-04-29 22:20:10  INFO: HikariPool-1 - Starting...
2019-04-29 22:20:10  WARN: Registered driver with driverClassName=com.mysql.jdbc.Driver was not found, trying direct instantiation.
2019-04-29 22:20:15 ERROR: HikariPool-1 - Exception during pool initialization. - Could not create connection to database server. Attempted reconnect 3 times. Giving up. - SQLNonTransientConnectionException (... < DataManager:139 < *:89 < Context:292 < Main:110 < ...)
2019-04-29 22:20:15 ERROR: Main method error - Failed to initialize pool: Could not create connection to database server. Attempted reconnect 3 times. Giving up. - PoolInitializationException (... < DataManager:139 < *:89 < Context:292 < Main:110 < ...)

How could that be? Config file didn't change, also database didn't, how can the com.mysql.jdbc.Driver not be found now?

Thanks for your help!

Andreas

Anton Tananaev6 years ago

Try to set logger.fullStackTraces to true in the config.

lemon6 years ago

Ok, did it, this is the log:

2019-04-29 22:42:16  INFO: HikariPool-1 - Starting...
2019-04-29 22:42:16  WARN: Registered driver with driverClassName=com.mysql.jdbc.Driver was not found, trying direct instantiation.
2019-04-29 22:42:20 ERROR: HikariPool-1 - Exception during pool initialization. -
java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
        at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:905)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:830)
        at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:455)
        at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240)
        at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
        at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
        at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:353)
        at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:201)
        at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:473)
        at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:562)
        at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115)
        at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:81)
        at org.traccar.database.DataManager.initDatabase(DataManager.java:139)
        at org.traccar.database.DataManager.<init>(DataManager.java:89)
        at org.traccar.Context.init(Context.java:292)
        at org.traccar.Main.run(Main.java:110)
        at org.traccar.Main.main(Main.java:104)
Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value 'CEST' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85)
        at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:132)
        at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2241)
        at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2265)
        at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1319)
        at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:868)
        ... 16 more

2019-04-29 22:42:20 ERROR: Main method error -
com.zaxxer.hikari.pool.HikariPool$PoolInitializationException: Failed to initialize pool: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
        at com.zaxxer.hikari.pool.HikariPool.throwPoolInitializationException(HikariPool.java:597)
        at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:576)
        at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115)
        at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:81)
        at org.traccar.database.DataManager.initDatabase(DataManager.java:139)
        at org.traccar.database.DataManager.<init>(DataManager.java:89)
        at org.traccar.Context.init(Context.java:292)
        at org.traccar.Main.run(Main.java:110)
        at org.traccar.Main.main(Main.java:104)
Caused by: java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
        at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
        at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:905)
        at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:830)
        at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:455)
        at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:240)
        at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:199)
        at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
        at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:353)
        at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:201)
        at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:473)
        at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:562)
        ... 7 more
Caused by: com.mysql.cj.exceptions.InvalidConnectionAttributeException: The server time zone value 'CEST' is unrecognized or represents more than one time zone. You must configure either the server or JDBC driver (via the serverTimezone configuration property) to use a more specifc time zone value if you want to utilize time zone support.
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
        at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:85)
        at com.mysql.cj.util.TimeUtil.getCanonicalTimezone(TimeUtil.java:132)
        at com.mysql.cj.protocol.a.NativeProtocol.configureTimezone(NativeProtocol.java:2241)
        at com.mysql.cj.protocol.a.NativeProtocol.initServerSession(NativeProtocol.java:2265)
        at com.mysql.cj.jdbc.ConnectionImpl.initializePropsFromServer(ConnectionImpl.java:1319)
        at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:868)
        ... 16 more```
lemon6 years ago

Ok, I added 

&serverTimezone=UTC

to the config file, now it's working.

Thank you very much, Anton!!!

Anton Tananaev6 years ago

Updated documentation:

https://www.traccar.org/mysql/

Jose A Perez6 years ago

Hi:

In adition to that, I also have upgraded

<entry key='database.driver'>com.mysql.jdbc.Driver</entry>

to

<entry key='database.driver'>com.mysql.cj.jdbc.Driver</entry>

to avoid driver deprecation message.

Castillo5 years ago

Thanks you very much every one!

I solved the problem while upgraded v4.2 to 4.5 adding the "timezone" tag and modifing the name of database driver to avoid driver deprecation message.

Nigel3 years ago

Hi, I am running my traccar on Amazon Aws Linux server, i have been experiencing instances where traccar goes offline and here are my logs. Please kindly help for solution on the work around to this.

2021-08-07 12:10:41  INFO: HikariPool-1 - Starting...
2021-08-07 12:10:52  INFO: HikariPool-1 - Starting...
2021-08-07 12:10:57 ERROR: HikariPool-1 - Exception during pool initialization. - 
java.sql.SQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:110)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:89)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:63)
    at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:73)
    at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:906)
    at com.mysql.cj.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:831)
    at com.mysql.cj.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:456)
    at com.mysql.cj.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:246)
    at com.mysql.cj.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:197)
    at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:138)
    at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:364)
    at com.zaxxer.hikari.pool.PoolBase.newPoolEntry(PoolBase.java:206)
    at com.zaxxer.hikari.pool.HikariPool.createPoolEntry(HikariPool.java:476)
    at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:561)
    at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:115)
    at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:81)
    at org.traccar.database.DataManager.initDatabase(DataManager.java:126)
    at org.traccar.database.DataManager.<init>(DataManager.java:85)
    at org.traccar.Context.init(Context.java:289)
    at org.traccar.Main.run(Main.java:120)
    at org.traccar.Main.main(Main.java:106)
Caused by: com.mysql.cj.exceptions.CJCommunicationsException: 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 java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:61)
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:105)
    at com.mysql.cj.exceptions.ExceptionFactory.createException(ExceptionFactory.java:151)
    at com.mysql.cj.exceptions.ExceptionFactory.createCommunicationsException(ExceptionFactory.java:167)
    at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:91)
    at com.mysql.cj.NativeSession.connect(NativeSession.java:144)
    at com.mysql.cj.jdbc.ConnectionImpl.connectWithRetries(ConnectionImpl.java:850)
    ... 16 more
Caused by: java.net.ConnectException: Connection refused (Connection refused)
    at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)
    at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)
    at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)
    at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)
    at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:403)
    at java.base/java.net.Socket.connect(Socket.java:609)
    at com.mysql.cj.protocol.StandardSocketFactory.connect(StandardSocketFactory.java:155)
    at com.mysql.cj.protocol.a.NativeSocketConnection.connect(NativeSocketConnection.java:65)
    ... 18 more

...
Anton Tananaev3 years ago

Your database is not accessible:

Could not create connection to database server

Nigel3 years ago

Thanks Anton, issue fixed