# Altering Liquibase- Cannot find database driver: com.mysql.cj.jdbc.Driver **URL:** \ **Category:** Liquibase Development\ **Created:** [March 11, 2021, 12:49pm UTC](https://forum.liquibase.org/t/altering-liquibase-cannot-find-database-driver-com-mysql-cj-jdbc-driver/5183 "2021-03-11T12:49:54Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![fabiopires10](https://avatars.discourse-cdn.com/v4/letter/f/779978/32.png) [@fabiopires10](https://forum.liquibase.org/u/fabiopires10)\ **Post date:** [March 11, 2021, 12:49pm UTC](https://forum.liquibase.org/t/altering-liquibase-cannot-find-database-driver-com-mysql-cj-jdbc-driver/5183/1 "2021-03-11T12:49:54Z")
I am trying to alter the liquibase source code so that I can send a regex as table name when trying to add columns. I made my alterations but when I try to run it I get the following error ```auto Cannot find database driver : com.mysql.cj.jdbc.Driver ``` I check my liquibase.properties files and I am specifying what my driver is ```auto url=jdbc:mysql://localhost:3306/liquibase username= ***** changeLogFile=changelog1167.xml password= ****** driver=com.mysql.cj.jdbc.Driver ``` What am I doing wrong? ---
**Author:** ![praneethvarmab](https://avatars.discourse-cdn.com/v4/letter/p/d2c977/32.png) [@praneethvarmab](https://forum.liquibase.org/u/praneethvarmab)\ **Post date:** [March 15, 2021, 10:04pm UTC](https://forum.liquibase.org/t/altering-liquibase-cannot-find-database-driver-com-mysql-cj-jdbc-driver/5183/2 "2021-03-15T22:04:09Z")
Hi @fabiopires10 May I know in which os are you doing this. Once try downloading the mysql driver and saving it in the liquibase/bin directory and then try to connect. I had a similar problem with oracle. I have downloaded the driver and saved it in the bin folder of the liquibase and it worked for me ---
**Author:** ![fabiopires10](https://avatars.discourse-cdn.com/v4/letter/f/779978/32.png) [@fabiopires10](https://forum.liquibase.org/u/fabiopires10)\ **Post date:** [March 16, 2021, 5:01pm UTC](https://forum.liquibase.org/t/altering-liquibase-cannot-find-database-driver-com-mysql-cj-jdbc-driver/5183/3 "2021-03-16T17:01:07Z")
> [@praneethvarmab](#): > > in which os are you doing this. Once try downloading the mysql driver and saving it in the liquibase/bin directory and then try to connect. I had a similar problem with oracle. I have downl I downloaded the jar and it worked. But now I am having trouble in step 8([https://www.liquibase.org/community/contribute/code](https://www.liquibase.org/community/contribute/code)) and I don’t know why because i didn’t alter the code. The error occurs when i Run Maven Build in install. ```auto [INFO] ------------------------------------------------------- [INFO] T E S T S [INFO] ------------------------------------------------------- [INFO] [INFO] Results: [INFO] [INFO] Tests run: 0, Failures: 0, Errors: 0, Skipped: 0 [INFO] [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 01:59 min [INFO] Finished at: 2021-03-16T17:00:06Z [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.22.1:test (default-test) on project liquibase-core: There are test failures. [ERROR] [ERROR] Please refer to C:\Users\fabio\OneDrive\Ambiente de Trabalho\Liquibase\liquibase\liquibase-core\target\surefire-reports for the individual test results. [ERROR] Please refer to dump files (if any exist) [date].dump, [date]-jvmRun[N].dump and [date].dumpstream. [ERROR] The forked VM terminated without properly saying goodbye. VM crash or System.exit called? [ERROR] Command was cmd.exe /X /C "C:\Users\fabio\.jdks\openjdk-15.0.2\bin\java "-javaagent:C:\\Users\\fabio\\.m2\\repository\\org\\jacoco\\org.jacoco.agent\\0.8.5\\org.jacoco.agent-0.8.5-runtime.jar=destfile=C:\\Users\\fabio\\OneDrive\\Ambiente de Trabalho\\Liquibase\\liquibase\\liquibase-core\\target\\jacoco.exec" -jar C:\Users\fabio\AppData\Local\Temp\surefire12166349281491411511\surefirebooter10301696738189682549.jar C:\Users\fabio\AppData\Local\Temp\surefire12166349281491411511 2021-03-16T17-00-03_150-jvmRun1 surefire8979647988698112489tmp surefire_013398121462052487439tmp" [ERROR] Error occurred in starting fork, check output in log [ERROR] Process Exit Code: 1 [ERROR] org.apache.maven.surefire.booter.SurefireBooterForkException: The forked VM terminated without properly saying goodbye. VM crash or System.exit called? [ERROR] Command was cmd.exe /X /C "C:\Users\fabio\.jdks\openjdk-15.0.2\bin\java "-javaagent:C:\\Users\\fabio\\.m2\\repository\\org\\jacoco\\org.jacoco.agent\\0.8.5\\org.jacoco.agent-0.8.5-runtime.jar=destfile=C:\\Users\\fabio\\OneDrive\\Ambiente de Trabalho\\Liquibase\\liquibase\\liquibase-core\\target\\jacoco.exec" -jar C:\Users\fabio\AppData\Local\Temp\surefire12166349281491411511\surefirebooter10301696738189682549.jar C:\Users\fabio\AppData\Local\Temp\surefire12166349281491411511 2021-03-16T17-00-03_150-jvmRun1 surefire8979647988698112489tmp surefire_013398121462052487439tmp" [ERROR] Error occurred in starting fork, check output in log [ERROR] Process Exit Code: 1 [ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.fork(ForkStarter.java:669) [ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:282) [ERROR] at org.apache.maven.plugin.surefire.booterclient.ForkStarter.run(ForkStarter.java:245) [ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeProvider(AbstractSurefireMojo.java:1183) [ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.executeAfterPreconditionsChecked(AbstractSurefireMojo.java:1011) [ERROR] at org.apache.maven.plugin.surefire.AbstractSurefireMojo.execute(AbstractSurefireMojo.java:857) [ERROR] at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156) [ERROR] at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148) [ERROR] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117) [ERROR] at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81) [ERROR] at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56) [ERROR] at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128) [ERROR] at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305) [ERROR] at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192) [ERROR] at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105) [ERROR] at org.apache.maven.cli.MavenCli.execute(MavenCli.java:957) [ERROR] at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:289) [ERROR] at org.apache.maven.cli.MavenCli.main(MavenCli.java:193) [ERROR] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [ERROR] at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:64) [ERROR] at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) [ERROR] at java.base/java.lang.reflect.Method.invoke(Method.java:564) [ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282) [ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225) [ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406) [ERROR] at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347) [ERROR] at org.codehaus.classworlds.Launcher.main(Launcher.java:47) [ERROR] [ERROR] -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException Process finished with exit code 1 ```