我在 Flyway JDBC 迁移方面遇到了问题:执行完所有语句后，我尝试使用 conn.close(); 方法关闭数据库连接，但我收到了 org.postgresql.util.PSQLException:此连接已关闭。 异常。当我检查我的数据库时 - 我在迁移中所做的所有更改都已完成，但 schema_version 表未更新:未添加有关迁移的项目。
更多详情:
在 flyway.properties 中，我将 classpath:com/packageone/somepackege/database/migration 添加到 flyway.locations 部分。然后我创建了一个将执行迁移的类:public class V1_1_1__SomeImportantMigration implements JdbcMigration 并填写了 migrate 方法，如下所示:
@Override
public void migrate( Connection conn ) throws Exception {
beforeActions( conn );
veryImportantMigration( conn, getData( conn ) );
afterActions( conn );
conn.close();
}
在 migrate 方法中完成的事情被应用，但关闭连接导致异常。
由于上述信息，我有这样的问题:为什么这个连接在我关闭之前就关闭了？通过什么？
更新(堆栈跟踪):
[ERROR] Unable to rollback transaction
org.postgresql.util.PSQLException: This connection has been closed.
at org.postgresql.jdbc2.AbstractJdbc2Connection.checkClosed(AbstractJdbc2Connection.java:820)
at org.postgresql.jdbc2.AbstractJdbc2Connection.rollback(AbstractJdbc2Connection.java:837)
at org.flywaydb.core.internal.util.jdbc.TransactionTemplate.execute(TransactionTemplate.java:96)
at org.flywaydb.core.internal.command.DbMigrate.applyMigrations(DbMigrate.java:273)
at org.flywaydb.core.internal.command.DbMigrate.access$800(DbMigrate.java:53)
at org.flywaydb.core.internal.command.DbMigrate$2.call(DbMigrate.java:210)
at org.flywaydb.core.internal.command.DbMigrate$2.call(DbMigrate.java:146)
at org.flywaydb.core.internal.dbsupport.postgresql.PostgreSQLAdvisoryLockTemplate.execute(PostgreSQLAdvisoryLockTemplate.java:68)
at org.flywaydb.core.internal.dbsupport.postgresql.PostgreSQLDbSupport.lock(PostgreSQLDbSupport.java:162)
at org.flywaydb.core.internal.metadatatable.MetaDataTableImpl.lock(MetaDataTableImpl.java:174)
at org.flywaydb.core.internal.command.DbMigrate.migrate(DbMigrate.java:146)
at org.flywaydb.core.Flyway$1.execute(Flyway.java:1010)
at org.flywaydb.core.Flyway$1.execute(Flyway.java:971)
at org.flywaydb.core.Flyway.execute(Flyway.java:1464)
at org.flywaydb.core.Flyway.migrate(Flyway.java:971)
at org.flywaydb.maven.MigrateMojo.doExecute(MigrateMojo.java:30)
at org.flywaydb.maven.AbstractFlywayMojo.execute(AbstractFlywayMojo.java:600)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[ERROR] Unable to restore autocommit to original value for connection
org.postgresql.util.PSQLException: This connection has been closed.
at org.postgresql.jdbc2.AbstractJdbc2Connection.checkClosed(AbstractJdbc2Connection.java:820)
at org.postgresql.jdbc2.AbstractJdbc2Connection.setAutoCommit(AbstractJdbc2Connection.java:762)
at org.flywaydb.core.internal.util.jdbc.TransactionTemplate.execute(TransactionTemplate.java:114)
at org.flywaydb.core.internal.command.DbMigrate.applyMigrations(DbMigrate.java:273)
at org.flywaydb.core.internal.command.DbMigrate.access$800(DbMigrate.java:53)
at org.flywaydb.core.internal.command.DbMigrate$2.call(DbMigrate.java:210)
at org.flywaydb.core.internal.command.DbMigrate$2.call(DbMigrate.java:146)
at org.flywaydb.core.internal.dbsupport.postgresql.PostgreSQLAdvisoryLockTemplate.execute(PostgreSQLAdvisoryLockTemplate.java:68)
at org.flywaydb.core.internal.dbsupport.postgresql.PostgreSQLDbSupport.lock(PostgreSQLDbSupport.java:162)
at org.flywaydb.core.internal.metadatatable.MetaDataTableImpl.lock(MetaDataTableImpl.java:174)
at org.flywaydb.core.internal.command.DbMigrate.migrate(DbMigrate.java:146)
at org.flywaydb.core.Flyway$1.execute(Flyway.java:1010)
at org.flywaydb.core.Flyway$1.execute(Flyway.java:971)
at org.flywaydb.core.Flyway.execute(Flyway.java:1464)
at org.flywaydb.core.Flyway.migrate(Flyway.java:971)
at org.flywaydb.maven.MigrateMojo.doExecute(MigrateMojo.java:30)
at org.flywaydb.maven.AbstractFlywayMojo.execute(AbstractFlywayMojo.java:600)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
[ERROR] Unable to release Flyway advisory lock
org.postgresql.util.PSQLException: This connection has been closed.
at org.postgresql.jdbc2.AbstractJdbc2Connection.checkClosed(AbstractJdbc2Connection.java:820)
at org.postgresql.jdbc3.AbstractJdbc3Connection.prepareStatement(AbstractJdbc3Connection.java:275)
at org.postgresql.jdbc2.AbstractJdbc2Connection.prepareStatement(AbstractJdbc2Connection.java:293)
at org.flywaydb.core.internal.dbsupport.JdbcTemplate.prepareStatement(JdbcTemplate.java:319)
at org.flywaydb.core.internal.dbsupport.JdbcTemplate.execute(JdbcTemplate.java:247)
at org.flywaydb.core.internal.dbsupport.postgresql.PostgreSQLAdvisoryLockTemplate.execute(PostgreSQLAdvisoryLockTemplate.java:81)
at org.flywaydb.core.internal.dbsupport.postgresql.PostgreSQLDbSupport.lock(PostgreSQLDbSupport.java:162)
at org.flywaydb.core.internal.metadatatable.MetaDataTableImpl.lock(MetaDataTableImpl.java:174)
at org.flywaydb.core.internal.command.DbMigrate.migrate(DbMigrate.java:146)
at org.flywaydb.core.Flyway$1.execute(Flyway.java:1010)
at org.flywaydb.core.Flyway$1.execute(Flyway.java:971)
at org.flywaydb.core.Flyway.execute(Flyway.java:1464)
at org.flywaydb.core.Flyway.migrate(Flyway.java:971)
at org.flywaydb.maven.MigrateMojo.doExecute(MigrateMojo.java:30)
at org.flywaydb.maven.AbstractFlywayMojo.execute(AbstractFlywayMojo.java:600)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:863)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:288)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:199)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
最佳答案
您不应在 Flyway 提供给您的连接上调用 close()。 Flyway 将此连接本身用于其他内务处理任务(包括更新版本表)，关闭它会阻止 flyway 正常工作。
关于java - Flyway jdbc迁移连接问题，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/47865766/