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Can't load implementation for DatabaseConnectionAutoRegistration

See original GitHub issue

java.lang.ExceptionInInitializerError: null
	at one.xjcyan1de.creativeplus.CreativePlus.connectDatabase(CreativePlus.kt:70) ~[?:?]
	at one.xjcyan1de.creativeplus.CreativePlus.enable(CreativePlus.kt:43) ~[?:?]
	at com.github.xjcyan1de.cyanlibz.plugin.ExtendedBukkitPlugin.onEnable(ExtendedBukkitPlugin.kt:38) ~[?:?]
	at org.bukkit.plugin.java.JavaPlugin.setEnabled(JavaPlugin.java:263) ~[patched_1.15.1.jar:git-Paper-27]
	at org.bukkit.plugin.java.JavaPluginLoader.enablePlugin(JavaPluginLoader.java:338) ~[patched_1.15.1.jar:git-Paper-27]
	at org.bukkit.plugin.SimplePluginManager.enablePlugin(SimplePluginManager.java:420) ~[patched_1.15.1.jar:git-Paper-27]
	at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugin(CraftServer.java:468) ~[patched_1.15.1.jar:git-Paper-27]
	at org.bukkit.craftbukkit.v1_15_R1.CraftServer.enablePlugins(CraftServer.java:382) ~[patched_1.15.1.jar:git-Paper-27]
	at net.minecraft.server.v1_15_R1.MinecraftServer.a(MinecraftServer.java:481) ~[patched_1.15.1.jar:git-Paper-27]
	at net.minecraft.server.v1_15_R1.DedicatedServer.init(DedicatedServer.java:290) ~[patched_1.15.1.jar:git-Paper-27]
	at net.minecraft.server.v1_15_R1.MinecraftServer.run(MinecraftServer.java:884) ~[patched_1.15.1.jar:git-Paper-27]
	at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.IllegalStateException: Can't load implementation for DatabaseConnectionAutoRegistration
	at org.jetbrains.exposed.sql.Database.<clinit>(Database.kt:64) ~[?:?]
	... 12 more

CreativePlus.connectDatabase:

    private fun connectDatabase() = Database.connect(
        HikariDataSource(HikariConfig().apply {
            jdbcUrl = Config.sqlUrl
            driverClassName = Config.sqlDriver
            username = Config.sqlUsername
            password = Config.sqlPassword
            maximumPoolSize = 4
            addDataSourceProperty("cachePrepStmts", "true")
            addDataSourceProperty("prepStmtCacheSize", "250")
            addDataSourceProperty("prepStmtCacheSqlLimit", "2048")
            addDataSourceProperty("characterEncoding", "utf8")
            addDataSourceProperty("useUnicode", "true")
            addDataSourceProperty("useSSL", "false")
            addDataSourceProperty("useJDBCCompliantTimezoneShift", "true")
            addDataSourceProperty("useLegacyDatetimeCode", "false")
            addDataSourceProperty("serverTimezone", TimeZone.getDefault().id)
        })
    )

Issue Analytics

State:
Created 4 years ago
Comments:14 (3 by maintainers)

Top GitHub Comments

13reactions

Tapaccommented, Dec 30, 2019

You have to add exposed-jdbc into your dependency. It’s a transport layer implementation (the only at the moment).

8reactions

StepBySteplercommented, Dec 30, 2019

Encountered the same issue. The problem is that exposed classes here are loaded by other ClassLoader instance, but line 64 of org.jetbrains.exposed.sql.Database uses contextClassLoader under the hood: ServiceLoader.load(DatabaseConnectionAutoRegistration::class.java) invokes overload with Thread.currentThread().getContextClassLoader(). I suggest to manually specify the classloader to search (org.jetbrains.exposed.sql.Database::class.java.classLoader, for example). This way dynamically loaded jars (like Bukkit plugins) can also use Exposed.

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