如何关闭然后重新打开Xodus数据库？

时间：2020-04-26 12:18:09

标签： kotlin xodus

我实现了创建，关闭和打开数据库的简单示例：

package whatever

import jetbrains.exodus.entitystore.Entity
import kotlinx.dnq.XdEntity
import kotlinx.dnq.XdModel
import kotlinx.dnq.XdNaturalEntityType
import kotlinx.dnq.store.container.StaticStoreContainer
import kotlinx.dnq.util.initMetaData
import kotlinx.dnq.xdRequiredStringProp
import org.junit.Test
import java.nio.file.Files

class UnclosedTest {
    private val dbFolder = Files.createTempDirectory(null).toFile()

    private val store = StaticStoreContainer.init(
            dbFolder = dbFolder,
            environmentName = "store"
    ).also {
        XdModel.registerNodes(
                Bogus
        )

        initMetaData(XdModel.hierarchy, it)
    }

    @Test
    fun `the database is unlocked when store is closed`() {
        store.use { store ->
            store.transactional {
                Bogus.new {
                    text = "gnarf"
                }
            }
        }

        assert(dbFolder.exists())
        assert(dbFolder.isDirectory)
        assert(dbFolder.resolve("xd.lck").exists())

        PersistentEntityStores.newInstance(dbFolder)
        // ^^^ throws
    }

    class Bogus(entity: Entity) : XdEntity(entity) {
        companion object : XdNaturalEntityType<Bogus>()

        var text by xdRequiredStringProp()
    }
}

令人惊讶的是，该测试失败并出现Can't acquire environment lock异常：


Can't acquire environment lock after 0 ms.

 Lock owner info: 
Private property of Exodus: 6429@momo.local

jetbrains.exodus.io.LockingManager.lock(LockingManager.java:108)
jetbrains.exodus.io.LockingManager.lock(LockingManager.java:56)
jetbrains.exodus.io.FileDataWriter.lock(FileDataWriter.kt:97)
jetbrains.exodus.log.Log.tryLock(Log.kt:796)
jetbrains.exodus.log.Log.<init>(Log.kt:120)
jetbrains.exodus.env.Environments.newLogInstance(Environments.java:142)
jetbrains.exodus.env.Environments.newLogInstance(Environments.java:121)
jetbrains.exodus.env.Environments.newLogInstance(Environments.java:105)
jetbrains.exodus.env.Environments.newInstance(Environments.java:60)
kotlinx.dnq.store.container.EntityStoreHelperKt.createTransientEntityStore(EntityStoreHelper.kt:33)
kotlinx.dnq.store.container.StaticStoreContainer.init(StaticStoreContainer.kt:36)
kotlinx.dnq.store.container.StaticStoreContainer.init$default(StaticStoreContainer.kt:35)
uk.ac.kcl.mplatt.ridesharing.UnclosedTest.<init>(UnclosedTest.kt:17)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:106)
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:66)
org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:117)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:155)
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:137)
org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404)
org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
java.lang.Thread.run(Thread.java:748)

jetbrains.exodus.ExodusException: Can't acquire environment lock after 0 ms.

 Lock owner info: 
Private property of Exodus: 6429@momo.local

jetbrains.exodus.io.LockingManager.lock(LockingManager.java:108)
jetbrains.exodus.io.LockingManager.lock(LockingManager.java:56)
jetbrains.exodus.io.FileDataWriter.lock(FileDataWriter.kt:97)
jetbrains.exodus.log.Log.tryLock(Log.kt:796)
jetbrains.exodus.log.Log.<init>(Log.kt:120)
jetbrains.exodus.env.Environments.newLogInstance(Environments.java:142)
jetbrains.exodus.env.Environments.newLogInstance(Environments.java:121)
jetbrains.exodus.env.Environments.newLogInstance(Environments.java:105)
jetbrains.exodus.env.Environments.newInstance(Environments.java:60)
kotlinx.dnq.store.container.EntityStoreHelperKt.createTransientEntityStore(EntityStoreHelper.kt:33)
kotlinx.dnq.store.container.StaticStoreContainer.init(StaticStoreContainer.kt:36)
kotlinx.dnq.store.container.StaticStoreContainer.init$default(StaticStoreContainer.kt:35)
uk.ac.kcl.mplatt.ridesharing.UnclosedTest.<init>(UnclosedTest.kt:17)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
java.lang.reflect.Constructor.newInstance(Constructor.java:423)
org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217)
org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266)
org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263)
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
org.junit.runners.ParentRunner.run(ParentRunner.java:363)
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:106)
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:66)
org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:117)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:155)
org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:137)
org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404)
org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
java.lang.Thread.run(Thread.java:748)

    at jetbrains.exodus.log.Log.tryLock(Log.kt:797)
    at jetbrains.exodus.log.Log.<init>(Log.kt:120)
    at jetbrains.exodus.env.Environments.newLogInstance(Environments.java:142)
    at jetbrains.exodus.env.Environments.newLogInstance(Environments.java:121)
    at jetbrains.exodus.env.Environments.newLogInstance(Environments.java:105)
    at jetbrains.exodus.env.Environments.newInstance(Environments.java:60)
    at jetbrains.exodus.entitystore.PersistentEntityStores.newInstance(PersistentEntityStores.java:64)
    at uk.ac.kcl.mplatt.ridesharing.UnclosedTest.lock file is removed when store is closed(UnclosedTest.kt:42)
    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.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.runTestClass(JUnitTestClassExecutor.java:106)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:58)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecutor.execute(JUnitTestClassExecutor.java:38)
    at org.gradle.api.internal.tasks.testing.junit.AbstractJUnitTestClassProcessor.processTestClass(AbstractJUnitTestClassProcessor.java:66)
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:51)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.internal.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
    at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
    at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:117)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:155)
    at org.gradle.internal.remote.internal.hub.MessageHubBackedObjectConnection$DispatchWrapper.dispatch(MessageHubBackedObjectConnection.java:137)
    at org.gradle.internal.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:404)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
    at java.lang.Thread.run(Thread.java:748)

如何关闭并重新打开数据库？

1 个答案:

答案 0 :(得分：1)

这是Xodus-DNQ 1.4.446中引入的错误，感谢您的注意。解决方法是，另外将use函数应用于store.persistentStore.environment：

store.persistentStore.environment.use {
    store.use {
        // ...
    }
}

该错误将很快得到修复，新版本将在几天内发布到Maven Central。新版本不会破坏解决方法。

相关问题
最新问题