防止彈簧批碰撞

Question

我目前正在使用spring-batch，並且我們的測試服務器在幾個月內出現錯誤。 我們沒有直接訪問這些服務器的權限，而且我無法在我們的環境中重現此錯誤，我所擁有的只是此stacktrace（請參閱下文）。

我的主要問題是，此異常會停止整個批處理。 有解決方法嗎？ 有什么辦法抓住它並繼續嗎？ 問題不直接來自我們的讀取器/處理程序/寫入器中的一個，而是在它們之間，並且我不知道在寫過程中在哪里，但是在java.net.SocketInputStream.read（ SocketInputStream.java:168）“ ...

這是完整的堆棧跟蹤（此后的更多信息）：

    14/04/2016 15:18:46.322 [ERROR] myApp - org.springframework.batch.core.step.AbstractStep            Encountered an error executing step myStep1 in job myJob
org.springframework.transaction.CannotCreateTransactionException: Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Could not open connection
    at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:431) ~[spring-orm-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.transaction.support.AbstractPlatformTransactionManager.getTransaction(AbstractPlatformTransactionManager.java:373) ~[spring-tx-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:130) ~[spring-tx-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.batch.core.step.tasklet.TaskletStep$2.doInChunkContext(TaskletStep.java:271) ~[spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.scope.context.StepContextRepeatCallback.doInIteration(StepContextRepeatCallback.java:77) ~[spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.repeat.support.RepeatTemplate.getNextResult(RepeatTemplate.java:368) ~[spring-batch-infrastructure-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.repeat.support.RepeatTemplate.executeInternal(RepeatTemplate.java:215) ~[spring-batch-infrastructure-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.repeat.support.RepeatTemplate.iterate(RepeatTemplate.java:144) ~[spring-batch-infrastructure-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.step.tasklet.TaskletStep.doExecute(TaskletStep.java:257) ~[spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.step.AbstractStep.execute(AbstractStep.java:198) ~[spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.job.SimpleStepHandler.handleStep(SimpleStepHandler.java:148) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.job.flow.JobFlowExecutor.executeStep(JobFlowExecutor.java:64) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.job.flow.support.state.StepState.handle(StepState.java:67) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.job.flow.support.SimpleFlow.resume(SimpleFlow.java:165) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.job.flow.support.SimpleFlow.start(SimpleFlow.java:144) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.job.flow.FlowJob.doExecute(FlowJob.java:134) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.job.AbstractJob.execute(AbstractJob.java:304) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.launch.support.SimpleJobLauncher$1.run(SimpleJobLauncher.java:135) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.core.task.SyncTaskExecutor.execute(SyncTaskExecutor.java:50) [spring-core-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.batch.core.launch.support.SimpleJobLauncher.run(SimpleJobLauncher.java:128) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.launch.support.CommandLineJobRunner.start(CommandLineJobRunner.java:362) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
    at org.springframework.batch.core.launch.support.CommandLineJobRunner.main(CommandLineJobRunner.java:590) [spring-batch-core-3.0.4.RELEASE.jar:3.0.4.RELEASE]
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.JDBCConnectionException: Could not open connection
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1763) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1677) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.spi.AbstractEntityManagerImpl.throwPersistenceException(AbstractEntityManagerImpl.java:1771) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:64) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    at org.springframework.orm.jpa.vendor.HibernateJpaDialect.beginTransaction(HibernateJpaDialect.java:170) ~[spring-orm-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.orm.jpa.JpaTransactionManager.doBegin(JpaTransactionManager.java:380) ~[spring-orm-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    ... 21 common frames omitted
Caused by: org.hibernate.exception.JDBCConnectionException: Could not open connection
    at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:132) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:126) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:112) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:235) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.getConnection(LogicalConnectionImpl.java:171) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.doBegin(JdbcTransaction.java:67) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.begin(AbstractTransactionImpl.java:162) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.SessionImpl.beginTransaction(SessionImpl.java:1435) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.jpa.internal.TransactionImpl.begin(TransactionImpl.java:61) ~[hibernate-entitymanager-4.3.5.Final.jar:4.3.5.Final]
    ... 23 common frames omitted
Caused by: org.postgresql.util.PSQLException: La tentative de connexion a échoué. (Note: "The connection attempt failed" in english)
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:225) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.core.ConnectionFactory.openConnection(ConnectionFactory.java:64) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.jdbc2.AbstractJdbc2Connection.<init>(AbstractJdbc2Connection.java:136) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.jdbc3.AbstractJdbc3Connection.<init>(AbstractJdbc3Connection.java:29) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.jdbc3g.AbstractJdbc3gConnection.<init>(AbstractJdbc3gConnection.java:21) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.jdbc4.AbstractJdbc4Connection.<init>(AbstractJdbc4Connection.java:31) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.jdbc4.Jdbc4Connection.<init>(Jdbc4Connection.java:24) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.Driver.makeConnection(Driver.java:393) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.Driver.connect(Driver.java:267) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at java.sql.DriverManager.getConnection(DriverManager.java:582) ~[na:1.6.0_45]
    at java.sql.DriverManager.getConnection(DriverManager.java:154) ~[na:1.6.0_45]
    at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriverManager(DriverManagerDataSource.java:153) ~[spring-jdbc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.jdbc.datasource.DriverManagerDataSource.getConnectionFromDriver(DriverManagerDataSource.java:144) ~[spring-jdbc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnectionFromDriver(AbstractDriverBasedDataSource.java:155) ~[spring-jdbc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.springframework.jdbc.datasource.AbstractDriverBasedDataSource.getConnection(AbstractDriverBasedDataSource.java:120) ~[spring-jdbc-4.2.3.RELEASE.jar:4.2.3.RELEASE]
    at org.hibernate.engine.jdbc.connections.internal.DatasourceConnectionProviderImpl.getConnection(DatasourceConnectionProviderImpl.java:139) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.internal.AbstractSessionImpl$NonContextualJdbcConnectionAccess.obtainConnection(AbstractSessionImpl.java:380) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    at org.hibernate.engine.jdbc.internal.LogicalConnectionImpl.obtainConnection(LogicalConnectionImpl.java:228) ~[hibernate-core-4.3.5.Final.jar:4.3.5.Final]
    ... 28 common frames omitted
Caused by: java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:168) ~[na:1.6.0_45]
    at org.postgresql.core.VisibleBufferedInputStream.readMore(VisibleBufferedInputStream.java:143) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.core.VisibleBufferedInputStream.ensureBytes(VisibleBufferedInputStream.java:112) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.core.VisibleBufferedInputStream.read(VisibleBufferedInputStream.java:71) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.core.PGStream.ReceiveChar(PGStream.java:269) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.core.v3.ConnectionFactoryImpl.doAuthentication(ConnectionFactoryImpl.java:376) ~[postgresql-9.2-1002.jdbc4.jar:na]
    at org.postgresql.core.v3.ConnectionFactoryImpl.openConnectionImpl(ConnectionFactoryImpl.java:173) ~[postgresql-9.2-1002.jdbc4.jar:na]
    ... 45 common frames omitted

作為注釋和附帶問題：

當我第一次寫帖子時，問題是“我想知道在工作中何時/何處拋出此異常？”。 我可以用它來防止崩潰，但是實際上，任何解決方案都是好的。

其他數據：stacktrace是我掌握的主要線索。 春季批處理表表示已讀取79000個項目（讀取器的pagesize為50000，但commit-interval為500），直到崩潰為止。 所以我不知道在停止一切時表是否是最新的。

是的，我使用的不是可行的池管理器DriverManagerDataSource 。 我不確定真正的連接池管理器是否會更改任何內容（例如，重試失敗還是存在的任何問題？是否可以在這里工作？），有關DBCP和c3p0的大多數信息似乎已經過時了（如果有人可以阻止，則進行任何重新建議）錯誤將是巨大的）。 99.9％的數據在處理器中引發業務/流控制異常（我知道，但不能更改），並且有一些skippable-exception-classes ，但它們是自定義異常。

對於導致整個事件崩潰的異常（ org.postgresql.util.PSQLException和java.net.SocketException: Connection reset ），我無法重現它，也看不到為什么重置連接：我已經看到了一些關於這個錯誤，但是我無法訪問postgresql日志，有人說這個錯誤甚至可能是由於代理服務器自行設置了超時（或類似原因）。 我什至從顯示的最后一個堆棧跟蹤中查看了類的源代碼，但這沒有幫助。 因此，我認為對此錯誤我無能為力。

謝謝。

Answer 1

JDBCConnectionException：連接被拒絕或連接超時，這意味着數據庫已關閉或拒絕連接。

首先，檢查數據源是否在您的應用程序中使用，包括在hibernate xml中使用的所有配置文件中。 數據庫可能無法訪問。 請檢查IP地址或主機名，端口，數據庫可能不接受TCP / IP連接，防火牆或代理。