java - JPA/Hibernate 在启动期间挂起 native 文件系统操作

Question

这是 JPA/Hibernate hangs on production during EntityManagerFactory creation 的后续内容

我设法在“挂起”状态下获取线程转储，并且发现问题与文件系统列表操作有关。

一般来说，该进程可能会在应用程序引导过程中在此状态下挂起几分钟(约 30)分钟。有任何解决办法或修复吗？

"main" #1 prio=5 os_prio=0 tid=0x00000000010c9000 nid=0x2c73 runnable [0x00007f4c928f5000]
   java.lang.Thread.State: RUNNABLE
    at java.io.UnixFileSystem.list(Native Method)
    at java.io.File.list(File.java:1122)
    at java.io.File.listFiles(File.java:1207)
    at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:105)
    at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:118)
    at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.visitArchive(ExplodedArchiveDescriptor.java:54)
    at org.hibernate.boot.archive.scan.spi.AbstractScannerImpl.scan(AbstractScannerImpl.java:47)
    at org.hibernate.boot.model.process.internal.ScanningCoordinator.coordinateScan(ScanningCoordinator.java:75)
    at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.prepare(MetadataBuildingProcess.java:98)
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:227)
    at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.<init>(EntityManagerFactoryBuilderImpl.java:169)
    at org.hibernate.jpa.boot.spi.Bootstrap.getEntityManagerFactoryBuilder(Bootstrap.java:36)
    at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilder(HibernatePersistenceProvider.java:181)
    at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:129)
    at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:71)
    at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:52)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)
    at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)

Answer 1

对我和 marc82ch 来说，问题是应用程序类路径上有大量文件(外部)。例如，在我的例子中，我的类路径中包含日志文件目录，其中包含大量文件。