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                                                    <th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Change By:</th> 
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                                                    <td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <span class="diffcontext">This is originaly asked on StackOverflow<br><br>https://stackoverflow.com/questions/44152772/jpa-hibernate-hangs-on-native-filesystem-operations-during-boot<br><br>In general, during application bootstrap (and EntityManagerFactory creation) Hibernate hangs without throwing any error nor exception. Logs on TRACE level are not much of a help. Thread dump show that this is due to some file system operations. Eventlually application will resume working (without any errorss) after random 10seconds or 30&gt; minutes.<br><br></span> <span class="diffaddedchars" style="background-color:#ddfade;">As far as I can tell, there is some sort of recursive calling.</span> <span class="diffcontext"><br></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br></span> <span class="diffcontext">Dumped thread:<br>{noformat}<br>&nbsp;&nbsp;&nbsp;java.lang.Thread.State: RUNNABLE<br> at java.io.UnixFileSystem.list(Native Method)<br> at java.io.File.list(File.java:1122)<br> at java.io.File.listFiles(File.java:1207)<br> at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:105)<br> at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:118)<br> at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.visitArchive(ExplodedArchiveDescriptor.java:54)<br> at org.hibernate.boot.archive.scan.spi.AbstractScannerImpl.scan(AbstractScannerImpl.java:47)<br> at org.hibernate.boot.model.process.internal.ScanningCoordinator.coordinateScan(ScanningCoordinator.java:75)<br> at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.prepare(MetadataBuildingProcess.java:98)<br> at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.&lt;init&gt;(EntityManagerFactoryBuilderImpl.java:227)<br> at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.&lt;init&gt;(EntityManagerFactoryBuilderImpl.java:169)<br> at org.hibernate.jpa.boot.spi.Bootstrap.getEntityManagerFactoryBuilder(Bootstrap.java:36)<br> at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilder(HibernatePersistenceProvider.java:181)<br> at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:129)<br> at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:71)<br> at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:52)<br> at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)<br> at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)<br> at pl.choina.jpa.PersistenceUtils.createEntityManagerFactory(PersistenceUtils.java:42)<br><br>{noformat}<br><br>Bootstrap logging on trace level:<br>{noformat}<br>"main" #1 prio=5 os_prio=0 tid=0x00000000010c9000 nid=0x2c73 runnable [0x00007f4c928f5000]<br>&nbsp;&nbsp;&nbsp;java.lang.Thread.State: RUNNABLE<br>&nbsp;&nbsp;&nbsp;&nbsp;at java.io.UnixFileSystem.list(Native Method)<br>&nbsp;&nbsp;&nbsp;&nbsp;at java.io.File.list(File.java:1122)<br>&nbsp;&nbsp;&nbsp;&nbsp;at java.io.File.listFiles(File.java:1207)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:105)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.processDirectory(ExplodedArchiveDescriptor.java:118)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.boot.archive.internal.ExplodedArchiveDescriptor.visitArchive(ExplodedArchiveDescriptor.java:54)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.boot.archive.scan.spi.AbstractScannerImpl.scan(AbstractScannerImpl.java:47)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.boot.model.process.internal.ScanningCoordinator.coordinateScan(ScanningCoordinator.java:75)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.boot.model.process.spi.MetadataBuildingProcess.prepare(MetadataBuildingProcess.java:98)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.&lt;init&gt;(EntityManagerFactoryBuilderImpl.java:227)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.&lt;init&gt;(EntityManagerFactoryBuilderImpl.java:169)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.jpa.boot.spi.Bootstrap.getEntityManagerFactoryBuilder(Bootstrap.java:36)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilder(HibernatePersistenceProvider.java:181)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:129)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.jpa.HibernatePersistenceProvider.getEntityManagerFactoryBuilderOrNull(HibernatePersistenceProvider.java:71)<br>&nbsp;&nbsp;&nbsp;&nbsp;at org.hibernate.jpa.HibernatePersistenceProvider.createEntityManagerFactory(HibernatePersistenceProvider.java:52)<br>&nbsp;&nbsp;&nbsp;&nbsp;at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:55)<br>&nbsp;&nbsp;&nbsp;&nbsp;at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:39)<br>{noformat}<br><br>Maven dependecies:<br>{noformat}<br>&lt;dependency&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;groupId&gt;org.hibernate&lt;/groupId&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;artifactId&gt;hibernate-core&lt;/artifactId&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;version&gt;${hibernate.version}&lt;/version&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/dependency&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;dependency&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;groupId&gt;org.hibernate&lt;/groupId&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;artifactId&gt;hibernate-jpamodelgen&lt;/artifactId&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;version&gt;${hibernate.version}&lt;/version&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/dependency&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;dependency&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;groupId&gt;org.hibernate&lt;/groupId&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;artifactId&gt;hibernate-c3p0&lt;/artifactId&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;version&gt;${hibernate.version}&lt;/version&gt;<br>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&lt;/dependency&gt;<br>{noformat}<br>with hibernate.version=5.2.10.Final</span> </td> 
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