Hibernate 3 maven插件hbm2ddl非常慢

我正在使用hibernate 3 maven插件爲使用JPA實體的模式生成DDL。它一切正常，但插件執行大約需要3-4分鐘才能執行。Hibernate 3 maven插件hbm2ddl非常慢

Class path contains multiple SLF4J bindings. 
SLF4J: Found binding in [jar:file:/C:/Users/user15273/.m2/repository/org/slf4j/slf4j- nop/1.6.1/slf4j-nop-1.6.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] 
SLF4J: Found binding in [jar:file:/C:/Users/user15273/.m2/repository/org/slf4j/slf4j-jdk14/1.5.6/slf4j-jdk14-1.5.6.jar!/org/slf4j/impl/StaticLoggerBinder.class] 
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. 
[INFO] Executed tasks

我試着用-X標誌運行maven，看看它在打印後面的輸出後卡住了一會兒。

main: 
    Class org.hibernate.tool.ant.HibernateToolTask loaded from parent loader (parentFirst) 
    +Datatype hibernatetool org.hibernate.tool.ant.HibernateToolTask 
     [mkdir] Created dir: C:\user15273\MySource\Workspace\NewSourceCode\Entity\target\sql\hibernate3 
    [hibernatetool] Executing Hibernate Tool with a JPA Configuration 
    [hibernatetool] 1. task: hbm2ddl (Generates database schema) 
    SLF4J: Class path contains multiple SLF4J bindings. 
    SLF4J: Found binding in [jar:file:/C:/Users/user15273/.m2/repository/org/slf4j/slf4j-nop/1.6.1/slf4j-nop-1.6.1.jar!/org/slf4j/impl/StaticLoggerBinder.class] 
    SLF4J: Found binding in [jar:file:/C:/Users/user15273/.m2/repository/org/slf4j/slf4j-jdk14/1.5.6/slf4j-jdk14-1.5.6.jar!/org/slf4j/impl/StaticLoggerBinder.class] 
    SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation. 
    Class org.hibernate.ejb.Ejb3Configuration loaded from parent loader (parentFirst) 
    Couldn't load ResourceStream for commons-logging.properties 
    ResourceStream for META-INF/services/org.apache.commons.logging.LogFactory loaded from parent loader 
    Class org.apache.commons.logging.impl.SLF4JLogFactory loaded from parent loader (parentFirst) 
    Couldn't load ResourceStream for hibernate.properties 
    Couldn't load ResourceStream for META-INF/services/javax.xml.parsers.DocumentBuilderFactory 
    Class com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderFactoryImpl loaded from parent loader (parentFirst) 
    Class com.sun.org.apache.xerces.internal.impl.dv.dtd.DTDDVFactoryImpl loaded from parent loader (parentFirst) 
    Class com.sun.org.apache.xerces.internal.impl.dv.dtd.DTDDVFactoryImpl loaded from parent loader (parentFirst) 
    Class com.sun.org.apache.xerces.internal.impl.dv.xs.SchemaDVFactoryImpl loaded from parent loader (parentFirst) 
    Class com.sun.org.apache.xerces.internal.impl.dv.xs.ExtendedSchemaDVFactoryImpl loaded from parent loader (parentFirst) 
    Class com.sun.org.apache.xerces.internal.impl.dv.xs.SchemaDVFactoryImpl loaded from parent loader (parentFirst) 
    Class com.sun.org.apache.xerces.internal.impl.dv.dtd.DTDDVFactoryImpl loaded from parent loader (parentFirst) 
    Class com.sun.org.apache.xerces.internal.impl.dv.xs.SchemaDVFactoryImpl loaded from parent loader (parentFirst)

有沒有人有任何想法如何找出這種延遲的原因或如何解決這個問題？ TIA。

來源

2013-11-23 user451445

此排除已被添加。並且它不失敗的任何依賴。它只是掛了一段時間，並在一段時間後醒來完成該過程。我正在試圖分析這個過程，看看我能否看到線程在做什麼。如果有人有任何其他想法，請讓我知道。謝謝。 – user451445

我已經解決了問題現在。分析了Maven進程的線程轉儲，發現線程在套接字連接上處於WAITING狀態。在更多的分析中，我發現它是xerces類嘗試下載持久性XSD。

因爲我沒有使用具有該XSD的Hibernate實體jar版本，所以我不得不手動將XSD放置在項目結構中。現在構建可以回到幾分鐘。

來源

2013-11-23 21:11:37 user451445

如果依賴聲明需要添加排除項。使用一種機制來生成依賴關係圖，例如在IDE IntelliJ Idea中。

http://blog.jetbrains.com/idea/2010/05/maven-dependencies-diagram/

您需要了解的依賴性包括庫所需的版本和排除：

Maven: how to use exclusions.

例如：

<dependencies> 
    <dependency> 
     <groupId>group</groupId> 
     <artifactId>artifact</artifactId> 
     <version>version</version> 
     <scope>compile</scope> 
     <exclusions> 
     <exclusion> 
      <groupId>org.slf4j</groupId> 
      <artifactId>slf4j-jdk14</artifactId> 
     </exclusion> 
     </exclusions> 
    </dependency> 
    </dependencies>

來源

2013-11-23 15:28:56 Mark

Hibernate 3 maven插件hbm2ddl非常慢

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