我使用Liferay从Javaoss升级到WildFly 9，从Java 7升级到Java 8.我还将postgresql jdbc驱动程序更新为版本9.4-1207。
从那时起，我无法部署我的应用程序，因为它会抛出以下错误：
2016-03-30 10:02:07,404 INFO [org.jboss.as.jpa] (ServerService Thread Pool -- 201) WFLYJPA0010: Starting Persistence Unit (phase 2 of 2) Service 'TestEJBsWithArquillian.war#at.testapplication.jpa'
2016-03-30 10:02:08,544 ERROR [org.jboss.msc.service.fail] (ServerService Thread Pool -- 201) MSC000001: Failed to start service jboss.persistenceunit."TestEJBsWithArquillian.war#at.testapplication.jpa": org.jboss.msc.service.StartException in service jboss.persistenceunit."TestEJBsWithArquillian.war#at.testapplication.jpa": java.lang.NullPointerException
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:172)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:117)
at org.wildfly.security.manager.WildFlySecurityManager.doChecked(WildFlySecurityManager.java:665)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1.run(PersistenceUnitServiceImpl.java:182)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
at org.jboss.threads.JBossThread.run(JBossThread.java:320)
Caused by: java.lang.NullPointerException
at org.postgresql.jdbc.TypeInfoCache.getSQLType(TypeInfoCache.java:185)
at org.postgresql.jdbc.TypeInfoCache.getSQLType(TypeInfoCache.java:180)
at org.postgresql.jdbc.TypeInfoCache.requiresQuoting(TypeInfoCache.java:823)
at org.postgresql.jdbc.PgDatabaseMetaData.getTypeInfo(PgDatabaseMetaData.java:2952)
at org.hibernate.engine.jdbc.spi.TypeInfo.extractTypeInfo(TypeInfo.java:101)
at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:163)
at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234)
at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206)
at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887)
at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850)
at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425)
at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849)
at org.jboss.as.jpa.hibernate4.TwoPhaseBootstrapImpl.build(TwoPhaseBootstrapImpl.java:44)
at org.jboss.as.jpa.service.PersistenceUnitServiceImpl$1$1.run(PersistenceUnitServiceImpl.java:154)
... 7 more
我有以下persistence.xml：
<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" xmlns="http://java.sun.com/xml/ns/persistence"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_2_0.xsd">
<persistence-unit name="at.testapplication.jpa" transaction-type="JTA">
<provider>org.hibernate.jpa.HibernatePersistenceProvider</provider>
<jta-data-source>jdbc/databasePool</jta-data-source>
<exclude-unlisted-classes>false</exclude-unlisted-classes>
<shared-cache-mode>ALL</shared-cache-mode>
<validation-mode>AUTO</validation-mode>
<properties>
<property name="hibernate.hbm2ddl.auto" value="validate"/>
<property name="hibernate.show_sql" value="false"/>
<property name="hibernate.jdbc.batch_size" value="10"/>
<property name="hibernate.jdbc.fetch_size" value="10"/>
<property name="hibernate.dialect" value="${testapplication.database.dialect}"/>
<property name="hibernate.transaction.manager_lookup_class"
value="org.hibernate.transaction.JBossTransactionManagerLookup"/>
<property name="hibernate.transaction.jta.platform"
value="org.hibernate.service.jta.platform.internal.JBossAppServerJtaPlatform" />
<property name="hibernate.search.default.directory_provider" value="filesystem"/>
<property name="hibernate.search.default.indexBase" value="${liferay.home}/data/lucene"/>
<property name="hibernate.cache.use_second_level_cache" value="false"/>
<property name="hibernate.cache.use_query_cache" value="false"/>
</properties>
</persistence-unit>
</persistence>
这是standalone.xml（我可以从wildfly管理界面ping数据源）：
<subsystem xmlns="urn:jboss:domain:datasources:3.0">
<datasources>
<datasource jta="true" jndi-name="java:/jdbc/databasePool" pool-name="databasePool" enabled="true" use-java-context="true" use-ccm="true">
<connection-url>jdbc:postgresql://localhost/db</connection-url>
<driver>postgresql</driver>
<security>
<user-name>admin</user-name>
<password>admin</password>
</security>
<validation>
<valid-connection-checker class-name="org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLValidConnectionChecker"/>
<exception-sorter class-name="org.jboss.jca.adapters.jdbc.extensions.postgres.PostgreSQLExceptionSorter"/>
</validation>
</datasource>
<drivers>
<driver name="postgresql" module="org.postgresql">
<datasource-class>org.postgresql.ds.PGConnectionPolDataSource</datasource-class>
</driver>
</drivers>
</datasources>
</subsystem>
我可以从Wildfly管理界面ping我的databasePool。有谁知道可能导致这种情况的原因是什么？看起来JDBC驱动程序抛出了NullPointerException。我也尝试过其他版本的JDBC驱动程序，但它仍然会抛出相同的错误。
答案 0 :(得分：2)
好吧，事实证明我的数据库元数据已损坏。从同事恢复数据库后，部署的应用程序就好了。