Java 弹簧&x2B;JPA PermGen内存不足
EDIT1:28/05/2014 我尝试更改驱动程序(mysql-connector-java-5.1.30-bin和ojdbc7) 在这两种情况下,内存都会泄漏。例如(使用Java VisualVM)使用ojdbc并查看最近的GC,我看到: oracle.djbc.driver.ClockSource$ThreadCachingBlockSource$BlockReleaser不是contextClassLoader的“免费” 使用Mysql我也有同样的问题(使用sql驱动程序) 原创帖子: 简单地配置spring和jpa,重启应用程序3/4次后,我的PermGen内存不足。使用Java VisualVM,我看到每次重启我都会有一个以上的类加载器(开始时我有4个类加载器,重启后我有5个类加载器,以此类推)。在我的WEB-INB中,我有任何库。我设置的唯一类是this(任何jsp和我执行逻辑的任何类,仅设置spring+jpa) Im使用Tomcat8+Java 7 SDK: 引导配置Java 弹簧&x2B;JPA PermGen内存不足,java,spring,hibernate,spring-mvc,jpa,Java,Spring,Hibernate,Spring Mvc,Jpa,EDIT1:28/05/2014 我尝试更改驱动程序(mysql-connector-java-5.1.30-bin和ojdbc7) 在这两种情况下,内存都会泄漏。例如(使用Java VisualVM)使用ojdbc并查看最近的GC,我看到: oracle.djbc.driver.ClockSource$ThreadCachingBlockSource$BlockReleaser不是contextClassLoader的“免费” 使用Mysql我也有同样的问题(使用sql驱动程序) 原创帖子:
@SuppressWarnings("unused")
@Order(1)
public class FrameworkBootstrap implements WebApplicationInitializer
{
@Override
public void onStartup(ServletContext container)
throws ServletException
{
container.getServletRegistration("default").addMapping("/resource/*");
AnnotationConfigWebApplicationContext rootContext =
new AnnotationConfigWebApplicationContext();
rootContext.register(RootContextConfiguration.class);
container.addListener(new ContextLoaderListener(rootContext));
AnnotationConfigWebApplicationContext webContext =
new AnnotationConfigWebApplicationContext();
webContext.register(WebServletContextConfiguration.class);
ServletRegistration.Dynamic dispatcher = container.addServlet(
"springWebDispatcher", new DispatcherServlet(webContext)
);
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
}
}
@Configuration
@EnableWebMvc
@ComponentScan(
basePackages = "it.dirimo.site",
useDefaultFilters = false,
includeFilters = @ComponentScan.Filter(WebController.class)
)
public class WebServletContextConfiguration extends WebMvcConfigurerAdapter
{
@Inject ApplicationContext applicationContext;
@Inject ObjectMapper objectMapper;
@Inject Marshaller marshaller;
@Inject Unmarshaller unmarshaller;
@Inject SpringValidatorAdapter validator;
@Override
public void configureMessageConverters(
List<HttpMessageConverter<?>> converters
) {
converters.add(new ByteArrayHttpMessageConverter());
converters.add(new StringHttpMessageConverter());
converters.add(new FormHttpMessageConverter());
converters.add(new SourceHttpMessageConverter<>());
MarshallingHttpMessageConverter xmlConverter =
new MarshallingHttpMessageConverter();
xmlConverter.setSupportedMediaTypes(Arrays.asList(
new MediaType("application", "xml"),
new MediaType("text", "xml"),
new MediaType("text", "json")
));
xmlConverter.setMarshaller(this.marshaller);
xmlConverter.setUnmarshaller(this.unmarshaller);
converters.add(xmlConverter);
MappingJackson2HttpMessageConverter jsonConverter =
new MappingJackson2HttpMessageConverter();
jsonConverter.setSupportedMediaTypes(Arrays.asList(
new MediaType("application", "json"),
new MediaType("text", "json")
));
jsonConverter.setObjectMapper(this.objectMapper);
converters.add(jsonConverter);
}
@Override
public void configureContentNegotiation(
ContentNegotiationConfigurer configurer)
{
configurer.favorPathExtension(true).favorParameter(false)
.parameterName("mediaType").ignoreAcceptHeader(false)
.useJaf(false).defaultContentType(MediaType.APPLICATION_XML)
.mediaType("xml", MediaType.APPLICATION_XML)
.mediaType("json", MediaType.APPLICATION_JSON);
}
@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers)
{
Sort defaultSort = new Sort(new Sort.Order(Sort.Direction.ASC, "id"));
Pageable defaultPageable = new PageRequest(0, 10, defaultSort);
SortHandlerMethodArgumentResolver sortResolver =
new SortHandlerMethodArgumentResolver();
sortResolver.setSortParameter("paging.sort");
sortResolver.setFallbackSort(defaultSort);
PageableHandlerMethodArgumentResolver pageableResolver =
new PageableHandlerMethodArgumentResolver(sortResolver);
pageableResolver.setMaxPageSize(100);
pageableResolver.setOneIndexedParameters(true);
pageableResolver.setPrefix("paging.");
pageableResolver.setFallbackPageable(defaultPageable);
resolvers.add(sortResolver);
resolvers.add(pageableResolver);
}
@Override
public void addFormatters(FormatterRegistry registry)
{
if(!(registry instanceof FormattingConversionService))
{
return;
}
DomainClassConverter<FormattingConversionService> converter =
new DomainClassConverter<>((FormattingConversionService)registry);
converter.setApplicationContext(this.applicationContext);
}
@Override
public Validator getValidator()
{
return this.validator;
}
@Override
public void addInterceptors(InterceptorRegistry registry)
{
super.addInterceptors(registry);
registry.addInterceptor(new LocaleChangeInterceptor());
}
@Bean
public LocaleResolver localeResolver()
{
return new SessionLocaleResolver();
}
@Bean
public ViewResolver viewResolver()
{
InternalResourceViewResolver resolver =
new InternalResourceViewResolver();
resolver.setViewClass(JstlView.class);
resolver.setPrefix("/WEB-INF/jsp/view/");
resolver.setSuffix(".jsp");
return resolver;
}
@Bean
public RequestToViewNameTranslator viewNameTranslator()
{
return new DefaultRequestToViewNameTranslator();
}
}
@Configuration
@EnableScheduling
@EnableLoadTimeWeaving
@EnableAsync(
mode = AdviceMode.PROXY, proxyTargetClass = true,
order = 1
)
@EnableTransactionManagement(
mode = AdviceMode.PROXY, proxyTargetClass = true,
order = 2
)
@EnableJpaRepositories(
basePackages = "it.dirimo.site.repositories",
entityManagerFactoryRef = "entityManagerFactoryBean",
transactionManagerRef = "jpaTransactionManager"
)
@ComponentScan(
basePackages = "it.dirimo.site",
excludeFilters =
@ComponentScan.Filter({Controller.class, ControllerAdvice.class})
)
public class RootContextConfiguration implements AsyncConfigurer, SchedulingConfigurer
{
//private static final Logger log = LogManager.getLogger();
@Inject LoadTimeWeaver loadTimeWeaver;
@Bean
public MessageSource messageSource()
{
ReloadableResourceBundleMessageSource messageSource =
new ReloadableResourceBundleMessageSource();
messageSource.setCacheSeconds(-1);
messageSource.setDefaultEncoding(StandardCharsets.UTF_8.name());
messageSource.setBasenames(
"/WEB-INF/i18n/titles", "/WEB-INF/i18n/messages",
"/WEB-INF/i18n/errors", "/WEB-INF/i18n/validation"
);
return messageSource;
}
@Bean
public LocalValidatorFactoryBean localValidatorFactoryBean()
{
LocalValidatorFactoryBean validator = new LocalValidatorFactoryBean();
validator.setValidationMessageSource(this.messageSource());
return validator;
}
@Bean
public MethodValidationPostProcessor methodValidationPostProcessor()
{
MethodValidationPostProcessor processor =
new MethodValidationPostProcessor();
processor.setValidator(this.localValidatorFactoryBean());
return processor;
}
@Bean
public ObjectMapper objectMapper()
{
ObjectMapper mapper = new ObjectMapper();
mapper.findAndRegisterModules();
mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
mapper.configure(DeserializationFeature.ADJUST_DATES_TO_CONTEXT_TIME_ZONE,
false);
return mapper;
}
@Bean
public Jaxb2Marshaller jaxb2Marshaller()
{
Jaxb2Marshaller marshaller = new Jaxb2Marshaller();
marshaller.setPackagesToScan(new String[] { "it.dirimo.site" });
return marshaller;
}
@Bean
public DataSource fileSearchDataSource()
{
JndiDataSourceLookup lookup = new JndiDataSourceLookup();
return lookup.getDataSource("jdbc/DIR");
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean()
{
Map<String, Object> properties = new Hashtable<>();
properties.put("javax.persistence.schema-generation.database.action",
"none");
properties.put("hibernate.ejb.use_class_enhancer", "true");
HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
adapter.setDatabasePlatform("org.hibernate.dialect.Oracle10gDialect");
LocalContainerEntityManagerFactoryBean factory =
new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(adapter);
factory.setDataSource(this.fileSearchDataSource());
factory.setPackagesToScan("it.dirimo.site.entities");
factory.setSharedCacheMode(SharedCacheMode.ENABLE_SELECTIVE);
factory.setValidationMode(ValidationMode.NONE);
factory.setLoadTimeWeaver(this.loadTimeWeaver);
factory.setJpaPropertyMap(properties);
return factory;
}
@Bean
public PlatformTransactionManager jpaTransactionManager()
{
return new JpaTransactionManager(
this.entityManagerFactoryBean().getObject()
);
}
@Bean
public ThreadPoolTaskScheduler taskScheduler()
{
ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
scheduler.setPoolSize(20);
scheduler.setThreadNamePrefix("task-");
scheduler.setAwaitTerminationSeconds(60);
scheduler.setWaitForTasksToCompleteOnShutdown(true);
return scheduler;
}
@Override
public void configureTasks(ScheduledTaskRegistrar registrar) {
TaskScheduler scheduler = this.taskScheduler();
registrar.setTaskScheduler(scheduler);
}
@Override
public Executor getAsyncExecutor() {
Executor executor = this.taskScheduler();
return executor;
}
}
Servlet配置
@SuppressWarnings("unused")
@Order(1)
public class FrameworkBootstrap implements WebApplicationInitializer
{
@Override
public void onStartup(ServletContext container)
throws ServletException
{
container.getServletRegistration("default").addMapping("/resource/*");
AnnotationConfigWebApplicationContext rootContext =
new AnnotationConfigWebApplicationContext();
rootContext.register(RootContextConfiguration.class);
container.addListener(new ContextLoaderListener(rootContext));
AnnotationConfigWebApplicationContext webContext =
new AnnotationConfigWebApplicationContext();
webContext.register(WebServletContextConfiguration.class);
ServletRegistration.Dynamic dispatcher = container.addServlet(
"springWebDispatcher", new DispatcherServlet(webContext)
);
dispatcher.setLoadOnStartup(1);
dispatcher.addMapping("/");
}
}
@Configuration
@EnableWebMvc
@ComponentScan(
basePackages = "it.dirimo.site",
useDefaultFilters = false,
includeFilters = @ComponentScan.Filter(WebController.class)
)
public class WebServletContextConfiguration extends WebMvcConfigurerAdapter
{
@Inject ApplicationContext applicationContext;
@Inject ObjectMapper objectMapper;
@Inject Marshaller marshaller;
@Inject Unmarshaller unmarshaller;
@Inject SpringValidatorAdapter validator;
@Override
public void configureMessageConverters(
List<HttpMessageConverter<?>> converters
) {
converters.add(new ByteArrayHttpMessageConverter());
converters.add(new StringHttpMessageConverter());
converters.add(new FormHttpMessageConverter());
converters.add(new SourceHttpMessageConverter<>());
MarshallingHttpMessageConverter xmlConverter =
new MarshallingHttpMessageConverter();
xmlConverter.setSupportedMediaTypes(Arrays.asList(
new MediaType("application", "xml"),
new MediaType("text", "xml"),
new MediaType("text", "json")
));
xmlConverter.setMarshaller(this.marshaller);
xmlConverter.setUnmarshaller(this.unmarshaller);
converters.add(xmlConverter);
MappingJackson2HttpMessageConverter jsonConverter =
new MappingJackson2HttpMessageConverter();
jsonConverter.setSupportedMediaTypes(Arrays.asList(
new MediaType("application", "json"),
new MediaType("text", "json")
));
jsonConverter.setObjectMapper(this.objectMapper);
converters.add(jsonConverter);
}
@Override
public void configureContentNegotiation(
ContentNegotiationConfigurer configurer)
{
configurer.favorPathExtension(true).favorParameter(false)
.parameterName("mediaType").ignoreAcceptHeader(false)
.useJaf(false).defaultContentType(MediaType.APPLICATION_XML)
.mediaType("xml", MediaType.APPLICATION_XML)
.mediaType("json", MediaType.APPLICATION_JSON);
}
@Override
public void addArgumentResolvers(List<HandlerMethodArgumentResolver> resolvers)
{
Sort defaultSort = new Sort(new Sort.Order(Sort.Direction.ASC, "id"));
Pageable defaultPageable = new PageRequest(0, 10, defaultSort);
SortHandlerMethodArgumentResolver sortResolver =
new SortHandlerMethodArgumentResolver();
sortResolver.setSortParameter("paging.sort");
sortResolver.setFallbackSort(defaultSort);
PageableHandlerMethodArgumentResolver pageableResolver =
new PageableHandlerMethodArgumentResolver(sortResolver);
pageableResolver.setMaxPageSize(100);
pageableResolver.setOneIndexedParameters(true);
pageableResolver.setPrefix("paging.");
pageableResolver.setFallbackPageable(defaultPageable);
resolvers.add(sortResolver);
resolvers.add(pageableResolver);
}
@Override
public void addFormatters(FormatterRegistry registry)
{
if(!(registry instanceof FormattingConversionService))
{
return;
}
DomainClassConverter<FormattingConversionService> converter =
new DomainClassConverter<>((FormattingConversionService)registry);
converter.setApplicationContext(this.applicationContext);
}
@Override
public Validator getValidator()
{
return this.validator;
}
@Override
public void addInterceptors(InterceptorRegistry registry)
{
super.addInterceptors(registry);
registry.addInterceptor(new LocaleChangeInterceptor());
}
@Bean
public LocaleResolver localeResolver()
{
return new SessionLocaleResolver();
}
@Bean
public ViewResolver viewResolver()
{
InternalResourceViewResolver resolver =
new InternalResourceViewResolver();
resolver.setViewClass(JstlView.class);
resolver.setPrefix("/WEB-INF/jsp/view/");
resolver.setSuffix(".jsp");
return resolver;
}
@Bean
public RequestToViewNameTranslator viewNameTranslator()
{
return new DefaultRequestToViewNameTranslator();
}
}
@Configuration
@EnableScheduling
@EnableLoadTimeWeaving
@EnableAsync(
mode = AdviceMode.PROXY, proxyTargetClass = true,
order = 1
)
@EnableTransactionManagement(
mode = AdviceMode.PROXY, proxyTargetClass = true,
order = 2
)
@EnableJpaRepositories(
basePackages = "it.dirimo.site.repositories",
entityManagerFactoryRef = "entityManagerFactoryBean",
transactionManagerRef = "jpaTransactionManager"
)
@ComponentScan(
basePackages = "it.dirimo.site",
excludeFilters =
@ComponentScan.Filter({Controller.class, ControllerAdvice.class})
)
public class RootContextConfiguration implements AsyncConfigurer, SchedulingConfigurer
{
//private static final Logger log = LogManager.getLogger();
@Inject LoadTimeWeaver loadTimeWeaver;
@Bean
public MessageSource messageSource()
{
ReloadableResourceBundleMessageSource messageSource =
new ReloadableResourceBundleMessageSource();
messageSource.setCacheSeconds(-1);
messageSource.setDefaultEncoding(StandardCharsets.UTF_8.name());
messageSource.setBasenames(
"/WEB-INF/i18n/titles", "/WEB-INF/i18n/messages",
"/WEB-INF/i18n/errors", "/WEB-INF/i18n/validation"
);
return messageSource;
}
@Bean
public LocalValidatorFactoryBean localValidatorFactoryBean()
{
LocalValidatorFactoryBean validator = new LocalValidatorFactoryBean();
validator.setValidationMessageSource(this.messageSource());
return validator;
}
@Bean
public MethodValidationPostProcessor methodValidationPostProcessor()
{
MethodValidationPostProcessor processor =
new MethodValidationPostProcessor();
processor.setValidator(this.localValidatorFactoryBean());
return processor;
}
@Bean
public ObjectMapper objectMapper()
{
ObjectMapper mapper = new ObjectMapper();
mapper.findAndRegisterModules();
mapper.configure(SerializationFeature.WRITE_DATES_AS_TIMESTAMPS, false);
mapper.configure(DeserializationFeature.ADJUST_DATES_TO_CONTEXT_TIME_ZONE,
false);
return mapper;
}
@Bean
public Jaxb2Marshaller jaxb2Marshaller()
{
Jaxb2Marshaller marshaller = new Jaxb2Marshaller();
marshaller.setPackagesToScan(new String[] { "it.dirimo.site" });
return marshaller;
}
@Bean
public DataSource fileSearchDataSource()
{
JndiDataSourceLookup lookup = new JndiDataSourceLookup();
return lookup.getDataSource("jdbc/DIR");
}
@Bean
public LocalContainerEntityManagerFactoryBean entityManagerFactoryBean()
{
Map<String, Object> properties = new Hashtable<>();
properties.put("javax.persistence.schema-generation.database.action",
"none");
properties.put("hibernate.ejb.use_class_enhancer", "true");
HibernateJpaVendorAdapter adapter = new HibernateJpaVendorAdapter();
adapter.setDatabasePlatform("org.hibernate.dialect.Oracle10gDialect");
LocalContainerEntityManagerFactoryBean factory =
new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(adapter);
factory.setDataSource(this.fileSearchDataSource());
factory.setPackagesToScan("it.dirimo.site.entities");
factory.setSharedCacheMode(SharedCacheMode.ENABLE_SELECTIVE);
factory.setValidationMode(ValidationMode.NONE);
factory.setLoadTimeWeaver(this.loadTimeWeaver);
factory.setJpaPropertyMap(properties);
return factory;
}
@Bean
public PlatformTransactionManager jpaTransactionManager()
{
return new JpaTransactionManager(
this.entityManagerFactoryBean().getObject()
);
}
@Bean
public ThreadPoolTaskScheduler taskScheduler()
{
ThreadPoolTaskScheduler scheduler = new ThreadPoolTaskScheduler();
scheduler.setPoolSize(20);
scheduler.setThreadNamePrefix("task-");
scheduler.setAwaitTerminationSeconds(60);
scheduler.setWaitForTasksToCompleteOnShutdown(true);
return scheduler;
}
@Override
public void configureTasks(ScheduledTaskRegistrar registrar) {
TaskScheduler scheduler = this.taskScheduler();
registrar.setTaskScheduler(scheduler);
}
@Override
public Executor getAsyncExecutor() {
Executor executor = this.taskScheduler();
return executor;
}
}
@配置
@EnableWebMvc
@组件扫描(
basePackages=“it.dirimo.site”,
useDefaultFilters=false,
includeFilters=@ComponentScan.Filter(WebController.class)
)
公共类WebServletContextConfiguration扩展了WebMVCConfigureAdapter
{
@注入ApplicationContext ApplicationContext;
@注入ObjectMapper ObjectMapper;
@注入马歇尔勒;
@注入解组器解组器;
@注入SpringValidator适配器验证程序;
@凌驾
公共无效配置MessageConverters(
列表这是Tomcat/Spring/Hibernate的一个常见问题,通常没有适用于所有场景的明确答案。最有可能的是,在每次重新部署时都会创建动态类,存储在permgen中,并且类定义从来不会被垃圾收集。这通常不是di这实际上是Spring/Hibernate的一个bug,而是CGLIB和/或Tomcat的类加载器处理的“特性”
一些常见的建议:
- 将
-XX:+cmsclasssunloadingerabled-XX:+cmsclasssweapingenabled
添加到tomcat启动选项中
- 如果这是问题的原因,请远离CGLIB。CGLIB仅用于某些代理类型
- 将JDBCJAR文件放在{tomcat}/lib中,而不是WEB-INF/lib中
互联网上还有很多其他的想法和方法,但一般来说,如果你无法解决上述问题,那么唯一的办法就是增加你的permgen,并计划每隔这么多次重新部署就重新启动tomcat
有趣的是(根据我自己的经验),这个问题在最新的library/server/jdk版本中并不是什么问题。听起来可能是Tomcat 8中的一个bug。我已经在Tomcat 7上发布了它,并删除了@EnableLoadTimeWeaving。启动后(没有安装任何其他应用程序).Perm-Gen大约是37 MB。看了之后,我只需重新加载应用程序,Perm-Gen转到54.63。在第三次重新加载时,Perm-Gen的容量为72 MB(如前所述,应用程序完全为空,没有页面或服务)。使用Java VisualVM,如果我在未启动的实例上“显示最近的GC”,我会看到:classLoader->assertionLock(循环到此..任何一种方法都不能解决问题:(但好吧,我想我经常会重新启动应用程序服务器。但是,还有另一个问题。每次我调用一个执行数据库查询的方法时,PermGen都会增加,而不会减少。对于每个请求(DB connection->search)我有一个增加,从来没有减少…这是正常的..?在Tomcat 8+Java 8上部署它并使用最新的库(使用Tomcat/lib中的CMSClassUnloadingEnabled和mysql/ojdbc驱动程序)并不能解决问题。