为什么在处理第一次请求时，嵌入了tomcat的Springboot太慢? [英] Why my Springboot with embbeded tomcat too slow when process first request?
本文介绍了为什么在处理第一次请求时，嵌入了tomcat的Springboot太慢?的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
环境
OS:macOS Mojave版本10.14.5(centOS存在相同问题)
OS:macOS Mojave Version 10.14.5(centOS have same problem)
Springboot:2.1.6.RELEASE(嵌入tomcat 9.0.21)，战争
Springboot:2.1.6.RELEASE(embedded tomcat 9.0.21),war
我是Spring Boot的新手，我认为这对构建我的项目很有帮助.现在我已经完成了它的工作，但是一个奇怪的现象困扰着我.我的项目花费大约5分钟来响应第一个请求，花费5分钟而不是5秒，第一次请求之后看起来很正常.这太慢了，所以我需要您的帮助.
I am a new player of Spring Boot, which I think is helpful to build my project. Now I have finish my work with it, but a strange phenomenon harass me. My project cost about 5 minutes to response to the first request, it costs 5 minutes not 5 seconds, the request after first seems normally. It was extraordinary slow, so I need some help from you.
在 jstack 的帮助下，我发现大部分时间都花在了做下面的事情上，就像在进行拆箱一样.
With the help of jstack I got that most of the time was cost to doing things below, same doing unpack war.
"http-nio-15281-exec-5" #105 daemon prio=5 os_prio=31 tid=0x00007f988eaff800 nid=0x13b03 runnable [0x0000700013218000]
java.lang.Thread.State: RUNNABLE
at java.util.zip.Inflater.inflateBytes(Native Method)
at java.util.zip.Inflater.inflate(Inflater.java:259)
- locked <0x00000007bac79ab0> (a java.util.zip.ZStreamRef)
at java.util.zip.InflaterInputStream.read(InflaterInputStream.java:152)
at java.util.zip.ZipInputStream.read(ZipInputStream.java:194)
at java.util.jar.JarInputStream.read(JarInputStream.java:207)
at java.util.zip.ZipInputStream.closeEntry(ZipInputStream.java:140)
at java.util.zip.ZipInputStream.getNextEntry(ZipInputStream.java:118)
at java.util.jar.JarInputStream.getNextEntry(JarInputStream.java:142)
at java.util.jar.JarInputStream.getNextJarEntry(JarInputStream.java:179)
at org.apache.catalina.webresources.JarWarResourceSet.getArchiveEntries(JarWarResourceSet.java:117)
- locked <0x00000007810e7770> (a java.lang.Object)
at org.apache.catalina.webresources.AbstractArchiveResourceSet.getResource(AbstractArchiveResourceSet.java:253)
at org.apache.catalina.webresources.StandardRoot.getResourceInternal(StandardRoot.java:282)
at org.apache.catalina.webresources.Cache.getResource(Cache.java:62)
at org.apache.catalina.webresources.StandardRoot.getResource(StandardRoot.java:217)
at org.apache.catalina.webresources.StandardRoot.getClassLoaderResource(StandardRoot.java:226)
at org.apache.catalina.loader.WebappClassLoaderBase.findClassInternal(WebappClassLoaderBase.java:2303)
at org.apache.catalina.loader.WebappClassLoaderBase.findClass(WebappClassLoaderBase.java:865)
at org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader.findClassIgnoringNotFound(TomcatEmbeddedWebappClassLoader.java:119)
at org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader.doLoadClass(TomcatEmbeddedWebappClassLoader.java:84)
at org.springframework.boot.web.embedded.tomcat.TomcatEmbeddedWebappClassLoader.loadClass(TomcatEmbeddedWebappClassLoader.java:66)
- locked <0x00000007af22a990> (a java.lang.Object)
at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1188)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at com.sun.beans.finder.ClassFinder.findClass(ClassFinder.java:67)
at com.sun.beans.finder.ClassFinder.findClass(ClassFinder.java:110)
at java.beans.Introspector.findCustomizerClass(Introspector.java:1301)
at java.beans.Introspector.getTargetBeanDescriptor(Introspector.java:1295)
at java.beans.Introspector.getBeanInfo(Introspector.java:425)
at java.beans.Introspector.getBeanInfo(Introspector.java:262)
at java.beans.Introspector.getBeanInfo(Introspector.java:204)
at org.springframework.beans.CachedIntrospectionResults.getBeanInfo(CachedIntrospectionResults.java:248)
at org.springframework.beans.CachedIntrospectionResults.<init>(CachedIntrospectionResults.java:273)
at org.springframework.beans.CachedIntrospectionResults.forClass(CachedIntrospectionResults.java:177)
at org.springframework.beans.BeanWrapperImpl.getCachedIntrospectionResults(BeanWrapperImpl.java:174)
at org.springframework.beans.BeanWrapperImpl.getLocalPropertyHandler(BeanWrapperImpl.java:230)
at org.springframework.beans.BeanWrapperImpl.getLocalPropertyHandler(BeanWrapperImpl.java:63)
at org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyValue(AbstractNestablePropertyAccessor.java:620)
at org.springframework.beans.AbstractNestablePropertyAccessor.getPropertyValue(AbstractNestablePropertyAccessor.java:612)
at org.springframework.data.util.DirectFieldAccessFallbackBeanWrapper.getPropertyValue(DirectFieldAccessFallbackBeanWrapper.java:52)
at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.getId(JpaMetamodelEntityInformation.java:154)
at org.springframework.data.repository.core.support.AbstractEntityInformation.isNew(AbstractEntityInformation.java:42)
at org.springframework.data.jpa.repository.support.JpaMetamodelEntityInformation.isNew(JpaMetamodelEntityInformation.java:233)
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:506)
at org.springframework.data.jpa.repository.support.SimpleJpaRepository.saveAndFlush(SimpleJpaRepository.java:521)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.data.repository.core.support.RepositoryComposition$RepositoryFragments.invoke(RepositoryComposition.java:359)
at org.springframework.data.repository.core.support.RepositoryComposition.invoke(RepositoryComposition.java:200)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$ImplementationMethodExecutionInterceptor.invoke(RepositoryFactorySupport.java:644)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.doInvoke(RepositoryFactorySupport.java:608)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.lambda$invoke$3(RepositoryFactorySupport.java:595)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor$$Lambda$641/1539038539.get(Unknown Source)
at org.springframework.data.repository.util.QueryExecutionConverters$$Lambda$640/28145535.apply(Unknown Source)
at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:595)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.data.projection.DefaultMethodInvokingMethodInterceptor.invoke(DefaultMethodInvokingMethodInterceptor.java:59)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.transaction.interceptor.TransactionInterceptor$$Lambda$636/1377160602.proceedWithInvocation(Unknown Source)
at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:295)
at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:98)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:139)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.data.jpa.repository.support.CrudMethodMetadataPostProcessor$CrudMethodMetadataPopulatingMethodInterceptor.invoke(CrudMethodMetadataPostProcessor.java:138)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:93)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.data.repository.core.support.SurroundingTransactionDetectorMethodInterceptor.invoke(SurroundingTransactionDetectorMethodInterceptor.java:61)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:186)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:212)
at com.sun.proxy.$Proxy125.saveAndFlush(Unknown Source)
推荐答案
我们面临着完全相同的问题，我花了相当长的时间解决这个问题，但是设法通过此配置文件解决了这个问题:
We were facing the exact same issue and I spent quite a good few days on it but managed to solve it with this configuration piece:
@Configuration
public class EmbeddedTomcatConfiguration {
@Bean
TomcatServletWebServerFactory tomcatFactory() {
return new TomcatServletWebServerFactory() {
@Override
protected void postProcessContext(Context context) {
context.setResources(new ExtractingRoot());
}
};
}
@Bean
public WebServerFactoryCustomizer<TomcatServletWebServerFactory> servletContainerCustomizer() {
return new WebServerFactoryCustomizer<TomcatServletWebServerFactory>() {
@Override
public void customize(TomcatServletWebServerFactory container) {
container.addContextCustomizers(
new TomcatContextCustomizer() {
@Override
public void customize(Context cntxt) {
cntxt.setReloadable(false);
}
});
}
};
}
}
这基本上可以做两件事...
This basically does 2 things...
- 它要求Tomcat不要丢弃已加载的类并进行刷新.
- 它告诉Tomcat在启动时提取软件包(需要更多的磁盘空间)，而不是进行扫描未提取的软件包.
这篇关于为什么在处理第一次请求时，嵌入了tomcat的Springboot太慢?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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