关于tomcat:问题记录TomcatTomcat启动报错Possiblefor-Xss-and-illegal

Tomcat启动报错：Possible root causes include a too low setting for -Xss and illegal cyclic inheritance dependencies

错误代码如下：

Caused by: java.lang.IllegalStateException: Unable to complete the scan for annotations for web application [] due to a StackOverflowError. Possible root causes include a too low setting for -Xss and illegal cyclic inheritance dependencies. The class hierarchy being processed was [org.bouncycastle.asn1.ASN1Boolean->org.bouncycastle.asn1.DERBoolean->org.bouncycastle.asn1.ASN1Boolean]    at org.apache.catalina.startup.ContextConfig.checkHandlesTypes(ContextConfig.java:2139)    at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2083)    at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:2029)    at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1999)    at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1952)    at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1156)    at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:765)    at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:299)    at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4989)    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)    ... 42 more

网上给的答案都是调整Xss参数，其实不是正确的做法，

-Xss：每个线程的Stack大小，“-Xss 15120” 这使得tomcat每减少一个线程（thread)就会立刻耗费15M内存，而最佳值应该是128K,默认值如同是512k.

具体报错如下

Caused by: java.lang.IllegalStateException: Unable to complete the scan for annotations for web application [] due to a StackOverflowError. Possible root causes include a too low setting for -Xss and illegal cyclic inheritance dependencies. The class hierarchy being processed was [org.bouncycastle.asn1.ASN1EncodableVector->org.bouncycastle.asn1.DEREncodableVector->org.bouncycastle.asn1.ASN1EncodableVe
ctor]

因为tomcat启动会去扫描jar包，看错误信息org.bouncycastle.asn1.ASN1EncodableVector，是出在这个类

这个相似呈现在bcprov*.jar这个包

所以在tomcat的conf目录外面catalina.properties的文件，

在tomcat.util.scan.DefaultJarScanner.jarsToSkip=外面加上bcprov*.jar过滤

启动不会报错了

或者降级tomcat版本（相对解决）
借鉴:https://www.cnblogs.com/miaoy...