記錄遇到一次奇怪的錯誤，在發佈war包到Tomcat的時候，出現了org.bouncycastle.asn1.ASN1Boolean非法循環依賴的錯誤。
INFO: Deploying web application directory /data/w/www/xxx-app/webapps/ROOT
Apr 02, 2019 9:59:52 PM org.apache.catalina.core.ContainerBase addChildInternal
SEVERE: ContainerBase.addChild: start:
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[]]
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1120)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1678)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
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)
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:2188)
at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2135)
at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:2010)
at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1976)
at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1961)
at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1319)
at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)
at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:376)
at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)
at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5322)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
... 10 more
現象：
第一次部署，第一臺機器沒有問題，第二臺機器報錯。
第二次部署，第一臺和第二臺沒有問題，第三臺報錯了。
也就是說，出現錯誤是不確定的.....
錯誤原因：依賴衝突，bcprov-jdk15on-x.xx.jar and bcprov-jdk16-x.xx.jar 的衝突導致
解決方法：
將bcprov-jdk16-x.xx.jar 排除，注意這裏一定要排除jdk16的這個jar包，因爲我在排除了第一個jar包之後，還是出現了這個錯誤，後來exclude掉bcprov-jdk16-x.xx.jar之後正常。
對於爲什麼會出現循環依賴的這個問題，爲什麼會不確定性出現，按理說依賴衝突應該所有的機器都會出現這個錯誤，會什麼會不定性出現？還在進一步調研中...有結論會在此博客更新。
參考鏈接：https://stackoverflow.com/questions/17584495/unable-to-complete-the-scan-for-annotations-for-web-application-app-due-to-a