sun.misc.Unsafe警告

Question

我使用的是security，登录后我得到了奇怪的日志，并警告了sun.misc.Unsafe

2020-10-07 16:01:26,752 INFO [main] [org.apache.coyote.http11.Http11NioProtocol] - Starting ProtocolHandler ["https-jsse-nio-8443"]
2020-10-07 16:01:30,096 INFO [main] [org.springframework.boot.web.embedded.tomcat.TomcatWebServer] - Tomcat started on port(s): 8443 (https) with context path ''
2020-10-07 16:01:30,123 INFO [main] [com.wl.tms.frontend.launch.Application] - Started Application in 19.263 seconds (JVM running for 22.095)
2020-10-07 16:01:33,956 WARN [https-jsse-nio-8443-exec-1] [org.apache.tomcat.util.buf.ByteBufferUtils] - Cannot use direct ByteBuffer cleaner, memory leaking may occur
java.lang.ClassNotFoundException: sun.misc.Unsafe
at jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:583) ~[?:?]
at jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[?:?]
at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[?:?]
at java.lang.Class.forName0(Native Method) ~[?:?]
at java.lang.Class.forName(Class.java:315) ~[?:?]
at org.apache.tomcat.util.buf.ByteBufferUtils.<clinit>(ByteBufferUtils.java:47) [tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.tomcat.util.net.SocketBufferHandler.expand(SocketBufferHandler.java:161) [tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.tomcat.util.net.SecureNioChannel.processSNI(SecureNioChannel.java:334) [tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.tomcat.util.net.SecureNioChannel.handshake(SecureNioChannel.java:175) [tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1575) [tomcat-embed-core-9.0.30.jar:9.0.30]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.30.jar:9.0.30]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) [?:?]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) [?:?]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.30.jar:9.0.30]
at java.lang.Thread.run(Thread.java:834) [?:?]
2020-10-07 16:01:34,605 INFO [https-jsse-nio-8443-exec-7] [org.apache.catalina.core.ContainerBase.[Tomcat].[localhost].[/]] - Initializing Spring DispatcherServlet 'dispatcherServlet'
2020-10-07 16:01:34,606 INFO [https-jsse-nio-8443-exec-7] [org.springframework.web.servlet.DispatcherServlet] - Initializing Servlet 'dispatcherServlet'
2020-10-07 16:01:34,663 INFO [https-jsse-nio-8443-exec-7] [org.springframework.web.servlet.DispatcherServlet] - Completed initialization in 57 ms
2020-10-07 16:03:25,677 INFO [https-jsse-nio-8443-exec-10] [org.springframework.security.ldap.SpringSecurityLdapTemplate] - Ignoring PartialResultException
2020-10-07 16:03:25,761 DEBUG [https-jsse-nio-8443-exec-10] [com.wl.tms.frontend.security.HttpSecurityConfigurer$$EnhancerBySpringCGLIB$$82b12948] - User details: org.springframework.se

如何解决这一问题？

我正在使用sring boot -2.2.4 version和tomcat版本- 9.0.30

java -version
java version "11.0.7" 2020-04-14 LTS

Answer 1

sun.misc.Unsafe一直是在JDK 11中删除

但是..。Tomcat使用它，所以要么降低Java版本的级别，要么找一个替代Tomcat的方法。