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alexxiyang / shiro-redis

shiro only provide the support of ehcache and concurrentHashMap. Here is an implement of redis cache can be used by shiro. Hope it will help you!
MIT License
1.17k stars 444 forks source link

偶发的NPE异常 #165

Closed ilaotan closed 1 year ago

ilaotan commented 1 year ago

java.lang.NullPointerException: null at org.apache.shiro.session.mgt.AbstractValidatingSessionManager.validateSessions(AbstractValidatingSessionManager.java:287) at witparking.shiro.SonliSessionManager.validateSessions(SonliSessionManager.java:59) at org.apache.shiro.session.mgt.ExecutorServiceSessionValidationScheduler.run(ExecutorServiceSessionValidationScheduler.java:120) at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) at java.util.concurrent.FutureTask.runAndReset(FutureTask.java:308) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:180) at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:294) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) at java.lang.Thread.run(Thread.java:748) 目前遇到一个偶发问题，我们redis中key值较多，代码RedisSessionDAO.java的getActiveSessions方法，scan了较长时间，等到调用deserialize时，该key值可能已经过期不存在了，导致了Session s是个null 然后报NPE了