程序运行,不时出现tomcat假死的情况

Question

程序运行,不时出现tomcat假死的情况(百分之九十九的情况请求接口可以请求通但是另外百分之一就要看运气了) ,这一次卡死了我就打开了 Java VisualVM出现以下信息技术不够烦请大佬帮忙解决

"http-nio-8080-exec-6" #30 daemon prio=5 os_prio=0 tid=0x000000002b157000 nid=0xc6c runnable [0x000000002dedb000]
   java.lang.Thread.State: RUNNABLE
        at java.io.FileOutputStream.writeBytes(Native Method)
        at java.io.FileOutputStream.write(FileOutputStream.java:326)
        at java.io.BufferedOutputStream.write(BufferedOutputStream.java:122)
        - locked <0x0000000642e61130> (a java.io.BufferedOutputStream)
        at java.io.PrintStream.write(PrintStream.java:480)
        - locked <0x0000000642e61110> (a java.io.PrintStream)
        at org.apache.tomcat.util.log.SystemLogHandler.write(SystemLogHandler.java:177)
        at org.apache.logging.log4j.core.appender.ConsoleAppender$SystemOutStream.write(ConsoleAppender.java:338)
        at java.io.PrintStream.write(PrintStream.java:480)
        - locked <0x00000006437fd0f0> (a java.io.PrintStream)
        at org.apache.logging.log4j.core.util.CloseShieldOutputStream.write(CloseShieldOutputStream.java:53)
        at org.apache.logging.log4j.core.appender.OutputStreamManager.writeToDestination(OutputStreamManager.java:262)
        - locked <0x00000006437cdaa0> (a org.apache.logging.log4j.core.appender.OutputStreamManager)
        at org.apache.logging.log4j.core.appender.OutputStreamManager.flushBuffer(OutputStreamManager.java:294)
        - locked <0x00000006437cdaa0> (a org.apache.logging.log4j.core.appender.OutputStreamManager)
        at org.apache.logging.log4j.core.appender.OutputStreamManager.flush(OutputStreamManager.java:303)
        - locked <0x00000006437cdaa0> (a org.apache.logging.log4j.core.appender.OutputStreamManager)
        at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.directEncodeEvent(AbstractOutputStreamAppender.java:179)
        at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.tryAppend(AbstractOutputStreamAppender.java:170)

Answer 1

应该是多线程控制出问题了，检查下程序中用到多线程的地方Locked ownable synchronizers:- (a java.util.concurrent.ThreadPoolExecutor$Worker)

Answer 2

你debug下，看看走到哪个地方挂掉了