之前使用的是apache-tomcat-7.0.26+jdk1.6.0_31运行很久了，算是正常，因为有时候也会出现close_wait过多问题，大约2-3千吧，然后就自动恢复了。
现在升级版本到apache-tomcat-8.0.9+jdk1.7.0_72运行7-8个小时就要重启，不然就报close_wait超高一万多个，然后就报socket connect timeout，必须重启，时间也不确定就是7-8个小时，有时长点十多个小时，不一定。查看tomcat的catalina.out有大量下面错误：
27-Oct-2015 22:25:33.621 INFO [pool-1300-thread-1] org.apache.coyote.AbstractProcessor.setErrorState An error occurred in processing while on a non-container thread. The connection will be closed immediately
java.io.IOException: APR error: -32

    at org.apache.coyote.http11.InternalAprOutputBuffer.writeToSocket(InternalAprOutputBuffer.java:292)
    at org.apache.coyote.http11.InternalAprOutputBuffer.writeToSocket(InternalAprOutputBuffer.java:245)
    at org.apache.coyote.http11.InternalAprOutputBuffer.flushBuffer(InternalAprOutputBuffer.java:214)
    at org.apache.coyote.http11.AbstractOutputBuffer.flush(AbstractOutputBuffer.java:306)
    at org.apache.coyote.http11.AbstractHttp11Processor.action(AbstractHttp11Processor.java:763)
    at org.apache.coyote.Response.action(Response.java:177)
    at org.apache.catalina.connector.OutputBuffer.doFlush(OutputBuffer.java:345)
    at org.apache.catalina.connector.OutputBuffer.flush(OutputBuffer.java:313)
    at org.apache.catalina.connector.CoyoteOutputStream.flush(CoyoteOutputStream.java:110)
    at net.bull.javamelody.FilterServletOutputStream.flush(FilterServletOutputStream.java:52)
    at sun.nio.cs.StreamEncoder.implFlush(StreamEncoder.java:297)
    at sun.nio.cs.StreamEncoder.flush(StreamEncoder.java:141)
    at java.io.OutputStreamWriter.flush(OutputStreamWriter.java:229)
    at java.io.PrintWriter.flush(PrintWriter.java:320)
    at com.iyd.commons.bigpipe.Pagelet.writeValue(Pagelet.java:86)
    at com.iyd.commons.bigpipe.Pagelet.call(Pagelet.java:78)
    at com.iyd.commons.bigpipe.Pagelet.call(Pagelet.java:1)
    at java.util.concurrent.FutureTask.run(FutureTask.java:262)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)

不知道是不是和版本升级有关系，请各位达人帮忙看看，非常感谢！