Question

Tomcat 7无法写入访问日志并引发以下异常。

Nov 17, 2016 5:10:37 PM org.apache.catalina.connector.CoyoteAdapter log
WARNING: Exception while attempting to add an entry to the access log
java.lang.NullPointerException
        at org.apache.catalina.connector.CoyoteAdapter.log(CoyoteAdapter.java:555)
        at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:182)
        at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
        at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:745)

如何解决这个问题？

Answer 1

这是Tomcat中已知的问题，已在Tomcat 8.0.29中修复。升级Tomcat应该可以解决此问题。 https://bz.apache.org/bugzilla/show_bug.cgi?id=58578

其他方法是修改访问日志记录模式，不包含cookie。使用这样的东西：

pattern="%t %H request:%{SESSIONID}r %m %U %s %q %r"

而不是

pattern="%t %H cookie:%{SESSIONID}c request:%{SESSIONID}r %m %U %s %q %r"

在server.xml中。

    <!-- Access log processes all example.
         Documentation at: /docs/config/valve.html
         Note: The pattern used is equivalent to using pattern="common" -->
    <Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
           prefix="localhost_access_log" suffix=".txt"
           pattern="%h %l %u %t &quot;%r&quot; %s %b" />

  </Host>
</Engine>

尝试向访问日志添加条目时出现异常

1 个答案: