java - 服务器:[http-nio-8080-exec-7] org.apache.coyote.http11.Http11Processor.service 错误处理请求 java.lang.NullPointerException

Question

我的tomcat服务器总是抛出以下错误(在linux下，Tomcat版本是8.5.4，使用tail -f catalina.out):

第一个错误:

17-Jan-2017 10:39:24.982 SEVERE [http-nio-8080-exec-7] org.apache.coyote.http11.Http11Processor.service Error processing request
 java.lang.NullPointerException
    at org.apache.catalina.connector.Request.parseCookies(Request.java:3047)
    at org.apache.catalina.connector.Request.getServerCookies(Request.java:2098)
    at org.apache.catalina.connector.CoyoteAdapter.parseSessionCookiesId(CoyoteAdapter.java:1007)
    at org.apache.catalina.connector.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:707)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1110)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

17-Jan-2017 10:39:24.983 SEVERE [http-nio-8080-exec-7] org.apache.coyote.http11.Http11Processor.endRequest Error finishing response
 java.lang.NullPointerException

第二个错误:

17-Jan-2017 11:08:33.696 SEVERE [http-nio-8080-exec-8] org.apache.coyote.http11.Http11Processor.endRequest Error finishing response
 java.lang.NullPointerException

17-Jan-2017 11:08:33.743 SEVERE [http-nio-8080-exec-7] org.apache.coyote.http11.Http11Processor.service Error processing request
 java.lang.NullPointerException

17-Jan-2017 11:08:33.743 SEVERE [http-nio-8080-exec-7] org.apache.coyote.http11.Http11Processor.endRequest Error finishing response
 java.lang.NullPointerException

17-Jan-2017 11:08:33.838 SEVERE [http-nio-8080-exec-7] org.apache.coyote.http11.Http11Processor.service Error processing request
 java.lang.NullPointerException

17-Jan-2017 11:08:33.838 SEVERE [http-nio-8080-exec-7] org.apache.coyote.http11.Http11Processor.endRequest Error finishing response
 java.lang.NullPointerException

第三个错误:

17-Jan-2017 11:20:52.232 SEVERE [http-nio-8080-exec-3] org.apache.coyote.http11.Http11Processor.service Error processing request
 java.lang.NullPointerException
    at org.apache.tomcat.util.buf.MessageBytes.toChars(MessageBytes.java:257)
    at org.apache.catalina.connector.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:641)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
    at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1110)
    at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425)
    at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Thread.java:745)

前端html总是打印错误:

Failed to load resource: the server responded with a status of 502 (Bad Gateway)

后端服务器主要使用Spring、Jersey，前端使用H5、AngularJS。任何想法，我将不胜感激!

Answer 1

这是tomcat 8.5.x以后的重构带来的bug。可以搜索tomcat bug列表https://bz.apache.org/bugzilla/show_bug.cgi?id=60918

可以通过升级tomcat版本，或者修改server.xml来解决设置 useSendfile="false"

<Connector executor="tomcatThreadPool" port="8080" protocol="HTTP/1.1" maxHttpHeaderSize="16384" maxThreads="2000" connectionTimeout="60000" disableUploadTimeout="true" redirectPort="8443" useSendfile="false"/>