Spring Boot中的max-http-header-size配置方式

server.max-http-header-size=1024000

server.max-http-header-size=10KB

@RestController
@RequestMapping(value = "/request-header-test")
public class MaxHttpHeaderSizeController {
    @GetMapping
    public boolean testMaxHTTPHeaderSize(@RequestHeader(value = "token") String token) {
    return true;
    }
}

## Server connections configuration
server.tomcat.threads.max=200
server.connection-timeout=5s
server.max-http-header-size=8KB
server.tomcat.max-swallow-size=2MB
server.tomcat.max-http-post-size=2MB

// 这里把栈信息粘贴出来看一下
Thread dump at 27588:02.814.491
* Thread group "main":
  Thread "http-nio-51026-exec-115":
    at java.lang.OutOfMemoryError.<init>() (line: 48)
    at java.nio.HeapByteBuffer.<init>(int, int) (line: 57)
    at java.nio.ByteBuffer.allocate(int) (line: 335)
    at org.apache.coyote.http11.Http11OutputBuffer.<init>(org.apache.coyote.Response, int) (line: 110)
    at org.apache.coyote.http11.Http11Processor.<init>(org.apache.coyote.http11.AbstractHttp11Protocol, org.apache.coyote.Adapter) (line: 163)
    at org.apache.coyote.http11.AbstractHttp11Protocol.createProcessor() (line: 1001)
    at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(org.apache.tomcat.util.net.SocketWrapperBase, org.apache.tomcat.util.net.SocketEvent) (line: 853)
    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun() (line: 1590)
    at org.apache.tomcat.util.net.SocketProcessorBase.run() (line: 49)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(java.util.concurrent.ThreadPoolExecutor$Worker) (line: 1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run() (line: 624)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run() (line: 61)
    at java.lang.Thread.run() (line: 748)

server:
    max-http-header-size: 10485760 #10M,值太大，并发量一上来服务就内存溢出了
# max-http-header-size单位为字节，默认值为8*1024字节=8kb