Web service exception: " An exception or error occurred in the container during the request processing java.lang.Exception: Host is not set"

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I have a web method which gets some name and returns its required input type(BOM, AML, BOM and AML or any other name) by reading a class file(maven plugin file). While trying to do this, i am getting below exception.

[2017-08-02T17:14:33.902+0800] [Payara 4.1] [SEVERE] [AS-WEB-CORE-00037] [javax.enterprise.web.core] [tid: _ThreadID=47 _ThreadName=http-thread-pool::http-listener-1(1)] [timeMillis: 1501665273902] [levelValue: 1000] [[
  An exception or error occurred in the container during the request processing
java.lang.Exception: Host is not set
    at org.glassfish.grizzly.http.server.util.Mapper.map(Mapper.java:902)
    at org.apache.catalina.connector.CoyoteAdapter.postParseRequest(CoyoteAdapter.java:496)
    at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:309)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:238)
    at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:466)
    at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:169)
    at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:206)
    at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:180)
    at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
    at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
    at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
    at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
    at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:539)
    at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
    at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:593)
    at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:573)
    at java.lang.Thread.run(Thread.java:722)
]]

Can you help me to solve this?

payara maven web-services java
2 Answers

Grizzly obtains virtual host name from Host header in the request. Since HTTP 1.1, Host header is required. But if Host header is set an empty name, Grizzly cannot obtains the name and throws such exception.

Usually, Host request header is set by HTTP client. But even if Host header exists but its value is an empty because of some reasons, you will happen such a error.

user_82265790
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