title: Tomcat SSL error after setting up certificate
body: <p><strong>This site can’t provide a secure connection localhost sent an invalid response</strong>.
      command used to generate cert and key pem file is as:</p>
  
  <blockquote>
    <p><strong>openssl req -x509 -newkey rsa:4096 -keyout key.pem -out cert.pem -days 365 -nodes</strong></p>
  </blockquote>
  
  <pre><code>  Tomcat connector is as:
  </code></pre>
  
  <blockquote>
  <pre><code>&lt;Connector port="8443" maxHttpHeaderSize="8192"
      maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
      enableLookups="false" disableUploadTimeout="true"
      acceptCount="100" scheme="https" secure="true"
      clientAuth="false" sslProtocol="TLS"
    SSLEngine="on"
    SSLCertificateFile="conf/cert.pem"
    SSLCertificateKeyFile="conf/key.pem" /&gt;
  </code></pre>
    
    <p><strong>> openssl req -x509 -newkey rsa:4096 -keyout
    key.pem -out cert.pem -days 365 -nodes</strong></p>
  </blockquote>
  
  <p>Generating a 4096 bit RSA private key
  ..........................................................................</p>
  
  <blockquote>
    <p>writing new private key to 'key.pem'</p>
  </blockquote>
  
  <hr>
  
  <hr>
  
  <p>*</p>
  
  <pre><code>Country Name (2 letter code) [AU]:IN 
  State or Province Name (full name) [Some-State]:MH 
  Locality Name (eg, city) []:Pune 
  Organization Name (eg, company) [Internet Widgits Pty Ltd]:softdel Organizational Unit Name (eg, section) []:iot 
  Common Name (e.g. server FQDN or YOUR name) []:localhost 
  Email Address []:xyz@gmail.com
  </code></pre>
  
  <p>*</p>
  
  <p><a href="https://localhost:8443/" rel="nofollow noreferrer">https://localhost:8443/</a></p>
  
  <p><strong><a href="https://i.stack.imgur.com/u9ks5.png" rel="nofollow noreferrer">to see error screenshot click here.</a></strong></p>
  
  <p>logs::</p>
  
  <pre><code>23-Jun-2018 13:29:35.460 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8080"]
  23-Jun-2018 13:29:35.483 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["http-nio-8443"]
  23-Jun-2018 13:29:35.488 INFO [main] org.apache.coyote.AbstractProtocol.start Starting ProtocolHandler ["ajp-nio-8009"]
  23-Jun-2018 13:29:35.490 INFO [main] org.apache.catalina.startup.Catalina.start Server startup in 5150 ms
  23-Jun-2018 13:29:35.656 INFO [http-nio-8443-exec-1] org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request header
   Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
   java.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens
      at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:410)
      at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:291)
      at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
      at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
      at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
      at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
      at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
      at java.lang.Thread.run(Thread.java:748)
  
  23-Jun-2018 13:29:35.659 INFO [http-nio-8443-exec-2] org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request header
   Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
   java.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens
      at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:410)
      at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:291)
      at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
      at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
      at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
      at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
      at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
      at java.lang.Thread.run(Thread.java:748)
  
  23-Jun-2018 13:29:35.720 INFO [http-nio-8443-exec-3] org.apache.coyote.http11.Http11Processor.service Error parsing HTTP request header
   Note: further occurrences of HTTP request parsing errors will be logged at DEBUG level.
   java.lang.IllegalArgumentException: Invalid character found in method name. HTTP method names must be tokens
      at org.apache.coyote.http11.Http11InputBuffer.parseRequestLine(Http11InputBuffer.java:410)
      at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:291)
      at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
      at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:754)
      at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1376)
      at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
      at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
      at java.lang.Thread.run(Thread.java:748)
  
  2018-06-23 13:29:42 [http-nio-8443-exec-17] INFO  org.apache.jsp.index_jsp -  - Entered page login
  </code></pre>