title: Tomcat start not recognised by IDE
body: <p>I am using Netbeans 11 to deploy a WAR file. When using RUN, the IDE starts Tomcat, which shows the startup message:</p>
  
  <pre><code>INFO - Starting ProtocolHandler [http-nio-8080]
  INFO - Starting ProtocolHandler [ajp-nio-8009]
  INFO - Server startup in 815 ms
  </code></pre>
  
  <p>However, the IDE "Run" tab shows that the start failed, after the timeout: </p>
  
  <pre><code>Deploying on TomEE
      profile mode: false
      debug mode: false
      force redeploy: true
  Starting Tomcat process...
  Waiting for Tomcat...
  Starting of Tomcat failed.
  </code></pre>
  
  <p>Somehow the IDE is not detecting Tomcat properly, since Tomcat is indeed running and listening on port 8080. I have tried <a href="https://stackoverflow.com/questions/30647156/tomee-starts-but-netbeans-gives-failed-to-start-error">these suggestions</a>, especially the one with the IDE proxy and the connector, but none works.</p>
  
  <hr>
  
  <p>As per comments:</p>
  
  <p>1) I am running TomEE, although I think there is no difference from Netbeans point of view (or even from TomEE itself) with regards to my issue. Honestly, I think it is a Netbeans - Tomcat communication issue, TomEE just adds some libraries and other stuff that would affect later.</p>
  
  <p>2) I was using a custom <code>server.xml</code>, but now I am using the original one:</p>
  
  <pre><code>&lt;?xml version='1.0' encoding='utf-8'?&gt;
  &lt;!--
    Licensed to the Apache Software Foundation (ASF) under one or more
    contributor license agreements.  See the NOTICE file distributed with
    this work for additional information regarding copyright ownership.
    The ASF licenses this file to You under the Apache License, Version 2.0
    (the "License"); you may not use this file except in compliance with
    the License.  You may obtain a copy of the License at
  
        http://www.apache.org/licenses/LICENSE-2.0
  
    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.
  --&gt;
  &lt;!-- Note:  A "Server" is not itself a "Container", so you may not
       define subcomponents such as "Valves" at this level.
       Documentation at /docs/config/server.html
   --&gt;
  &lt;Server port="8005" shutdown="SHUTDOWN"&gt;
    &lt;!-- TomEE plugin for Tomcat --&gt;
    &lt;Listener className="org.apache.tomee.catalina.ServerListener" /&gt;
    &lt;Listener className="org.apache.catalina.startup.VersionLoggerListener" /&gt;
    &lt;!-- Security listener. Documentation at /docs/config/listeners.html
    &lt;Listener className="org.apache.catalina.security.SecurityListener" /&gt;
    --&gt;
    &lt;!--APR library loader. Documentation at /docs/apr.html --&gt;
    &lt;Listener className="org.apache.catalina.core.AprLifecycleListener" SSLEngine="on" /&gt;
    &lt;!-- Prevent memory leaks due to use of particular java/javax APIs--&gt;
    &lt;Listener className="org.apache.catalina.core.JreMemoryLeakPreventionListener" /&gt;
    &lt;Listener className="org.apache.catalina.mbeans.GlobalResourcesLifecycleListener" /&gt;
    &lt;Listener className="org.apache.catalina.core.ThreadLocalLeakPreventionListener" /&gt;
  
    &lt;!-- Global JNDI resources
         Documentation at /docs/jndi-resources-howto.html
    --&gt;
    &lt;GlobalNamingResources&gt;
      &lt;!-- Editable user database that can also be used by
           UserDatabaseRealm to authenticate users
      --&gt;
      &lt;Resource name="UserDatabase" auth="Container"
                type="org.apache.catalina.UserDatabase"
                description="User database that can be updated and saved"
                factory="org.apache.catalina.users.MemoryUserDatabaseFactory"
                pathname="conf/tomcat-users.xml" /&gt;
    &lt;/GlobalNamingResources&gt;
  
    &lt;!-- A "Service" is a collection of one or more "Connectors" that share
         a single "Container" Note:  A "Service" is not itself a "Container",
         so you may not define subcomponents such as "Valves" at this level.
         Documentation at /docs/config/service.html
     --&gt;
    &lt;Service name="Catalina"&gt;
  
      &lt;!--The connectors can use a shared executor, you can define one or more named thread pools--&gt;
      &lt;!--
      &lt;Executor name="tomcatThreadPool" namePrefix="catalina-exec-"
          maxThreads="150" minSpareThreads="4"/&gt;
      --&gt;
  
  
      &lt;!-- A "Connector" represents an endpoint by which requests are received
           and responses are returned. Documentation at :
           Java HTTP Connector: /docs/config/http.html
           Java AJP  Connector: /docs/config/ajp.html
           APR (HTTP/AJP) Connector: /docs/apr.html
           Define a non-SSL/TLS HTTP/1.1 Connector on port 8080
      --&gt;
      &lt;Connector port="8080" protocol="HTTP/1.1"
                 connectionTimeout="20000"
                 redirectPort="8443" xpoweredBy="false" server="Apache TomEE" /&gt;
      &lt;!-- A "Connector" using the shared thread pool--&gt;
      &lt;!--
      &lt;Connector executor="tomcatThreadPool"
                 port="8080" protocol="HTTP/1.1"
                 connectionTimeout="20000"
                 redirectPort="8443" /&gt;
      --&gt;
      &lt;!-- Define a SSL/TLS HTTP/1.1 Connector on port 8443
           This connector uses the NIO implementation with the JSSE engine. When
           using the JSSE engine, the JSSE configuration attributes must be used.
      --&gt;
      &lt;!--
      &lt;Connector port="8443" protocol="org.apache.coyote.http11.Http11NioProtocol"
                 maxThreads="150" SSLEnabled="true"&gt;
          &lt;SSLHostConfig&gt;
              &lt;Certificate certificateKeystoreFile="conf/localhost-rsa.jks"
                           type="RSA" xpoweredBy="false" server="Apache TomEE" /&gt;
          &lt;/SSLHostConfig&gt;
      &lt;/Connector&gt;
      --&gt;
      &lt;!-- Define a SSL/TLS HTTP/1.1 Connector on port 8443 with HTTP/2
           This connector uses the APR/native implementation. When using the
           APR/native implementation or the OpenSSL engine with NIO or NIO2 then
           the OpenSSL configuration attributes must be used.
      --&gt;
      &lt;!--
      &lt;Connector port="8443" protocol="org.apache.coyote.http11.Http11AprProtocol"
                 maxThreads="150" SSLEnabled="true" &gt;
          &lt;UpgradeProtocol className="org.apache.coyote.http2.Http2Protocol" xpoweredBy="false" server="Apache TomEE" /&gt;
          &lt;SSLHostConfig&gt;
              &lt;Certificate certificateKeyFile="conf/localhost-rsa-key.pem"
                           certificateFile="conf/localhost-rsa-cert.pem"
                           certificateChainFile="conf/localhost-rsa-chain.pem"
                           type="RSA" /&gt;
          &lt;/SSLHostConfig&gt;
      &lt;/Connector&gt;
      --&gt;
  
      &lt;!-- Define an AJP 1.3 Connector on port 8009 --&gt;
      &lt;Connector port="8009" protocol="AJP/1.3" redirectPort="8443" /&gt;
  
  
      &lt;!-- An Engine represents the entry point (within Catalina) that processes
           every request.  The Engine implementation for Tomcat stand alone
           analyzes the HTTP headers included with the request, and passes them
           on to the appropriate Host (virtual host).
           Documentation at /docs/config/engine.html --&gt;
  
      &lt;!-- You should set jvmRoute to support load-balancing via AJP ie :
      &lt;Engine name="Catalina" defaultHost="localhost" jvmRoute="jvm1"&gt;
      --&gt;
      &lt;Engine name="Catalina" defaultHost="localhost"&gt;
  
        &lt;!--For clustering, please take a look at documentation at:
            /docs/cluster-howto.html  (simple how to)
            /docs/config/cluster.html (reference documentation) --&gt;
        &lt;!--
        &lt;Cluster className="org.apache.catalina.ha.tcp.SimpleTcpCluster"/&gt;
        --&gt;
  
        &lt;!-- Use the LockOutRealm to prevent attempts to guess user passwords
             via a brute-force attack --&gt;
        &lt;Realm className="org.apache.catalina.realm.LockOutRealm"&gt;
          &lt;!-- This Realm uses the UserDatabase configured in the global JNDI
               resources under the key "UserDatabase".  Any edits
               that are performed against this UserDatabase are immediately
               available for use by the Realm.  --&gt;
          &lt;Realm className="org.apache.catalina.realm.UserDatabaseRealm"
                 resourceName="UserDatabase"/&gt;
        &lt;/Realm&gt;
  
        &lt;Host name="localhost"  appBase="webapps"
              unpackWARs="true" autoDeploy="true"&gt;
  
          &lt;!-- SingleSignOn valve, share authentication between web applications
               Documentation at: /docs/config/valve.html --&gt;
          &lt;!--
          &lt;Valve className="org.apache.catalina.authenticator.SingleSignOn" /&gt;
          --&gt;
  
          &lt;!-- Access log processes all example.
               Documentation at: /docs/config/valve.html
               Note: The pattern used is equivalent to using pattern="common" --&gt;
          &lt;Valve className="org.apache.catalina.valves.AccessLogValve" directory="logs"
                 prefix="localhost_access_log" suffix=".txt"
                 pattern="%h %l %u %t &amp;quot;%r&amp;quot; %s %b" /&gt;
  
        &lt;/Host&gt;
      &lt;/Engine&gt;
    &lt;/Service&gt;
  &lt;/Server&gt;
  </code></pre>
  
  <p>3) Tomcat stars correctly and I see the port 8080 opened in my computer. Actually I have to manually kill the process to be able to attempt a new run from Netbeans again, otherwise it will complain that the port is already open. Meanwhile, Netbeans just wait and wait... and at some point after "waiting for Tomcat" it just say it fails, like if it could not recognise Tomcat is ON. Tomcat stays running like nobody has communicated with it. So no other strange logs anywhere.</p>
  
  <p>4) From Netbans I can only "start", never stop because it has not detected Tomcat is running. So the "stop" command is disabled, as you said. Tomcat is running but the IDE never detected it running.</p>
  
  <p>5) This happens all the time, I am not able to run any project from the IDE.</p>
  
  <hr>
  
  <p>Netbeans log says:</p>
  
  <pre><code>INFO [org.netbeans.modules.tomcat5.deploy.TomcatManager]: TomEE version TOMEE_15, type TOMEE_PLUS
  INFO [null]: Last record repeated again.
  INFO [org.netbeans.modules.j2ee.deployment.devmodules.api.Deployment]
  org.netbeans.modules.j2ee.deployment.impl.ServerException: Starting of Tomcat failed.
      at org.netbeans.modules.j2ee.deployment.impl.ServerInstance._start(ServerInstance.java:1457)
      at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.startTarget(ServerInstance.java:1400)
      at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.startTarget(ServerInstance.java:1204)
      at org.netbeans.modules.j2ee.deployment.impl.ServerInstance.start(ServerInstance.java:1082)
      at org.netbeans.modules.j2ee.deployment.impl.TargetServer.startTargets(TargetServer.java:547)
  [catch] at org.netbeans.modules.j2ee.deployment.devmodules.api.Deployment.deploy(Deployment.java:190)
      at org.netbeans.modules.maven.j2ee.execution.DeploymentHelper.perform(DeploymentHelper.java:185)
      at org.netbeans.modules.maven.j2ee.execution.ExecutionChecker.executionResult(ExecutionChecker.java:70)
      at org.netbeans.modules.maven.execute.MavenCommandLineExecutor.run(MavenCommandLineExecutor.java:303)
      at org.netbeans.core.execution.RunClassThread.run(RunClassThread.java:128)
  </code></pre>