Apache FtpServer (Apache MINA) Exception with Passive Ports

The below error message in Apache FtpServer (Apache MINA) happens when you try to use Passive Ports below 1024, when the Ftp Client send the passive command "quote pasv" the FtpServer throws the Exception.

java.net.ConnectException: Connection timed out (Connection timed out)

    at java.base/java.net.PlainSocketImpl.socketConnect(Native Method)

    at java.base/java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:399)

    at java.base/java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:242)

    at java.base/java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:224)

    at java.base/java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)

    at java.base/java.net.Socket.connect(Socket.java:609)

    at java.base/java.net.Socket.connect(Socket.java:558)

    at org.apache.ftpserver.impl.IODataConnectionFactory.createDataSocket(IODataConnectionFactory.java:311)

    at org.apache.ftpserver.impl.IODataConnectionFactory.openConnection(IODataConnectionFactory.java:257)

    at org.apache.ftpserver.command.impl.NLST.execute(NLST.java:101)

    at org.apache.ftpserver.impl.DefaultFtpHandler.messageReceived(DefaultFtpHandler.java:211)

    at org.apache.ftpserver.listener.nio.FtpHandlerAdapter.messageReceived(FtpHandlerAdapter.java:62)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain$TailFilter.messageReceived(DefaultIoFilterChain.java:858)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:542)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:48)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:947)

    at org.apache.ftpserver.listener.nio.FtpLoggingFilter.messageReceived(FtpLoggingFilter.java:85)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:542)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:48)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:947)

    at org.apache.mina.core.filterchain.IoFilterEvent.fire(IoFilterEvent.java:74)

    at org.apache.mina.filter.logging.MdcInjectionFilter.filter(MdcInjectionFilter.java:135)

    at org.apache.mina.filter.util.CommonEventFilter.messageReceived(CommonEventFilter.java:70)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:542)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:48)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:947)

    at org.apache.mina.filter.codec.ProtocolCodecFilter$ProtocolDecoderOutputImpl.flush(ProtocolCodecFilter.java:398)

    at org.apache.mina.filter.codec.ProtocolCodecFilter.messageReceived(ProtocolCodecFilter.java:234)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain.callNextMessageReceived(DefaultIoFilterChain.java:542)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain.access$1300(DefaultIoFilterChain.java:48)

    at org.apache.mina.core.filterchain.DefaultIoFilterChain$EntryImpl$1.messageReceived(DefaultIoFilterChain.java:947)

    at org.apache.mina.core.filterchain.IoFilterEvent.fire(IoFilterEvent.java:74)

    at org.apache.mina.core.session.IoEvent.run(IoEvent.java:63)

    at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTask(OrderedThreadPoolExecutor.java:770)

    at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.runTasks(OrderedThreadPoolExecutor.java:762)

    at org.apache.mina.filter.executor.OrderedThreadPoolExecutor$Worker.run(OrderedThreadPoolExecutor.java:704)

    at java.base/java.lang.Thread.run(Thread.java:834)

To solve this problem use Passive Ports ABOVE 1024, so using 10000-10100 solved my problem:

Sample working configuration:

<server xmlns="http://mina.apache.org/ftpserver/spring/v1"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="

       http://mina.apache.org/ftpserver/spring/v1 http://mina.apache.org/ftpserver/ftpserver-1.0.xsd"

       id="myServer">

    <listeners>

        <nio-listener name="default" port="21">

            <ssl>

                <keystore file="./res/ftpserver.jks" password="password" />

            </ssl>

        <data-connection idle-timeout="60">

            <passive ports="10000-10100" external-address="200.1.2.3"/>

        </data-connection>

        </nio-listener>

    </listeners>

    <file-user-manager file="./res/conf/users.properties" encrypt-passwords="false"/>

</server>

Replace the IP ADDRESS 200.1.2.3 by the Real External IP of your server.

And allow the ports in iptables:

iptables -I INPUT -p tcp -m tcp --dport 20 -j ACCEPT

iptables -I INPUT -p tcp -m tcp --dport 21 -j ACCEPT

iptables -I INPUT -p tcp  --match multiport --dports 10000:11000 -j ACCEPT

Mensagens de erros comuns do Java JSF

Segue lista de erros comuns ao iniciar um projeto em JAVA com JSF + PRIMEFACES com o TOMCAT 

1. Factory 'javax.faces.lifecycle.ClientWindowFactory

Erro do Tomcat na Console:

com.jun.faces.config.ConfigurationException: Factory 'javax.faces.lifecycle.ClientWindowFactory' was not configured properly.

Solução:

Esse erro ocorre quando esquece de criar o "beans.xml".

Criar o "/src/main/webapp/WEB-INF/beans.xml"

<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://xmlns.jcp.org/xml/ns/javaee"     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"     xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee      http://xmlns.jcp.org/xml/ns/javaee/beans_2_0.xsd"     version="2.0" bean-discovery-mode="annotated"> </beans>

2. java.lang.ClassNotFoundException: javax.faces.webapp.FacesServlet

No Log:

GRAVE: Servlet [Faces Servlet] in web application [/com.example] threw load() exception

java.lang.ClassNotFoundException: javax.faces.webapp.FacesServlet

Solução: 

Após clicar em "Maven -> Update" esse erro pode ocorrer, porque o projeto não consegue mais encontrar as bibliotecas baixadas pelo Maven.

Adicionar as bibliotecas do Maven do Path:

Clique direito no projeto -> Properties -> Deployment Assembly -> Add -> Java Build Path Entries -> Maven Dependencies.

Isso ocorre no Updade do Maven porque o pom.xml deve especificar a versão 1.8 do java, sem essa configuração durante o "Maven Update" ele volta sozinho para versão 1.5 nas configurações.

<!-- Parâmetros de execução --> <build> <!-- Nome do arquivo empacotado (.war) que você vai entregar para o cliente --> <finalName>CursoJSF</finalName> <plugins> <!-- Compilador do Maven na versão 3.3 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <version>3.8.1</version>       <!-- Compilador do Java na versão 8 --> <configuration> <source>1.8</source> <target>1.8</target> </configuration> </plugin> </plugins> </build>

Verificar aba "Problems" do Eclipse:

Mensagens do tipo "Cannot change version of project facet Dynamic Web Module to x.x" é causado porque o Eclipse muda a versão do web-app automaticamnete no web.xml após um "Maven Update".

Verifique se a versão do web-app está em 4_0, senão corrija no "web.xml"

<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_4_0.xsd" id="WebApp_ID" version="4.0">

TOMCAT NÃO INICIA - ERRO  WELD-000075

APARECE NO LOG:

Caused by: org.jboss.weld.exceptions.DefinitionException: WELD-000075: Normal scoped managed bean implementation class has a public field:  [EnhancedAnnotatedFieldImpl] public projetoweb.ComandoExterno.saidaDoComando

Explicação:

Erro: 

The motivation of WELD-000075 is technical. Access to a public field cannot be proxied. So a bean is required to be either pseudo scoped (@dependent, @singleton) or to guarantee access through public methods (which shouldn't be hard to achieve).

 

Resumindo:

EXISTE UM ATRIBUTO PÚBLICO NO BEAN QUE CAUSA UM ERRO NO CDI.

 

ERRADO:

public class ComandoExterno { public String saidaDoComando;

 

 

Solução:

TODOS OS ATRIBUTOS DO BEAN DEVEM SER PRIVATE COM ACESSO ATRAVÉS DE GET SET!!!

CERTO:

public class ComandoExterno {            private String saidaDoComando;

ERRO WELD-000072 - Bean declaring a passivating scope must be passivation capable.

O Bean quando é @SessionScoped ou @ViewScoped é OBRIGATÓRIO implementar Serializable!!!

Solução: SEMPRE IMPLEMENTAR SERIALIZABLE EM TODOS OS BEANS!!!

@Named @SessionScoped public class BotaoTeste implements Serializable{ ...

Jshell problem with PageUp and PageDown not working on Linux Ubuntu/CentOS

A very common problem in Java Shell Tool (jshell) are the Page-Up and Page-down keyboard keys that do not work properly when accessing through SSH terminal.

When you press page-up key, the terminal show "[1~" characters and when you press page-down key, the terminal show "[4~" characters. 

 This problem happended to me in Linux Ubuntu and Centos distributions, and I believe that it must occur with almost all other distributions. 

TROUBLESHOOTING

1) Temporary solution: 

Change TERM variable to "linux" before start jshell.

$ TERM=linux $ jshell  |  Welcome to JShell -- Version 11.0.10 |  For an introduction type: /help intro jshell>   // Now PgUp and PgDown works.

2) Permanent solution:

Change TERM variable at terminal startup in ~/.bashrc

$ echo "export TERM=linux"  >> ~/.bashrc

Now close your SSH connection, and connect again. 

Show TERM envirounment variable must be "linux"

$ echo $TERM linux

Start jshell:

$ jshell  |  Welcome to JShell -- Version 11.0.10 |  For an introduction type: /help intro jshell>   // Now PgUp and PgDown works.

3) Alternative solution:

Use terminal multiplexers like screen or tmux:

$ screen $ jshell  |  Welcome to JShell -- Version 11.0.10 |  For an introduction type: /help intro jshell>   // Now PgUp and PgDown works.