Introduction

Wildfy Java Application Server is a product or a software for running a Java-based application. Detail information about the Wildfly product or software is available in Wikipedia page in this link. Initially, Wildfly is JBoss AS, or simply JBoss. It is an authored application server by JBoss with Red Hat as the developer. WildFly itself is mainly in Java and implements the Java Platform, Enterprise Edition (Java EE) specification. It runs on multiple platforms. Furthermore, WildFly is free and it is an open-source software. It is also subject to the requirements of the GNU Lesser General Public License (LGPL), version 2.1.

According to the reference in the previous link, on 20 November 2014, Widlfy has become the new name for the JBoss Application Server. On the other hand, the JBoss Community and other Red Hat JBoss products like JBoss Enterprise Application Platform still have the same name. This is an article where the content is specifically describing about how to start Wildfly Java Application Server. Using a specific command, starting Wildfly Java Application Server is not too hard and it is actually quite simple.

Starting the Wildfly Application Server

So, in order to start Wildfly Application Server, just execute the following command :

/opt/wildfly-xx.x.x.Final/bin/standalone.sh

The execution of the above command using Wildfly 17.0.1 in a real situation exists as follows :

user@hostname:~$ /opt/wildfly-17.0.1.Final/bin/standalone.sh 
=========================================================================
  JBoss Bootstrap Environment
  JBOSS_HOME: /opt/wildfly-17.0.1.Final
  JAVA: /opt/jdk1.8.0_202/bin/java
  JAVA_OPTS:  -server -Xms64m -Xmx512m -XX:MetaspaceSize=96M -XX:MaxMetaspaceSize=256m -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman -Djava.awt.headless=true 
=========================================================================
15:08:28,536 INFO  [org.jboss.modules] (main) JBoss Modules version 1.9.1.Final
15:08:30,028 INFO  [org.jboss.msc] (main) JBoss MSC version 1.4.8.Final
15:08:30,045 INFO  [org.jboss.threads] (main) JBoss Threads version 2.3.3.Final
15:08:30,174 INFO  [org.jboss.as] (MSC service thread 1-2) WFLYSRV0049: WildFly Full 17.0.1.Final (WildFly Core 9.0.2.Final) starting
15:08:32,898 INFO  [org.wildfly.security] (ServerService Thread Pool -- 25) ELY00001: WildFly Elytron version 1.9.1.Final
15:08:33,902 INFO  [org.jboss.as.controller.management-deprecated] (Controller Boot Thread) WFLYCTL0028: Attribute 'security-realm' in the resource at address '/core-service=management/management-interface=http-interface' is deprecated, and may be removed in a future version. See the attribute description in the output of the read-resource-description operation to learn more about the deprecation.
15:08:33,951 INFO  [org.jboss.as.controller.management-deprecated] (ServerService Thread Pool -- 30) WFLYCTL0028: Attribute 'security-realm' in the resource at address '/subsystem=undertow/server=default-server/https-listener=https' is deprecated, and may be removed in a future version. See the attribute description in the output of the read-resource-description operation to learn more about the deprecation.
15:08:34,019 INFO  [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0039: Creating http management service using socket-binding (management-http)
15:08:34,048 INFO  [org.xnio] (MSC service thread 1-4) XNIO version 3.7.2.Final
15:08:34,058 INFO  [org.xnio.nio] (MSC service thread 1-4) XNIO NIO Implementation Version 3.7.2.Final
15:08:34,122 INFO  [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 51) WFLYCLINF0001: Activating Infinispan subsystem.
15:08:34,149 INFO  [org.wildfly.extension.microprofile.config.smallrye._private] (ServerService Thread Pool -- 60) WFLYCONF0001: Activating WildFly MicroProfile Config Subsystem
15:08:34,156 INFO  [org.wildfly.extension.microprofile.metrics.smallrye] (ServerService Thread Pool -- 62) WFLYMETRICS0001: Activating Eclipse MicroProfile Metrics Subsystem
15:08:34,163 INFO  [org.wildfly.extension.microprofile.health.smallrye] (ServerService Thread Pool -- 61) WFLYHEALTH0001: Activating Eclipse MicroProfile Health Subsystem
15:08:34,173 INFO  [org.wildfly.extension.microprofile.opentracing] (ServerService Thread Pool -- 63) WFLYTRACEXT0001: Activating MicroProfile OpenTracing Subsystem
15:08:34,172 INFO  [org.jboss.as.jsf] (ServerService Thread Pool -- 58) WFLYJSF0007: Activated the following JSF Implementations: [main]
15:08:34,185 WARN  [org.jboss.as.txn] (ServerService Thread Pool -- 72) WFLYTX0013: The node-identifier attribute on the /subsystem=transactions is set to the default value. This is a danger for environments running multiple servers. Please make sure the attribute value is unique.
15:08:34,213 INFO  [org.jboss.as.connector] (MSC service thread 1-7) WFLYJCA0009: Starting JCA Subsystem (WildFly/IronJacamar 1.4.16.Final)
15:08:34,293 INFO  [org.jboss.as.webservices] (ServerService Thread Pool -- 74) WFLYWS0002: Activating WebServices Extension
15:08:34,374 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-3) WFLYUT0003: Undertow 2.0.21.Final starting
15:08:34,398 INFO  [org.jboss.as.naming] (ServerService Thread Pool -- 64) WFLYNAM0001: Activating Naming Subsystem
15:08:34,655 INFO  [org.jboss.as.jaxrs] (ServerService Thread Pool -- 53) WFLYRS0016: RESTEasy version 3.7.0.Final
15:08:34,735 INFO  [org.jboss.as.security] (ServerService Thread Pool -- 70) WFLYSEC0002: Activating Security Subsystem
15:08:34,737 INFO  [org.jboss.as.security] (MSC service thread 1-7) WFLYSEC0001: Current PicketBox version=5.0.3.Final
15:08:34,784 INFO  [org.wildfly.extension.io] (ServerService Thread Pool -- 52) WFLYIO001: Worker 'default' has auto-configured to 16 core threads with 128 task threads based on your 8 available processors
15:08:34,814 INFO  [io.smallrye.metrics] (MSC service thread 1-8) Converted [2] config entries and added [4] replacements
15:08:34,815 INFO  [org.jboss.as.connector.subsystems.datasources] (ServerService Thread Pool -- 43) WFLYJCA0004: Deploying JDBC-compliant driver class org.h2.Driver (version 1.4)
15:08:34,825 INFO  [io.smallrye.metrics] (MSC service thread 1-8) Converted [3] config entries and added [14] replacements
15:08:34,829 INFO  [org.jboss.as.ejb3] (MSC service thread 1-2) WFLYEJB0481: Strict pool slsb-strict-max-pool is using a max instance size of 128 (per class), which is derived from thread worker pool sizing.
15:08:34,829 INFO  [org.jboss.as.ejb3] (MSC service thread 1-5) WFLYEJB0482: Strict pool mdb-strict-max-pool is using a max instance size of 32 (per class), which is derived from the number of CPUs on this host.
15:08:34,838 INFO  [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-2) WFLYJCA0018: Started Driver service with driver-name = h2
15:08:34,885 INFO  [org.jboss.as.naming] (MSC service thread 1-1) WFLYNAM0003: Starting Naming Service
15:08:34,887 INFO  [org.jboss.as.mail.extension] (MSC service thread 1-2) WFLYMAIL0001: Bound mail session [java:jboss/mail/Default]
15:08:34,910 INFO  [org.wildfly.extension.undertow] (ServerService Thread Pool -- 73) WFLYUT0014: Creating file handler for path '/opt/wildfly-17.0.1.Final/welcome-content' with options [directory-listing: 'false', follow-symlink: 'false', case-sensitive: 'true', safe-symlink-paths: '[]']
15:08:35,030 INFO  [org.jboss.remoting] (MSC service thread 1-4) JBoss Remoting version 5.0.12.Final
15:08:35,249 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-1) WFLYUT0012: Started server default-server.
15:08:35,256 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-3) WFLYUT0018: Host default-host starting
15:08:35,466 INFO  [org.jboss.as.ejb3] (MSC service thread 1-7) WFLYEJB0493: EJB subsystem suspension complete
15:08:35,632 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-5) WFLYUT0006: Undertow HTTP listener default listening on 127.0.0.1:8080
15:08:35,891 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-3) WFLYJCA0001: Bound data source [java:jboss/datasources/ExampleDS]
15:08:36,624 INFO  [org.jboss.as.patching] (MSC service thread 1-7) WFLYPAT0050: WildFly Full cumulative patch ID is: base, one-off patches include: none
15:08:36,636 WARN  [org.jboss.as.domain.management.security] (MSC service thread 1-5) WFLYDM0111: Keystore /opt/wildfly-17.0.1.Final/standalone/configuration/application.keystore not found, it will be auto generated on first use with a self signed certificate for host localhost
15:08:36,642 INFO  [org.jboss.as.server.deployment.scanner] (MSC service thread 1-4) WFLYDS0013: Started FileSystemDeploymentService for directory /opt/wildfly-17.0.1.Final/standalone/deployments
15:08:37,123 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-1) WFLYUT0006: Undertow HTTPS listener https listening on 127.0.0.1:8443
15:08:37,474 INFO  [org.jboss.ws.common.management] (MSC service thread 1-8) JBWS022052: Starting JBossWS 5.3.0.Final (Apache CXF 3.3.2) 
15:08:37,552 INFO  [org.jboss.as.server] (Controller Boot Thread) WFLYSRV0212: Resuming server
15:08:37,554 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0060: Http management interface listening on http://127.0.0.1:9990/management
15:08:37,554 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0051: Admin console listening on http://127.0.0.1:9990
15:08:37,554 INFO  [org.jboss.as] (Controller Boot Thread) WFLYSRV0025: WildFly Full 17.0.1.Final (WildFly Core 9.0.2.Final) started in 11166ms - Started 314 of 576 services (369 services are lazy, passive or on-demand

The above output command indicating the Wildfly Java Application Server is running successfully. Apparently, the process is actually run in the foreground. So, whenever the command line interface where the above command running is terminated or it is closed, the process will stop as the following output :

^C16:18:43,941 INFO  [org.jboss.as.server] (Thread-2) WFLYSRV0272: Suspending server
16:18:44,004 INFO  [org.jboss.as.ejb3] (Thread-2) WFLYEJB0493: EJB subsystem suspension complete
16:18:44,021 INFO  [org.jboss.as.server] (Thread-2) WFLYSRV0220: Server shutdown has been requested via an OS signal
16:18:44,049 INFO  [org.jboss.as.connector.subsystems.datasources] (MSC service thread 1-8) WFLYJCA0010: Unbound data source [java:jboss/datasources/ExampleDS]
16:18:44,063 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-1) WFLYUT0019: Host default-host stopping
16:18:44,065 INFO  [org.jboss.as.mail.extension] (MSC service thread 1-3) WFLYMAIL0002: Unbound mail session [java:jboss/mail/Default]
16:18:44,068 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-2) WFLYUT0008: Undertow HTTP listener default suspending
16:18:44,067 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-5) WFLYUT0008: Undertow HTTPS listener https suspending
16:18:44,069 INFO  [org.jboss.as.connector.deployers.jdbc] (MSC service thread 1-3) WFLYJCA0019: Stopped Driver service with driver-name = h2
16:18:44,070 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-2) WFLYUT0007: Undertow HTTP listener default stopped, was bound to 127.0.0.1:8080
16:18:44,070 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-5) WFLYUT0007: Undertow HTTPS listener https stopped, was bound to 127.0.0.1:8443
16:18:44,111 INFO  [org.wildfly.extension.undertow] (MSC service thread 1-3) WFLYUT0004: Undertow 2.0.21.Final stopping
16:18:44,175 INFO  [org.jboss.as] (MSC service thread 1-5) WFLYSRV0050: WildFly Full 17.0.1.Final (WildFly Core 9.0.2.Final) stopped in 133ms
user@hostname:~$ 

The above process terminates upon the execution of the Ctrl+C command and the Wildfly Java application server’s service is also stop. So, there is a limitation on executing the above process. It stops when there is sudden termination on the command line interface where the command runs. It is because the process is running in the foreground. The command line interface must exist and must keep running the command for persisting or maintaining the process. Don’ t forget to check the service of the Wildfly Java application server.