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Chapter 8. Jsvc
8.1. Introduction
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8.1.1. About Jsvc
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Jsvc is a set of libraries and applications which allow Java applications run on UNIX and UNIX-like platforms as a background service. It allows an application to perform operations as a privileged user, and then switch identity to a non-privileged user.
Jsvc uses three processes: a launcher process, a controller process and a controlled process. The controlled process is also the main Java thread. If the JVM crashes the controller process will restart it within 60 seconds. Jsvc is a daemon process and for JBoss EAP 6 it must be started by a privileged user.
Note
Jsvc is for use on Red Hat Enterprise Linux, Solaris and HP-UX only. For similar functionality on Microsoft Windows, see
prunsrv.exe in the Native Utilities for Windows Server download available from the Red Hat Customer Portal.
8.1.2. Start and Stop JBoss EAP using Jsvc
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The instructions for starting and stopping JBoss EAP using Jsvc vary, depending on which mode it is operating: standalone or domain. Be aware that if JBoss EAP is run in domain mode, Jsvc handles the process of the domain controller only. Whichever command you use to start JBoss EAP using Jsvc, it must be run by a privileged user.
Prerequisites
- If JBoss EAP was installed using the Zip method:
- Install the Native Utilities package for your operating system, available for download from the Red Hat Customer Portal. See Install Native Components and Native Utilities (Zip, Installer) in the Installation Guide.
- Create the user account under which the JBoss EAP 6 instance will run. The account used to start and stop the server must have read and write access to the directory in which JBoss EAP was installed.
- If JBoss EAP was installed using the RPM method, install the apache-commons-daemon-jsvc-eap6 package. See Install Native Components and Native Utilities (RPM Installation) in the Installation Guide.
The following commands are to start and stop JBoss EAP in either standalone or domain modes. Note that file locations are different depending on the method used to install Jsvc in JBoss EAP 6. Use the tables below to determine which files to use to resolve the variables in the commands.
Standalone Mode
The following instructions are to start or stop JBoss EAP in standalone mode.
| File Reference in Instructions | File Location |
|---|---|
| EAP-HOME |
${eap-installation-location}/jboss-eap-${version}
|
| JSVC-BIN |
EAP_HOME/modules/system/layers/base/native/sbin/jsvc
|
| JSVC-JAR |
EAP_HOME/modules/system/layers/base/native/sbin/commons-daemon.jar
|
| CONF-DIR |
EAP_HOME/standalone/configuration
|
| LOG-DIR |
EAP_HOME/standalone/log
|
| File Reference in Instructions | File Location |
|---|---|
| EAP-HOME |
/usr/share/jbossas
|
| JSVC-BIN |
/usr/bin/jsvc-eap6/jsvc
|
| JSVC-JAR |
EAP_HOME/modules/system/layers/base/native/sbin/commons-daemon.jar
|
| CONF-DIR |
/etc/jbossas/standalone
|
| LOG-DIR |
/var/log/jbossas/standalone
|
Start JBoss EAP in Standalone Mode
JSVC_BIN \ -outfile LOG_DIR/jsvc.out.log \ -errfile LOG_DIR/jsvc.err.log \ -pidfile LOG_DIR/jsvc.pid \ -user jboss \ -D[Standalone] -XX:+UseCompressedOops -Xms1303m \ -Xmx1303m -XX:MaxPermSize=256m \ -Djava.net.preferIPv4Stack=true -Djboss.modules.system.pkgs=org.jboss.byteman \ -Djava.awt.headless=true \ -Dorg.jboss.boot.log.file=LOG_DIR/server.log \ -Dlogging.configuration=file:CONF_DIR/logging.properties \ -Djboss.modules.policy-permissions \ -cp EAP_HOME/jboss-modules.jar:JSVC_JAR \ -Djboss.home.dir=EAP_HOME \ -Djboss.server.base.dir=EAP_HOME/standalone \ @org.jboss.modules.Main -start-method main \ -mp EAP_HOME/modules \ -jaxpmodule javax.xml.jaxp-provider \ org.jboss.as.standalone
Stop JBoss EAP in Standalone Mode
JSVC_BIN \ -stop \ -outfile LOG_DIR/jsvc.out.log \ -errfile LOG_DIR/jsvc.err.log \ -pidfile LOG_DIR/jsvc.pid \ -user jboss \ -D[Standalone] -XX:+UseCompressedOops -Xms1303m \ -Xmx1303m -XX:MaxPermSize=256m \ -Djava.net.preferIPv4Stack=true \ -Djboss.modules.system.pkgs=org.jboss.byteman \ -Djava.awt.headless=true \ -Dorg.jboss.boot.log.file=LOG_DIR/server.log \ -Dlogging.configuration=file:CONF_DIR/logging.properties \ -Djboss.modules.policy-permissions \ -cp EAP_HOME/jboss-modules.jar:JSVC_JAR \ -Djboss.home.dir=EAP_HOME \ -Djboss.server.base.dir=EAP_HOME/standalone \ @org.jboss.modules.Main -start-method main \ -mp EAP_HOME/modules \ -jaxpmodule javax.xml.jaxp-provider \ org.jboss.as.standalone
Domain Mode
The following instructions are to start or stop JBoss EAP in domain mode. Note that for domain mode, you must replace the JAVA_HOME variable with the Java home directory.
| File Reference in Instructions | File Location |
|---|---|
| EAP-HOME |
${eap-installation-location}/jboss-eap-${version}
|
| JSVC-BIN |
EAP_HOME/modules/system/layers/base/native/sbin/jsvc
|
| JSVC-JAR |
EAP_HOME/modules/system/layers/base/native/sbin/commons-daemon.jar
|
| CONF-DIR |
EAP_HOME/domain/configuration
|
| LOG-DIR |
EAP_HOME/domain/log
|
| File Reference in Instructions | File Location |
|---|---|
| EAP-HOME |
/usr/share/jbossas
|
| JSVC-BIN |
/usr/bin/jsvc-eap6/jsvc
|
| JSVC-JAR |
EAP_HOME/modules/system/layers/base/native/sbin/commons-daemon.jar
|
| CONF-DIR |
/etc/jbossas/domain
|
| LOG-DIR |
/var/log/jbossas/domain
|
Start JBoss EAP in Domain Mode
JSVC_BIN \ -outfile LOG_DIR/jsvc.out.log \ -errfile LOG_DIR/jsvc.err.log \ -pidfile LOG_DIR/jsvc.pid \ -user jboss \ -nodetach -D"[Process Controller]" -server -Xms64m \ -Xmx512m -XX:MaxPermSize=256m \ -Djava.net.preferIPv4Stack=true \ -Djboss.modules.system.pkgs=org.jboss.byteman \ -Djava.awt.headless=true \ -Dorg.jboss.boot.log.file=LOG_DIR/process-controller.log \ -Dlogging.configuration=file:CONF_DIR/logging.properties \ -Djboss.modules.policy-permissions \ -cp "EAP_HOME/jboss-modules.jar:JSVC_JAR" \ org.apache.commons.daemon.support.DaemonWrapper \ -start org.jboss.modules.Main -start-method main \ -mp EAP_HOME/modules org.jboss.as.process-controller \ -jboss-home EAP_HOME -jvm $JAVA_HOME/bin/java \ -mp EAP_HOME/modules -- \ -Dorg.jboss.boot.log.file=LOG_DIR/host-controller.log \ -Dlogging.configuration=file:CONF_DIR/logging.properties \ -Djboss.modules.policy-permissions \ -server -Xms64m -Xmx512m -XX:MaxPermSize=256m \ -Djava.net.preferIPv4Stack=true \ -Djboss.modules.system.pkgs=org.jboss.byteman \ -Djava.awt.headless=true -- -default-jvm $JAVA_HOME/bin/java
Stop JBoss EAP in Domain Mode
JSVC_BIN \ -stop \ -outfile LOG_DIR/jsvc.out.log \ -errfile LOG_DIR/jsvc.err.log \ -pidfile LOG_DIR/jsvc.pid \ -user jboss \ -nodetach -D"[Process Controller]" -server -Xms64m \ -Xmx512m -XX:MaxPermSize=256m \ -Djava.net.preferIPv4Stack=true \ -Djboss.modules.system.pkgs=org.jboss.byteman \ -Djava.awt.headless=true \ -Dorg.jboss.boot.log.file=LOG_DIR/process-controller.log \ -Dlogging.configuration=file:CONF_DIR/logging.properties \ -Djboss.modules.policy-permissions \ -cp "EAP_HOME/jboss-modules.jar:JSVC_JAR" \ org.apache.commons.daemon.support.DaemonWrapper \ -start org.jboss.modules.Main -start-method main \ -mp EAP_HOME/modules org.jboss.as.process-controller \ -jboss-home EAP_HOME -jvm $JAVA_HOME/bin/java \ -mp EAP_HOME/modules -- \ -Dorg.jboss.boot.log.file=LOG_DIR/host-controller.log \ -Dlogging.configuration=file:CONF_DIR/logging.properties \ -Djboss.modules.policy-permissions \ -server -Xms64m -Xmx512m -XX:MaxPermSize=256m \ -Djava.net.preferIPv4Stack=true \ -Djboss.modules.system.pkgs=org.jboss.byteman \ -Djava.awt.headless=true -- -default-jvm $JAVA_HOME/bin/java
Note
If JBoss EAP 6 is terminated abnormally, such as a JVM crash, Jsvc will automatically restart it. If JBoss EAP 6 is terminated correctly, Jsvc will also stop.
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