I'm trying to install & configure the application center for MobileFirst Server using the ant task to install. Prior to the install task I was able to use the database task to create necessary tables in the app center database.
I get the error mentioned in the logs below when running
ant -f configure-appcenter-liberty-mysql.xml install
root@ubuntu:/opt/IBM/MobileFirst_Platform_Server/ApplicationCenter/configuration-samples# sudo ant -v -f configure-appcenter-liberty-mysql-edited.xml install
Apache Ant(TM) version 1.9.3 compiled on April 8 2014
Buildfile: /opt/IBM/MobileFirst_Platform_Server/ApplicationCenter/configuration-samples/configure-appcenter-liberty-mysql-edited.xml
Detected Java version: 1.7 in: /usr/lib/jvm/java-7-openjdk-amd64/jre
Detected OS: Linux
parsing buildfile /opt/IBM/MobileFirst_Platform_Server/ApplicationCenter/configuration-samples/configure-appcenter-liberty-mysql-edited.xml with URI = file:/opt/IBM/MobileFirst_Platform_Server/ApplicationCenter/configuration-samples/configure-appcenter-liberty-mysql-edited.xml
Project base dir set to: /opt/IBM/MobileFirst_Platform_Server/ApplicationCenter/configuration-samples
parsing buildfile jar:file:/usr/share/ant/lib/ant.jar!/org/apache/tools/ant/antlib.xml with URI = jar:file:/usr/share/ant/lib/ant.jar!/org/apache/tools/ant/antlib.xml from a zip file
Build sequence for target(s) `install' is [install]
Complete build sequence is [install, help, minimal-update, databases, uninstall, ]
install:
[installApplicationCenter] Logging output of task <installApplicationCenter> to file /root/.mobilefirst_platform_server/configuration-logs/installApplicationCenter_2016_04_20_22_42_09.log
[installApplicationCenter] Copying /opt/IBM/MobileFirst_Platform_Server/tools/mysql-connector-java-5.1.38/mysql-connector-java-5.1.38-bin.jar to /opt/IBM/WebSphere/Liberty/usr/shared/resources/mysql/mysql-connector-java-5.1.38-bin.jar
[installApplicationCenter] Copying /opt/IBM/MobileFirst_Platform_Server/tools/mysql-connector-java-5.1.38/mysql-connector-java-5.1.38-bin.jar to /opt/IBM/WebSphere/Liberty/usr/shared/resources/mysql/mysql-connector-java-5.1.38-bin.jar
[installApplicationCenter] Copying /opt/IBM/WebSphere/Liberty/usr/servers/simpleServer/server.xml to /opt/IBM/WebSphere/Liberty/usr/servers/simpleServer/server.xml.bak2
[installApplicationCenter] Modifying /opt/IBM/WebSphere/Liberty/usr/servers/simpleServer/server.xml
[installApplicationCenter] Deleting /opt/IBM/WebSphere/Liberty/usr/servers/simpleServer/server.xml.bak2
BUILD FAILED
/opt/IBM/MobileFirst_Platform_Server/ApplicationCenter/configuration-samples/configure-appcenter-liberty-mysql-edited.xml:74: An error occured while reading file /opt/IBM/WebSphere/Liberty/usr/servers/simpleServer/server.xml. Error: null.
at com.ibm.worklight.config.ant.appserver.AppCenterAppServerTask.wasLibertyAugmentConfigFiles(AppCenterAppServerTask.java:654)
at com.ibm.worklight.config.ant.appserver.AppServerTask.configureAppServer(AppServerTask.java:4423)
at com.ibm.worklight.config.ant.appserver.AppServerTask.installItems(AppServerTask.java:4165)
at com.ibm.worklight.config.ant.appserver.AppCenterAppServerTask.installItems(AppCenterAppServerTask.java:1143)
at com.ibm.worklight.config.ant.appserver.AppServerTask.processItems(AppServerTask.java:4114)
at com.ibm.worklight.config.ant.appserver.AppCenterAppServerTask.buildAndProcessItems(AppCenterAppServerTask.java:1088)
at com.ibm.worklight.config.ant.appserver.AppServerTask.setupBuildAndProcessItems(AppServerTask.java:3064)
at com.ibm.worklight.config.ant.appserver.AppServerTask.doExecute(AppServerTask.java:307)
at com.ibm.worklight.config.ant.appserver.InstallApplicationCenterTask.execute(InstallApplicationCenterTask.java:28)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:435)
at org.apache.tools.ant.Target.performTasks(Target.java:456)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1393)
at org.apache.tools.ant.Project.executeTarget(Project.java:1364)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1248)
at org.apache.tools.ant.Main.runBuild(Main.java:851)
at org.apache.tools.ant.Main.startAnt(Main.java:235)
at org.apache.tools.ant.launch.Launcher.run(Launcher.java:280)
at org.apache.tools.ant.launch.Launcher.main(Launcher.java:109)
Caused by: java.lang.NullPointerException
at com.ibm.worklight.config.helper.appserver.WASLibertyAugmentServerXML.addAppCenterApplicationAndDataSourceElements(WASLibertyAugmentServerXML.java:1921)
at com.ibm.worklight.config.helper.appserver.WASLibertyAugmentServerXML.mainInstallApplicationCenter(WASLibertyAugmentServerXML.java:143)
at com.ibm.worklight.config.ant.appserver.AppCenterAppServerTask.wasLibertyAugmentConfigFiles(AppCenterAppServerTask.java:642)
... 25 more
Total time: 7 seconds
Just based on the name of the Ant file you're using, and the pathnames displayed in in the message output you included, it looks like you started from the wrong sample Ant file - in other words, it appears that you are using Liberty Profile as your application server, but you started from the sample Ant file for use with WebSphere Application Server.
Assuming that is in fact the case, you should start with the sample configuration file "configure-appcenter-liberty-mysql.xml" instead.
Also, just as a hint - it appears that even with the file you are using, you modified the sample Ant file provided with MobileFirst Platform Foundation 7.1 "in place" and wrote it back to it's original filename and used it? As mentioned in the documentation link you have in your question, it's actually recommended to make a copy of this file and work with the copy, rather than modifying the one we provide - that way, you'll always have the unmodified samples we provide, in case you want to refer to them, or use them as templates for a different server and/or different configuration.