mvn gcloud:run Hangs - google-app-engine

Question

I have a Google App Engine application which I'm trying to test locally. Whenever I run the following command:
mvn gcloud:run
The application never fully starts up. I have the following output written to my console:
mvn gcloud:run
[INFO] Scanning for projects...
[INFO]
[INFO] ------------------------------------------------------------------------
[INFO] Building Wildstar Service Desk 88
[INFO] ------------------------------------------------------------------------
[INFO]
[INFO] >>> gcloud-maven-plugin:2.0.9.95.v20160203:run (default-cli) > package # servicedesk >>>
[INFO]
[INFO] --- maven-resources-plugin:2.6:resources (default-resources) # servicedesk ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] Copying 0 resource
[INFO]
[INFO] --- maven-compiler-plugin:3.3:compile (default-compile) # servicedesk ---
[INFO] Nothing to compile - all classes are up to date
[INFO]
[INFO] --- maven-resources-plugin:2.6:testResources (default-testResources) # servicedesk ---
[INFO] Using 'UTF-8' encoding to copy filtered resources.
[INFO] skip non existing resourceDirectory /Users/derekberube/Documents/Programming/Java/Wildstar ServiceDesk/src/test/resources
[INFO]
[INFO] --- maven-compiler-plugin:3.3:testCompile (default-testCompile) # servicedesk ---
[INFO] No sources to compile
[INFO]
[INFO] --- maven-surefire-plugin:2.12.4:test (default-test) # servicedesk ---
[INFO] No tests to run.
[INFO]
[INFO] --- maven-war-plugin:2.6:war (default-war) # servicedesk ---
[INFO] Packaging webapp
[INFO] Assembling webapp [servicedesk] in [/Users/derekberube/Documents/Programming/Java/Wildstar ServiceDesk/target/servicedesk-88]
[INFO] Processing war project
[INFO] Copying webapp resources [/Users/derekberube/Documents/Programming/Java/Wildstar ServiceDesk/src/main/webapp]
[INFO] Webapp assembled in [26 msecs]
[INFO] Building war: /Users/derekberube/Documents/Programming/Java/Wildstar ServiceDesk/target/servicedesk-88.war
[INFO]
[INFO] <<< gcloud-maven-plugin:2.0.9.95.v20160203:run (default-cli) < package # servicedesk <<<
[INFO]
[INFO] --- gcloud-maven-plugin:2.0.9.95.v20160203:run (default-cli) # servicedesk ---
The following is the content of the log file generated by the gcloud process.
derekberube$ cat 22.54.23.587718.log
2016-03-07 22:54:23,593 DEBUG root Loaded Command Group: ['gcloud', 'info']
2016-03-07 22:54:23,594 DEBUG root Running gcloud.info with Namespace(__calliope_internal_deepest_parser=ArgumentParser(prog='gcloud.info', usage=None, description='This command displays information about the current gcloud environment.', version=None, formatter_class=<class 'argparse.HelpFormatter'>, conflict_handler='error', add_help=False), account=None, authority_selector=None, authorization_token_file=None, cmd_func=<bound method Command.Run of <googlecloudsdk.calliope.backend.Command object at 0x10cd2a590>>, command_path=['gcloud', 'info'], configuration=None, credential_file_override=None, document=None, format=None, h=None, help=None, http_timeout=None, log_http=None, project=None, quiet=None, show_log=False, trace_email=None, trace_log=False, trace_token=None, user_output_enabled=None, verbosity=None, version=None).
2016-03-07 22:54:23,687 INFO root Explict Display.
2016-03-07 22:54:23,687 INFO ___FILE_ONLY___ Google Cloud SDK [99.0.0]
Platform: [Mac OS X, x86_64]
Python Version: [2.7.10 (default, Oct 23 2015, 19:19:21) [GCC 4.2.1 Compatible Apple LLVM 7.0.0 (clang-700.0.59.5)]]
Python Location: [/usr/bin/python]
Site Packages: [Disabled]
Installation Root: [/Users/derekberube/google-cloud-sdk]
Installed Components:
core: [2016.02.26]
app-engine-python: [1.9.33]
core-nix: [2016.02.05]
pubsub-emulator: [2016.02.22]
kubectl: []
app-engine-java: [1.9.32]
gcloud: []
gsutil-nix: [4.15]
app-engine-python-extras: [1.9.21]
beta: [2016.01.12]
gsutil: [4.17]
bq: [2.0.18]
alpha: [2016.01.12]
gcd-emulator: [v1beta3-1.0.0]
bq-nix: [2.0.18]
kubectl-darwin-x86_64: [1.1.7]
System PATH: [/Library/Java/JavaVirtualMachines/jdk1.7.0.jdk/Contents/Home/bin:/Applications/appengine-java-sdk-1.9.32/bin:/Applications/Java Libraries/Metro/2.3.1//bin:/Users/derekberube/google-cloud-sdk/bin:/Library/Java/JavaVirtualMachines/jdk1.8.0.jdk/Contents/Home/bin:/usr/local/apache-maven/apache-maven-3.3.3/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/opt/X11/bin]
Cloud SDK on PATH: [True]
Installation Properties: [/Users/derekberube/google-cloud-sdk/properties]
User Config Directory: [/Users/derekberube/.config/gcloud]
User Properties: [/Users/derekberube/.config/gcloud/properties]
Account: [wildstarservicedesk-hrd#appspot.gserviceaccount.com]
Project: [wildstarservicedesk-hrd]
Current Properties:
[core]
project: [wildstarservicedesk-hrd]
account: [wildstarservicedesk-hrd#appspot.gserviceaccount.com]
disable_usage_reporting: [False]
[app]
suppress_change_warning: [true]
Logs Directory: [/Users/derekberube/.config/gcloud/logs]
Last Log File: [/Users/derekberube/.config/gcloud/logs/2016.03.07/21.02.55.937592.log]
2016-03-07 22:54:23,695 DEBUG root Metrics reporting process started.
The following is a copy of my pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<packaging>war</packaging>
<version>88</version>
<groupId>com.wildstartech</groupId>
<artifactId>servicedesk</artifactId>
<name>Wildstar Service Desk</name>
<url>http://servicedesk.wildstartech.com/</url>
<properties>
<appengine.app.version>${project.version}</appengine.app.version>
<appengine.target.version>1.9.32</appengine.target.version>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
</properties>
<prerequisites>
<maven>3.1.0</maven>
</prerequisites>
<build>
<!-- for hot reload of the web application -->
<outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
<plugins>
<plugin>
<groupId>org.eclipse.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>9.3.7.v20160115</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<version>3.3</version>
<artifactId>maven-compiler-plugin</artifactId>
<configuration>
<source>1.7</source>
<target>1.7</target>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
</plugin>
<plugin>
<groupId>org.codehaus.mojo</groupId>
<artifactId>versions-maven-plugin</artifactId>
<version>2.2</version>
</plugin>
<plugin>
<groupId>com.google.appengine</groupId>
<artifactId>gcloud-maven-plugin</artifactId>
<version>2.0.9.95.v20160203</version>
<configuration>
<log_level>debug</log_level>
<quiet>false</quiet>
</configuration>
</plugin>
</plugins>
</build>
</project>
The following is a tree structure of my project.
|____pom.xml
|____src
| |____main
| | |____java
| | |____resources
| | |____webapp
| | | |____index.html
| | | |____WEB-INF
| | | | |____appengine-web.xml
| | | | |____web.xml
The following is my appengine-web.xml configuration file.
<appengine-web-app xmlns="http://appengine.google.com/ns/1.0">
<application>wildstarservicedesk-hrd</application>
<beta-settings>
<setting name="java_quickstart" value="true"/>
</beta-settings>
<inbound-services>
<service>mail</service>
</inbound-services>
<sessions-enabled>true</sessions-enabled>
<!-- Configure java.util.logging -->
<system-properties>
<property name="java.util.logging.config.file"
value="WEB-INF/logging.properties" />
</system-properties>
<threadsafe>true</threadsafe>
<version>88</version>
<vm>true</vm>
</appengine-web-app>
The following is my web.xml file.
<?xml version="1.0" encoding="utf-8"?>
<web-app 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/web-app_3_1.xsd" version="3.1">
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
<welcome-file>index.xhtml</welcome-file>
<welcome-file>index.html</welcome-file>
</welcome-file-list>
</web-app>
And last, but not least, the following is the content of the index.html
<DOCTYPE html>
<html>
<head>
<title>Test JSP</title>
</head>
<body>
<p>This is a test.</p>
</body>
</html>
The following is the stack output.
jstack 5155
2016-03-07 23:58:29
Full thread dump Java HotSpot(TM) 64-Bit Server VM (24.80-b11 mixed mode):
"Attach Listener" daemon prio=5 tid=0x00007ff4a500b000 nid=0x3d0b waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"Service Thread" daemon prio=5 tid=0x00007ff4a281d800 nid=0x4e03 runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"C2 CompilerThread1" daemon prio=5 tid=0x00007ff4a1819000 nid=0x4c03 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"C2 CompilerThread0" daemon prio=5 tid=0x00007ff4a406a000 nid=0x4a03 waiting on condition [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"Signal Dispatcher" daemon prio=5 tid=0x00007ff4a4064800 nid=0x3e0f runnable [0x0000000000000000]
java.lang.Thread.State: RUNNABLE
"Finalizer" daemon prio=5 tid=0x00007ff4a4041800 nid=0x3803 in Object.wait() [0x0000700000d3a000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007aeb20070> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:135)
- locked <0x00000007aeb20070> (a java.lang.ref.ReferenceQueue$Lock)
at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java:151)
at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:209)
"Reference Handler" daemon prio=5 tid=0x00007ff4a1813800 nid=0x3603 in Object.wait() [0x0000700000c37000]
java.lang.Thread.State: WAITING (on object monitor)
at java.lang.Object.wait(Native Method)
- waiting on <0x00000007aeb10278> (a java.lang.ref.Reference$Lock)
at java.lang.Object.wait(Object.java:503)
at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:133)
- locked <0x00000007aeb10278> (a java.lang.ref.Reference$Lock)
"main" prio=5 tid=0x00007ff4a4001000 nid=0x1703 runnable [0x0000700000218000]
java.lang.Thread.State: RUNNABLE
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(SocketInputStream.java:152)
at java.net.SocketInputStream.read(SocketInputStream.java:122)
at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
at java.io.BufferedInputStream.read1(BufferedInputStream.java:275)
at java.io.BufferedInputStream.read(BufferedInputStream.java:334)
- locked <0x00000007abefec10> (a java.io.BufferedInputStream)
at sun.net.www.http.HttpClient.parseHTTPHeader(HttpClient.java:690)
at sun.net.www.http.HttpClient.parseHTTP(HttpClient.java:633)
at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1324)
- locked <0x00000007abee63d0> (a sun.net.www.protocol.http.HttpURLConnection)
at com.google.appengine.gcloudapp.GCloudAppRun.stopDevAppServer(GCloudAppRun.java:486)
at com.google.appengine.gcloudapp.GCloudAppRun.execute(GCloudAppRun.java:287)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:153)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:145)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:116)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:80)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:307)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:193)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:106)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:862)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:286)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:197)
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.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:356)
"VM Thread" prio=5 tid=0x00007ff4a4039800 nid=0x3403 runnable
"GC task thread#0 (ParallelGC)" prio=5 tid=0x00007ff4a400d000 nid=0x2403 runnable
"GC task thread#1 (ParallelGC)" prio=5 tid=0x00007ff4a400d800 nid=0x2603 runnable
"GC task thread#2 (ParallelGC)" prio=5 tid=0x00007ff4a180a800 nid=0x2803 runnable
"GC task thread#3 (ParallelGC)" prio=5 tid=0x00007ff4a400e800 nid=0x2a03 runnable
"GC task thread#4 (ParallelGC)" prio=5 tid=0x00007ff4a180f800 nid=0x2c03 runnable
"GC task thread#5 (ParallelGC)" prio=5 tid=0x00007ff4a1810800 nid=0x2e03 runnable
"GC task thread#6 (ParallelGC)" prio=5 tid=0x00007ff4a1811000 nid=0x3003 runnable
"GC task thread#7 (ParallelGC)" prio=5 tid=0x00007ff4a400f000 nid=0x3203 runnable
"VM Periodic Task Thread" prio=5 tid=0x00007ff4a281e800 nid=0x5003 waiting on condition
JNI global references: 236

Answer 1

From a terminal window, I ran the command ps -eaf |grep java and one of the processes listed in the output contained the word (java). This happens whenever the ps command is NOT able to read a value from the CMD column.
I used the kill -eaf command to terminate the thread running the (java) process.
After doing that, the mvn gcloud:run process continued execution.