Fail to start by maven in version 4.1.1.171 and 4.1.1.171.0.1

[Harry Chan]

Please get the test case here https://github.com/hei1233212000/payara-micro-cannot-startup

I found that after updating from 164 to 171

Caused by: java.lang.ClassNotFoundException: fish.payara.micro.boot.PayaraMicroBoot

at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

... 22 more

will be thrown during start the swarm-micro by maven

mvn clean pakcage

Anyone has idea about it?

[Steve Millidge]

I suspect this is because the Payara Micro Jar is now a nested jar and needs to have a specific boot classloader as the Thread Context Classloader. Have you tried exec:exec instead and run via java -jar?

[Harry Chan]

When I run exec:exec, I encounter

Caused by: org.apache.maven.plugin.PluginParameterException: The parameters 'executable' for goal org.codehaus.mojo:exec-maven-plugin:1.5.0:exec are missing or invalid

at org.apache.maven.plugin.internal.DefaultMavenPluginManager.populatePluginFields(DefaultMavenPluginManager.java:641)

at org.apache.maven.plugin.internal.DefaultMavenPluginManager.getConfiguredMojo(DefaultMavenPluginManager.java:594)

at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:121)

at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:207)

... 26 more

Besides, I tried to NOT run the app but build an uber jar by the following pom.xml configuration

<executions>

  <execution>

      <id>payara-run</id>

      <phase>package</phase>

      <goals>

          <goal>java</goal>

      </goals>

      <configuration>

          <mainClass>fish.payara.micro.PayaraMicro</mainClass>

          <arguments>

              <argument>--deploy</argument>

              <argument>${basedir}/target/${project.build.finalName}.war</argument>

              <argument>--outputUberJar</argument>

              <argument>${basedir}/target/${project.build.finalName}.jar</argument>

          </arguments>

          <includeProjectDependencies>false</includeProjectDependencies>

          <includePluginDependencies>true</includePluginDependencies>

          <executableDependency>

              <groupId>fish.payara.extras</groupId>

              <artifactId>payara-micro</artifactId>

          </executableDependency>

      </configuration>

  </execution>

</executions>

However, it also encounter the same error as run the app by maven with clean package

Caused by: java.lang.ClassNotFoundException: fish.payara.micro.boot.PayaraMicroBoot

at java.net.URLClassLoader.findClass(URLClassLoader.java:381)

at java.lang.ClassLoader.loadClass(ClassLoader.java:424)

at java.lang.ClassLoader.loadClass(ClassLoader.java:357)

... 22 more

Any advice?

Thanks.

[Ondrej Mihályi]

Hi, according to Steve's reply, using exec:exec is probably the only way to go (instead of exec:java), either when you run an app or build a standalone JAR.

When you tried exec:exec, how did you specify the "executable" parameter? It should point to the "java" executable. See http://www.mojohaus.org/exec-maven-plugin/examples/example-exec-for-java-programs.html.

If you want to run with exec:exec with the payara-micro.jar provided as a maven dependency, I recommend using the dependency plugin to copy the payara-micro artifact into the target directory before exec:exec is called, and then specify the parameters of exec:exec to point to that JAR, with "-jar" argument to the java command.

Here is an example of pom.xml config:

<plugin>

    <artifactId>maven-dependency-plugin</artifactId>

    <version>2.6</version>

    <executions>

        <execution>

            <id>copy-payara-micro</id>

            <goals>

<goal>copy</goal>

            </goals>

            <configuration>

<outputDirectory>target</outputDirectory>

<stripVersion>true</stripVersion>

<silent>true</silent>

<artifactItems>

    <artifactItem>

        <groupId>fish.payara.extras</groupId>

        <artifactId>payara-micro</artifactId>

        <type>jar</type>

    </artifactItem>

</artifactItems>

            </configuration>

        </execution>

    </executions>

</plugin>

<plugin>

        <groupId>org.codehaus.mojo</groupId>

        <artifactId>exec-maven-plugin</artifactId>

        <version>1.6.0</version>

        <executions>

          <execution>

            <goals>

              <goal>exec</goal>

            </goals>

          </execution>

        </executions>

<configuration>

          <executable>java</executable>

          <arguments>

            <argument>-jar</argument>

            <argument>target/payara-micro.jar</argument>

            <argument>--deploy</argument>

            <argument>target/application.war</argument>

          </arguments>

        </configuration>      

</plugin>

[Harry Chan]

Thanks Ondrej! I can now run the application by maven and package the uber jar.

$mvn clean package exec:exec

Besides, I think it would be better to update the GiBook User guide https://payara.gitbooks.io/payara-server/content/documentation/payara-micro/maven/maven.html.

Thank you.