Cannot invoke "String.length()" because "str" is null

[simasch]

I sucessfully used use-dep-version but now I get this error and cannot find out what the problem is:

c:\Users\simon\Workspace\Dynasoft\tosca-ui>mvn versions:use-dep-version -Dincludes=ch.tosca:tosca-jooq -DdepVersion=22.2.680 -DforceVersion=true -Dincludes=ch.tosca:tosca-jooq -DdepVersion=22.2.680 -DforceVersion=true
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Build Order:
[INFO]
[INFO] tosca-ui                                                           [pom]
[INFO] tosca-standard                                                     [jar]
[INFO] tosca-develop                                                      [jar]
[INFO]
[INFO] -------------------------< ch.tosca:tosca-ui >--------------------------
[INFO] Building tosca-ui 23.1.19-SNAPSHOT                                 [1/3]
[INFO] --------------------------------[ pom ]---------------------------------
[INFO]
[INFO] --- versions-maven-plugin:2.15.0:use-dep-version (default-cli) @ tosca-ui ---
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary for tosca-ui 23.1.19-SNAPSHOT:
[INFO]
[INFO] tosca-ui ........................................... FAILURE [  0.658 s]
[INFO] tosca-standard ..................................... SKIPPED
[INFO] tosca-develop ...................................... SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  1.056 s
[INFO] Finished at: 2023-02-28T08:21:25+01:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.codehaus.mojo:versions-maven-plugin:2.15.0:use-dep-version (default-cli) on project tosca-ui: Execution default-cli of goal org.codehaus.mojo:versions-maven-plugin:2.15.0:use-dep-version failed: Cannot invoke "String.length()" because "str" is null -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginExecutionException

The pom.xml looks like this:

<?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>

    <parent>
        <groupId>ch.tosca</groupId>
        <artifactId>tosca-parent</artifactId>
        <version>23.1.2</version>
        <relativePath/> <!-- lookup parent from  repository -->
    </parent>

    <artifactId>tosca-ui</artifactId>
    <version>23.1.19-SNAPSHOT</version>
    <packaging>pom</packaging>

    <modules>
        <module>tosca-standard</module>
        <module>tosca-develop</module>
    </modules>

    <properties>
        <maven.compiler.source>17</maven.compiler.source>
        <maven.compiler.target>17</maven.compiler.target>
        <maven.compiler.release>17</maven.compiler.release>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>ch.tosca</groupId>
                <artifactId>tosca-jooq</artifactId>
                <version>22.2.679</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

    <build>
        <plugins>
            <plugin>
                <groupId>org.sonarsource.scanner.maven</groupId>
                <artifactId>sonar-maven-plugin</artifactId>
                <version>3.7.0.1746</version>
            </plugin>
            <plugin>
                <groupId>org.jacoco</groupId>
                <artifactId>jacoco-maven-plugin</artifactId>
                <version>0.8.8</version>
                <executions>
                    <execution>
                        <id>jacoco-initialize</id>
                        <goals>
                            <goal>prepare-agent</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>jacoco-site</id>
                        <phase>package</phase>
                        <goals>
                            <goal>report</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>
    </build>
</project>

Any help is appreciated.

[andrzejj0]

You're requested to provide the output of your maven command with -X.

So,

mvn versions:use-dep-version -Dincludes=ch.tosca:tosca-jooq -DdepVersion=22.2.680 -DforceVersion=true -Dincludes=ch.tosca:tosca-jooq -DdepVersion=22.2.680 -DforceVersion=true -X

[simasch]

Please find the output attached

output.txt

[andrzejj0]

Thanks, that's really helpful. Looks like the original version is null for one or more dependencies and that's what's causing the NPE. I'll look into it this afternoon.

[andrzejj0]

@simasch

Could you try, as a workaround, adding -DprocessDependencies=false and see if this resolves the issue?

[simasch]

The workaround works for me. Thanks!

[andrzejj0]

The workaround works for me. Thanks!

Good. Then the PR should fix the issue.