java.lang.NoSuchMethodError: com.google.api.client.http.HttpTransport.isMtls()Z

Question

I have an application I deploy on appengine using java8.
Lately when I tried deploying I get this error on run time:

Uncaught exception from servlet
java.lang.NoSuchMethodError: com.google.api.client.http.HttpTransport.isMtls()Z
    at com.google.api.services.storage.Storage$Builder.chooseEndpoint(Storage.java:11151)
    at com.google.api.services.storage.Storage$Builder.<init>(Storage.java:11184)
    at com.google.cloud.storage.spi.DefaultStorageRpc.<init>(DefaultStorageRpc.java:105)
    at com.google.cloud.storage.StorageOptions$DefaultStorageRpcFactory.create(StorageOptions.java:49)
    at com.google.cloud.storage.StorageOptions$DefaultStorageRpcFactory.create(StorageOptions.java:43)
    at com.google.cloud.ServiceOptions.getRpc(ServiceOptions.java:482)
    at com.google.cloud.storage.StorageImpl.<init>(StorageImpl.java:93)
    at com.google.cloud.storage.StorageOptions$DefaultStorageFactory.create(StorageOptions.java:39)
    at com.google.cloud.storage.StorageOptions$DefaultStorageFactory.create(StorageOptions.java:33)
    at com.google.cloud.ServiceOptions.getService(ServiceOptions.java:469)

here is 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>1.1-SNAPSHOT</version>

    <groupId>my.com.myapp</groupId>
    <artifactId>myapp</artifactId>

    <repositories>
        <repository>
            <id>local-maven-repo</id>
            <url>file:///${project.basedir}/local-maven-repo</url>
        </repository>
    </repositories>
    <!-- [START set_versions] -->
    <properties>
        <appengine.sdk.version>1.9.46</appengine.sdk.version>
        <google-api-client.version>1.21.0</google-api-client.version>

        <objectify.version>5.1.5</objectify.version>
        <guava.version>18.0</guava.version>

        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    </properties>

    <prerequisites>
        <maven>3.1.0</maven>
    </prerequisites>

    <dependencies>
        <dependency>
            <groupId>com.google.appengine</groupId>
            <artifactId>appengine-api-1.0-sdk</artifactId>
            <version>${appengine.sdk.version}</version>
        </dependency>
        <dependency>
            <groupId>javax.servlet</groupId>
            <artifactId>servlet-api</artifactId>
            <type>jar</type>
            <version>2.5</version>
            <scope>provided</scope>
        </dependency>
        <dependency>
            <groupId>com.google.appengine.tools</groupId>
            <artifactId>appengine-gcs-client</artifactId>
            <version>RELEASE</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.google.apis/google-api-services-storage -->
        <dependency>
            <groupId>com.google.apis</groupId>
            <artifactId>google-api-services-storage</artifactId>
            <version>RELEASE</version>
        </dependency>
        <dependency>
            <groupId>com.google.apis</groupId>
            <artifactId>google-api-services-pubsub</artifactId>
            <version>RELEASE</version>
        </dependency>


        <!-- slf4j API frontend binding with JUL backend -->
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.7</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-jdk14</artifactId>
            <version>1.7.7</version>
        </dependency>


        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-pubsub</artifactId>
            <version>0.8.3-alpha</version>
        </dependency>

        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-bigquery</artifactId>
            <version>0.8.3-beta</version>
        </dependency>

        <dependency>
            <groupId>com.google.cloud</groupId>
            <artifactId>google-cloud-storage</artifactId>
            <version>0.8.3-beta</version>
        </dependency>

        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-io</artifactId>
            <version>1.3.2</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.0</version>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.apache.commons/commons-lang3 -->
        <dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-lang3</artifactId>
            <version>3.0</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/junit/junit -->
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.7</version>
        </dependency>
        <!-- for comparing jsons check if soppurted on appengine for tests only-->
        <dependency>
            <groupId>org.skyscreamer</groupId>
            <artifactId>jsonassert</artifactId>
            <version>1.4.0</version>
            <scope>test</scope>
        </dependency>

        <!-- https://mvnrepository.com/artifact/org.springframework/spring-core for the integration reading from WEB-INF-->
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>2.5.6</version>
            <!--        <scope>integration</scope> -->
        </dependency>

        <!--added for pdf...-->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging</artifactId>
            <version>1.1.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging-api -->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging-api</artifactId>
            <version>1.1</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/commons-logging/commons-logging-adapters -->
        <dependency>
            <groupId>commons-logging</groupId>
            <artifactId>commons-logging-adapters</artifactId>
            <version>1.1</version>
        </dependency>
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>fontbox</artifactId>
            <version>1.8.0-SNAPSHOT</version>
        </dependency>
        <dependency>
            <groupId>org.apache.pdfbox</groupId>
            <artifactId>pdfbox</artifactId>
            <version>1.8.0-SNAPSHOT</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/fluent-hc -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>fluent-hc</artifactId>
            <version>4.5.3</version>
        </dependency>
        <!-- https://mvnrepository.com/artifact/org.apache.httpcomponents/httpmime -->
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.5.3</version>
        </dependency>

        <dependency>
            <groupId>com.github.wnameless</groupId>
            <artifactId>json-flattener-java7</artifactId>
            <version>0.4.0</version>
        </dependency>


    </dependencies>

    <build>
        <!-- for hot reload of the web application -->
        <outputDirectory>${project.build.directory}/${project.build.finalName}/WEB-INF/classes</outputDirectory>
        <plugins>
            <plugin>
                <groupId>com.google.cloud.tools</groupId>
                <artifactId>appengine-maven-plugin</artifactId>
                <version>2.2.0</version>
                <configuration>
                    <projectId>my-project-id</projectId>
                    <version>my-version</version>
                </configuration>
            </plugin>
            <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>1.8</source>
                    <target>1.8</target>
                </configuration>
            </plugin>

            <!--integration-test-->
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-failsafe-plugin</artifactId>
                <version>2.19.1</version>
                <configuration>
                    <parallel>methods</parallel>
                    <threadCount>10</threadCount>
                </configuration>
                <executions>
                    <execution>
                        <id>integration-test</id>
                        <goals>
                            <goal>integration-test</goal>
                        </goals>
                    </execution>
                    <execution>
                        <id>verify</id>
                        <goals>
                            <goal>verify</goal>
                        </goals>
                    </execution>
                </executions>
            </plugin>
        </plugins>


    </build>
</project>

I'll note that deploy works well when deploying on pc that has done deploy in the past, but whe deploying first time on new pc I get above error on run time

I assume I need to change the version on

<dependency>
    <groupId>com.google.apis</groupId>
    <artifactId>google-api-services-storage</artifactId>
    <version>RELEASE</version>
</dependency>

what version should it be?

Answer 1

In general, such exception happens when you have two versions of the same class in the classpath. Some of the reasons that may happen are:

1. Your dependencies include two version of google-api-client. I don't see any direct dependency so It could be a transitive dependency. You can run mvn dependency:tree and look for google-api-client dependencies and exclude one of the jars
2. You are packing a provided dependency. It could be that app engine already include such jar with HttpTransport, if you also include this HttpTransport class into your artefact it will create problems. To fix this identify which dependency contains HttpTransport class and in your pom.xml add provided to it
3. This class is included in the classpath from some old jar in some generated repository. If this is the case all you have to do is reset your environment. Clone the repository again and re-init app engine