Could not find artifact software.amazon.awssdk.crt:aws-crt-mqtt:jar:0.36.0-SNAPSHOT

[CrustyClappyBlabby]

I have cloned the repo to gda/aws-iot-device-sdk-java-v2

mvn clean install in repo root. could not find artifact upon mvn clean compile -U in /gda. I've checked its the correct version I have locally. When I look in /.m2/repository/software/amazon/awssdk/crt/aws-crt-mqtt/0.36.0/, there are only a " .lastupdated, file but no jar files. The same happens with aws-iot-device-sdk. I haven't tried this before, and I am attempting to subscribe to a single topic and print out the data. I've tried what I can find elsewhere, but with no luck.
Heres my pom:

4.0.0

<!-- Project Coordinates -->
<groupId>com.example</groupId>
<artifactId>basic-subscriber</artifactId>
<version>1.0.0</version>
<packaging>jar</packaging>

<name>Basic MQTT Subscriber</name>
<description>Java project to subscribe to the MQTT topic using AWS IoT Device SDK for Java V2</description>

<properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <maven.compiler.source>1.8</maven.compiler.source>
    <maven.compiler.target>1.8</maven.compiler.target>
    <aws.iot.device.sdk.version>1.0.0-SNAPSHOT</aws.iot.device.sdk.version>
</properties>


<dependencies>
    <dependency>
        <groupId>software.amazon.awssdk.iotdevicesdk</groupId>
        <artifactId>aws-iot-device-sdk</artifactId>
        <version>${aws.iot.device.sdk.version}</version>
    </dependency>
    <dependency>
        <groupId>software.amazon.awssdk.crt</groupId>
        <artifactId>aws-crt-mqtt</artifactId>
        <version>0.36.0</version>
    </dependency>
</dependencies>

<build>
    <plugins>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.8.1</version>
            <configuration>
                <source>${maven.compiler.source}</source>
                <target>${maven.compiler.target}</target>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.codehaus.mojo</groupId>
            <artifactId>exec-maven-plugin</artifactId>
            <version>3.0.0</version>
            <configuration>
                <mainClass>BasicSubscriber</mainClass>
            </configuration>
        </plugin>
    </plugins>
</build>

[bretambrose]

There is not a project/jar/library/artifact called aws-crt-mqtt anywhere. Did you mean aws-crt?

[CrustyClappyBlabby]

Yes:) i tried that aswell: Could not find artifact software.amazon.awssdk.crt:aws-crt:jar:0.36.0 in central (https://repo.maven.apache.org/maven2)

its trying to download even though I have just done the install, but seems during the install the jar is not moved to /.m2 so I cant find it, at least that's my guess.

[bretambrose]

0.36 does not exist. Unless you plan on modifying the SDK locally, I would just pull it from maven central directly rather than doing local installs and then trying to manually refer to the right CRT version. The SDK has never depended on 0.36 because the publishing pipeline failed when the tag was created.

[CrustyClappyBlabby]

I tried downloading from Maven Central, but regardless of the version, I kept getting the same error. How would I set up my pom to retrieve from Maven Central, I probably did something wrong then.

[bretambrose]

<dependencies>
    <dependency>
        <groupId>software.amazon.awssdk.iotdevicesdk</groupId>
        <artifactId>aws-iot-device-sdk</artifactId>
        <version>1.25.0</version>
    </dependency>
    <dependency>
        <groupId>software.amazon.awssdk.crt</groupId>
        <artifactId>aws-crt</artifactId>
        <version>0.37.0</version>
    </dependency>
</dependencies>

[CrustyClappyBlabby]

The goat! thank you man!

[CrustyClappyBlabby]

Though that did let the cimpiler get a bit further, as soon I import the following, I get not found error again:
import software.amazon.awssdk.crt.mqtt.MqttClientConnection;
import software.amazon.awssdk.crt.mqtt.MqttClientConnectionBuilder;
import software.amazon.awssdk.crt.mqtt.QualityOfService;

Error:
[ERROR] COMPILATION ERROR :
[INFO] -------------------------------------------------------------
[ERROR] /home/rusty/iotGDA/gda/src/main/java/BasicSubscriber.java:[11,39] cannot find symbol
symbol: class MqttClientConnectionBuilder
location: package software.amazon.awssdk.crt.mqtt
[ERROR] /home/rusty/iotGDA/gda/src/main/java/BasicSubscriber.java:[53,9] cannot find symbol
symbol: class MqttClientConnectionBuilder
location: class BasicSubscriber
[ERROR] /home/rusty/iotGDA/gda/src/main/java/BasicSubscriber.java:[54,17] cannot find symbol
symbol: variable MqttClientConnectionBuilder
location: class BasicSubscriber
[INFO] 3 errors
[INFO] -------------------------------------------------------------
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 15.102 s
[INFO] Finished at: 2025-04-09T21:23:35+02:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.8.1:compile (default-compile) on project basic-subscriber: Compilation failure: Compilation failure:
[ERROR] /home/rusty/iotGDA/gda/src/main/java/BasicSubscriber.java:[11,39] cannot find symbol
[ERROR] symbol: class MqttClientConnectionBuilder
[ERROR] location: package software.amazon.awssdk.crt.mqtt
[ERROR] /home/rusty/iotGDA/gda/src/main/java/BasicSubscriber.java:[53,9] cannot find symbol
[ERROR] symbol: class MqttClientConnectionBuilder
[ERROR] location: class BasicSubscriber
[ERROR] /home/rusty/iotGDA/gda/src/main/java/BasicSubscriber.java:[54,17] cannot find symbol
[ERROR] symbol: variable MqttClientConnectionBuilder
[ERROR] location: class BasicSubscriber
[ERROR] -> [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/MojoFailureException

[bretambrose]

There is no MqttClientConnectionBuilder type in the software.amazon.awssdk.crt.mqtt namespace.